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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Forwarding database | |
3 | * Linux ethernet bridge | |
4 | * | |
5 | * Authors: | |
6 | * Lennert Buytenhek <buytenh@gnu.org> | |
7 | * | |
1da177e4 LT |
8 | * This program is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/init.h> | |
82524746 | 16 | #include <linux/rculist.h> |
1da177e4 LT |
17 | #include <linux/spinlock.h> |
18 | #include <linux/times.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/jhash.h> | |
3f890923 | 22 | #include <linux/random.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
60063497 | 24 | #include <linux/atomic.h> |
3f890923 | 25 | #include <asm/unaligned.h> |
2ba071ec | 26 | #include <linux/if_vlan.h> |
1da177e4 LT |
27 | #include "br_private.h" |
28 | ||
e18b890b | 29 | static struct kmem_cache *br_fdb_cache __read_mostly; |
424bb9c9 TM |
30 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
31 | const unsigned char *addr, | |
32 | __u16 vid); | |
1da177e4 | 33 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 34 | const unsigned char *addr, u16 vid); |
31e8a49c | 35 | static void fdb_notify(struct net_bridge *br, |
36 | const struct net_bridge_fdb_entry *, int); | |
1da177e4 | 37 | |
3f890923 SH |
38 | static u32 fdb_salt __read_mostly; |
39 | ||
87a596e0 | 40 | int __init br_fdb_init(void) |
1da177e4 LT |
41 | { |
42 | br_fdb_cache = kmem_cache_create("bridge_fdb_cache", | |
43 | sizeof(struct net_bridge_fdb_entry), | |
44 | 0, | |
20c2df83 | 45 | SLAB_HWCACHE_ALIGN, NULL); |
87a596e0 AM |
46 | if (!br_fdb_cache) |
47 | return -ENOMEM; | |
48 | ||
3f890923 | 49 | get_random_bytes(&fdb_salt, sizeof(fdb_salt)); |
87a596e0 | 50 | return 0; |
1da177e4 LT |
51 | } |
52 | ||
73afc906 | 53 | void br_fdb_fini(void) |
1da177e4 LT |
54 | { |
55 | kmem_cache_destroy(br_fdb_cache); | |
56 | } | |
57 | ||
58 | ||
59 | /* if topology_changing then use forward_delay (default 15 sec) | |
60 | * otherwise keep longer (default 5 minutes) | |
61 | */ | |
3f890923 | 62 | static inline unsigned long hold_time(const struct net_bridge *br) |
1da177e4 LT |
63 | { |
64 | return br->topology_change ? br->forward_delay : br->ageing_time; | |
65 | } | |
66 | ||
3f890923 | 67 | static inline int has_expired(const struct net_bridge *br, |
1da177e4 LT |
68 | const struct net_bridge_fdb_entry *fdb) |
69 | { | |
f64f9e71 | 70 | return !fdb->is_static && |
7cd8861a | 71 | time_before_eq(fdb->updated + hold_time(br), jiffies); |
1da177e4 LT |
72 | } |
73 | ||
2ba071ec | 74 | static inline int br_mac_hash(const unsigned char *mac, __u16 vid) |
1da177e4 | 75 | { |
2ba071ec | 76 | /* use 1 byte of OUI and 3 bytes of NIC */ |
3f890923 | 77 | u32 key = get_unaligned((u32 *)(mac + 2)); |
2ba071ec | 78 | return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); |
1da177e4 LT |
79 | } |
80 | ||
da678292 MM |
81 | static void fdb_rcu_free(struct rcu_head *head) |
82 | { | |
83 | struct net_bridge_fdb_entry *ent | |
84 | = container_of(head, struct net_bridge_fdb_entry, rcu); | |
85 | kmem_cache_free(br_fdb_cache, ent); | |
86 | } | |
87 | ||
145beee8 VY |
88 | /* When a static FDB entry is added, the mac address from the entry is |
89 | * added to the bridge private HW address list and all required ports | |
90 | * are then updated with the new information. | |
91 | * Called under RTNL. | |
92 | */ | |
020ec6ba | 93 | static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
94 | { |
95 | int err; | |
a3f5ee71 | 96 | struct net_bridge_port *p; |
145beee8 VY |
97 | |
98 | ASSERT_RTNL(); | |
99 | ||
100 | list_for_each_entry(p, &br->port_list, list) { | |
101 | if (!br_promisc_port(p)) { | |
102 | err = dev_uc_add(p->dev, addr); | |
103 | if (err) | |
104 | goto undo; | |
105 | } | |
106 | } | |
107 | ||
108 | return; | |
109 | undo: | |
a3f5ee71 LR |
110 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
111 | if (!br_promisc_port(p)) | |
112 | dev_uc_del(p->dev, addr); | |
145beee8 VY |
113 | } |
114 | } | |
115 | ||
116 | /* When a static FDB entry is deleted, the HW address from that entry is | |
117 | * also removed from the bridge private HW address list and updates all | |
118 | * the ports with needed information. | |
119 | * Called under RTNL. | |
120 | */ | |
020ec6ba | 121 | static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
122 | { |
123 | struct net_bridge_port *p; | |
124 | ||
125 | ASSERT_RTNL(); | |
126 | ||
127 | list_for_each_entry(p, &br->port_list, list) { | |
128 | if (!br_promisc_port(p)) | |
129 | dev_uc_del(p->dev, addr); | |
130 | } | |
131 | } | |
132 | ||
31e8a49c | 133 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
1da177e4 | 134 | { |
145beee8 | 135 | if (f->is_static) |
020ec6ba | 136 | fdb_del_hw_addr(br, f->addr.addr); |
145beee8 | 137 | |
1da177e4 | 138 | hlist_del_rcu(&f->hlist); |
31e8a49c | 139 | fdb_notify(br, f, RTM_DELNEIGH); |
da678292 | 140 | call_rcu(&f->rcu, fdb_rcu_free); |
1da177e4 LT |
141 | } |
142 | ||
960b589f TM |
143 | /* Delete a local entry if no other port had the same address. */ |
144 | static void fdb_delete_local(struct net_bridge *br, | |
145 | const struct net_bridge_port *p, | |
146 | struct net_bridge_fdb_entry *f) | |
147 | { | |
148 | const unsigned char *addr = f->addr.addr; | |
149 | u16 vid = f->vlan_id; | |
150 | struct net_bridge_port *op; | |
151 | ||
152 | /* Maybe another port has same hw addr? */ | |
153 | list_for_each_entry(op, &br->port_list, list) { | |
154 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && | |
155 | (!vid || nbp_vlan_find(op, vid))) { | |
156 | f->dst = op; | |
a778e6d1 | 157 | f->added_by_user = 0; |
960b589f TM |
158 | return; |
159 | } | |
160 | } | |
161 | ||
162 | /* Maybe bridge device has same hw addr? */ | |
163 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
164 | (!vid || br_vlan_find(br, vid))) { | |
165 | f->dst = NULL; | |
a778e6d1 | 166 | f->added_by_user = 0; |
960b589f TM |
167 | return; |
168 | } | |
169 | ||
170 | fdb_delete(br, f); | |
171 | } | |
172 | ||
424bb9c9 TM |
173 | void br_fdb_find_delete_local(struct net_bridge *br, |
174 | const struct net_bridge_port *p, | |
175 | const unsigned char *addr, u16 vid) | |
176 | { | |
177 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
178 | struct net_bridge_fdb_entry *f; | |
179 | ||
180 | spin_lock_bh(&br->hash_lock); | |
181 | f = fdb_find(head, addr, vid); | |
182 | if (f && f->is_local && !f->added_by_user && f->dst == p) | |
183 | fdb_delete_local(br, p, f); | |
184 | spin_unlock_bh(&br->hash_lock); | |
185 | } | |
186 | ||
1da177e4 LT |
187 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
188 | { | |
189 | struct net_bridge *br = p->br; | |
2836882f TM |
190 | struct net_port_vlans *pv = nbp_get_vlan_info(p); |
191 | bool no_vlan = !pv; | |
1da177e4 | 192 | int i; |
2836882f | 193 | u16 vid; |
9d6f229f | 194 | |
1da177e4 LT |
195 | spin_lock_bh(&br->hash_lock); |
196 | ||
197 | /* Search all chains since old address/hash is unknown */ | |
198 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
199 | struct hlist_node *h; | |
200 | hlist_for_each(h, &br->hash[i]) { | |
201 | struct net_bridge_fdb_entry *f; | |
202 | ||
203 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
a5642ab4 | 204 | if (f->dst == p && f->is_local && !f->added_by_user) { |
1da177e4 | 205 | /* delete old one */ |
960b589f TM |
206 | fdb_delete_local(br, p, f); |
207 | ||
bc9a25d2 VY |
208 | /* if this port has no vlan information |
209 | * configured, we can safely be done at | |
210 | * this point. | |
211 | */ | |
212 | if (no_vlan) | |
2836882f | 213 | goto insert; |
1da177e4 LT |
214 | } |
215 | } | |
216 | } | |
1da177e4 | 217 | |
2836882f TM |
218 | insert: |
219 | /* insert new address, may fail if invalid address or dup. */ | |
220 | fdb_insert(br, p, newaddr, 0); | |
221 | ||
222 | if (no_vlan) | |
223 | goto done; | |
224 | ||
225 | /* Now add entries for every VLAN configured on the port. | |
226 | * This function runs under RTNL so the bitmap will not change | |
227 | * from under us. | |
228 | */ | |
229 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) | |
230 | fdb_insert(br, p, newaddr, vid); | |
231 | ||
bc9a25d2 | 232 | done: |
1da177e4 LT |
233 | spin_unlock_bh(&br->hash_lock); |
234 | } | |
235 | ||
43598813 | 236 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
237 | { | |
238 | struct net_bridge_fdb_entry *f; | |
bc9a25d2 VY |
239 | struct net_port_vlans *pv; |
240 | u16 vid = 0; | |
43598813 | 241 | |
ac4c8868 TM |
242 | spin_lock_bh(&br->hash_lock); |
243 | ||
43598813 | 244 | /* If old entry was unassociated with any port, then delete it. */ |
2ba071ec | 245 | f = __br_fdb_get(br, br->dev->dev_addr, 0); |
43598813 | 246 | if (f && f->is_local && !f->dst) |
960b589f | 247 | fdb_delete_local(br, NULL, f); |
43598813 | 248 | |
bc9a25d2 VY |
249 | fdb_insert(br, NULL, newaddr, 0); |
250 | ||
251 | /* Now remove and add entries for every VLAN configured on the | |
252 | * bridge. This function runs under RTNL so the bitmap will not | |
253 | * change from under us. | |
254 | */ | |
255 | pv = br_get_vlan_info(br); | |
256 | if (!pv) | |
ac4c8868 | 257 | goto out; |
bc9a25d2 | 258 | |
ef40b7ef | 259 | for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) { |
bc9a25d2 VY |
260 | f = __br_fdb_get(br, br->dev->dev_addr, vid); |
261 | if (f && f->is_local && !f->dst) | |
960b589f | 262 | fdb_delete_local(br, NULL, f); |
bc9a25d2 VY |
263 | fdb_insert(br, NULL, newaddr, vid); |
264 | } | |
ac4c8868 TM |
265 | out: |
266 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 267 | } |
268 | ||
1da177e4 LT |
269 | void br_fdb_cleanup(unsigned long _data) |
270 | { | |
271 | struct net_bridge *br = (struct net_bridge *)_data; | |
272 | unsigned long delay = hold_time(br); | |
25442e06 | 273 | unsigned long next_timer = jiffies + br->ageing_time; |
1da177e4 LT |
274 | int i; |
275 | ||
27a42938 | 276 | spin_lock(&br->hash_lock); |
1da177e4 LT |
277 | for (i = 0; i < BR_HASH_SIZE; i++) { |
278 | struct net_bridge_fdb_entry *f; | |
b67bfe0d | 279 | struct hlist_node *n; |
1da177e4 | 280 | |
b67bfe0d | 281 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
071f7722 | 282 | unsigned long this_timer; |
3fcf9011 | 283 | if (f->is_static) |
071f7722 | 284 | continue; |
7cd8861a | 285 | this_timer = f->updated + delay; |
071f7722 | 286 | if (time_before_eq(this_timer, jiffies)) |
31e8a49c | 287 | fdb_delete(br, f); |
2bec008c | 288 | else if (time_before(this_timer, next_timer)) |
071f7722 | 289 | next_timer = this_timer; |
1da177e4 LT |
290 | } |
291 | } | |
27a42938 | 292 | spin_unlock(&br->hash_lock); |
1da177e4 | 293 | |
25442e06 | 294 | mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
1da177e4 LT |
295 | } |
296 | ||
9cf63747 SH |
297 | /* Completely flush all dynamic entries in forwarding database.*/ |
298 | void br_fdb_flush(struct net_bridge *br) | |
299 | { | |
300 | int i; | |
301 | ||
302 | spin_lock_bh(&br->hash_lock); | |
303 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
304 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
305 | struct hlist_node *n; |
306 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 307 | if (!f->is_static) |
31e8a49c | 308 | fdb_delete(br, f); |
9cf63747 SH |
309 | } |
310 | } | |
311 | spin_unlock_bh(&br->hash_lock); | |
312 | } | |
1a620698 | 313 | |
25985edc | 314 | /* Flush all entries referring to a specific port. |
9cf63747 SH |
315 | * if do_all is set also flush static entries |
316 | */ | |
1a620698 SH |
317 | void br_fdb_delete_by_port(struct net_bridge *br, |
318 | const struct net_bridge_port *p, | |
319 | int do_all) | |
1da177e4 LT |
320 | { |
321 | int i; | |
322 | ||
323 | spin_lock_bh(&br->hash_lock); | |
324 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
325 | struct hlist_node *h, *g; | |
9d6f229f | 326 | |
1da177e4 LT |
327 | hlist_for_each_safe(h, g, &br->hash[i]) { |
328 | struct net_bridge_fdb_entry *f | |
329 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 330 | if (f->dst != p) |
1da177e4 LT |
331 | continue; |
332 | ||
1a620698 SH |
333 | if (f->is_static && !do_all) |
334 | continue; | |
1da177e4 | 335 | |
a778e6d1 TM |
336 | if (f->is_local) |
337 | fdb_delete_local(br, p, f); | |
338 | else | |
339 | fdb_delete(br, f); | |
1da177e4 LT |
340 | } |
341 | } | |
342 | spin_unlock_bh(&br->hash_lock); | |
343 | } | |
344 | ||
eeaf61d8 | 345 | /* No locking or refcounting, assumes caller has rcu_read_lock */ |
1da177e4 | 346 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
2ba071ec VY |
347 | const unsigned char *addr, |
348 | __u16 vid) | |
1da177e4 | 349 | { |
1da177e4 LT |
350 | struct net_bridge_fdb_entry *fdb; |
351 | ||
b67bfe0d | 352 | hlist_for_each_entry_rcu(fdb, |
2ba071ec VY |
353 | &br->hash[br_mac_hash(addr, vid)], hlist) { |
354 | if (ether_addr_equal(fdb->addr.addr, addr) && | |
355 | fdb->vlan_id == vid) { | |
1da177e4 LT |
356 | if (unlikely(has_expired(br, fdb))) |
357 | break; | |
358 | return fdb; | |
359 | } | |
360 | } | |
361 | ||
362 | return NULL; | |
363 | } | |
364 | ||
e6373c4c | 365 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
366 | /* Interface used by ATM LANE hook to test |
367 | * if an addr is on some other bridge port */ | |
368 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
369 | { |
370 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 371 | struct net_bridge_port *port; |
da678292 MM |
372 | int ret; |
373 | ||
1da177e4 | 374 | rcu_read_lock(); |
b5ed54e9 | 375 | port = br_port_get_rcu(dev); |
376 | if (!port) | |
377 | ret = 0; | |
378 | else { | |
2ba071ec | 379 | fdb = __br_fdb_get(port->br, addr, 0); |
43598813 | 380 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 381 | fdb->dst->state == BR_STATE_FORWARDING; |
382 | } | |
1da177e4 | 383 | rcu_read_unlock(); |
1da177e4 | 384 | |
da678292 | 385 | return ret; |
1da177e4 | 386 | } |
da678292 | 387 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
388 | |
389 | /* | |
9d6f229f | 390 | * Fill buffer with forwarding table records in |
1da177e4 LT |
391 | * the API format. |
392 | */ | |
393 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
394 | unsigned long maxnum, unsigned long skip) | |
395 | { | |
396 | struct __fdb_entry *fe = buf; | |
397 | int i, num = 0; | |
1da177e4 LT |
398 | struct net_bridge_fdb_entry *f; |
399 | ||
400 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
401 | ||
402 | rcu_read_lock(); | |
403 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 404 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
405 | if (num >= maxnum) |
406 | goto out; | |
407 | ||
9d6f229f | 408 | if (has_expired(br, f)) |
1da177e4 LT |
409 | continue; |
410 | ||
43598813 | 411 | /* ignore pseudo entry for local MAC address */ |
412 | if (!f->dst) | |
413 | continue; | |
414 | ||
1da177e4 LT |
415 | if (skip) { |
416 | --skip; | |
417 | continue; | |
418 | } | |
419 | ||
420 | /* convert from internal format to API */ | |
421 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
422 | |
423 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 424 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
425 | fe->port_hi = f->dst->port_no >> 8; |
426 | ||
1da177e4 LT |
427 | fe->is_local = f->is_local; |
428 | if (!f->is_static) | |
a399a805 | 429 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
430 | ++fe; |
431 | ++num; | |
432 | } | |
433 | } | |
434 | ||
435 | out: | |
436 | rcu_read_unlock(); | |
437 | ||
438 | return num; | |
439 | } | |
440 | ||
664de48b | 441 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
2ba071ec VY |
442 | const unsigned char *addr, |
443 | __u16 vid) | |
664de48b | 444 | { |
664de48b | 445 | struct net_bridge_fdb_entry *fdb; |
446 | ||
b67bfe0d | 447 | hlist_for_each_entry(fdb, head, hlist) { |
2ba071ec VY |
448 | if (ether_addr_equal(fdb->addr.addr, addr) && |
449 | fdb->vlan_id == vid) | |
664de48b | 450 | return fdb; |
451 | } | |
452 | return NULL; | |
453 | } | |
454 | ||
455 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, | |
2ba071ec VY |
456 | const unsigned char *addr, |
457 | __u16 vid) | |
1da177e4 | 458 | { |
1da177e4 LT |
459 | struct net_bridge_fdb_entry *fdb; |
460 | ||
b67bfe0d | 461 | hlist_for_each_entry_rcu(fdb, head, hlist) { |
2ba071ec VY |
462 | if (ether_addr_equal(fdb->addr.addr, addr) && |
463 | fdb->vlan_id == vid) | |
1da177e4 LT |
464 | return fdb; |
465 | } | |
466 | return NULL; | |
467 | } | |
468 | ||
469 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, | |
470 | struct net_bridge_port *source, | |
2ba071ec VY |
471 | const unsigned char *addr, |
472 | __u16 vid) | |
1da177e4 LT |
473 | { |
474 | struct net_bridge_fdb_entry *fdb; | |
475 | ||
476 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
477 | if (fdb) { | |
478 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 479 | fdb->dst = source; |
2ba071ec | 480 | fdb->vlan_id = vid; |
03e9b64b | 481 | fdb->is_local = 0; |
482 | fdb->is_static = 0; | |
a5642ab4 | 483 | fdb->added_by_user = 0; |
cf6b8e1e | 484 | fdb->added_by_external_learn = 0; |
7cd8861a | 485 | fdb->updated = fdb->used = jiffies; |
1158f762 | 486 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
487 | } |
488 | return fdb; | |
489 | } | |
490 | ||
491 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 492 | const unsigned char *addr, u16 vid) |
1da177e4 | 493 | { |
bc9a25d2 | 494 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
495 | struct net_bridge_fdb_entry *fdb; |
496 | ||
497 | if (!is_valid_ether_addr(addr)) | |
498 | return -EINVAL; | |
499 | ||
bc9a25d2 | 500 | fdb = fdb_find(head, addr, vid); |
1da177e4 | 501 | if (fdb) { |
9d6f229f | 502 | /* it is okay to have multiple ports with same |
1da177e4 LT |
503 | * address, just use the first one. |
504 | */ | |
9d6f229f | 505 | if (fdb->is_local) |
1da177e4 | 506 | return 0; |
28a16c97 | 507 | br_warn(br, "adding interface %s with same address " |
1da177e4 | 508 | "as a received packet\n", |
9b46922e | 509 | source ? source->dev->name : br->dev->name); |
31e8a49c | 510 | fdb_delete(br, fdb); |
9d6f229f | 511 | } |
1da177e4 | 512 | |
bc9a25d2 | 513 | fdb = fdb_create(head, source, addr, vid); |
03e9b64b | 514 | if (!fdb) |
1da177e4 LT |
515 | return -ENOMEM; |
516 | ||
03e9b64b | 517 | fdb->is_local = fdb->is_static = 1; |
020ec6ba | 518 | fdb_add_hw_addr(br, addr); |
31e8a49c | 519 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
520 | return 0; |
521 | } | |
522 | ||
03e9b64b | 523 | /* Add entry for local address of interface */ |
1da177e4 | 524 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 525 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
526 | { |
527 | int ret; | |
528 | ||
529 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 530 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
531 | spin_unlock_bh(&br->hash_lock); |
532 | return ret; | |
533 | } | |
534 | ||
535 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 536 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 537 | { |
2ba071ec | 538 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 539 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 540 | bool fdb_modified = false; |
1da177e4 LT |
541 | |
542 | /* some users want to always flood. */ | |
543 | if (hold_time(br) == 0) | |
544 | return; | |
545 | ||
df1c0b84 SH |
546 | /* ignore packets unless we are using this port */ |
547 | if (!(source->state == BR_STATE_LEARNING || | |
548 | source->state == BR_STATE_FORWARDING)) | |
549 | return; | |
550 | ||
2ba071ec | 551 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
552 | if (likely(fdb)) { |
553 | /* attempt to update an entry for a local interface */ | |
554 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 555 | if (net_ratelimit()) |
28a16c97 | 556 | br_warn(br, "received packet on %s with " |
557 | "own address as source address\n", | |
558 | source->dev->name); | |
1da177e4 LT |
559 | } else { |
560 | /* fastpath: update of existing entry */ | |
c65c7a30 JM |
561 | if (unlikely(source != fdb->dst)) { |
562 | fdb->dst = source; | |
563 | fdb_modified = true; | |
564 | } | |
7cd8861a | 565 | fdb->updated = jiffies; |
a5642ab4 TM |
566 | if (unlikely(added_by_user)) |
567 | fdb->added_by_user = 1; | |
c65c7a30 JM |
568 | if (unlikely(fdb_modified)) |
569 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1da177e4 LT |
570 | } |
571 | } else { | |
f8ae737d | 572 | spin_lock(&br->hash_lock); |
2ba071ec VY |
573 | if (likely(!fdb_find(head, addr, vid))) { |
574 | fdb = fdb_create(head, source, addr, vid); | |
a5642ab4 TM |
575 | if (fdb) { |
576 | if (unlikely(added_by_user)) | |
577 | fdb->added_by_user = 1; | |
31e8a49c | 578 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 579 | } |
f58ee4e1 | 580 | } |
1da177e4 LT |
581 | /* else we lose race and someone else inserts |
582 | * it first, don't bother updating | |
583 | */ | |
f8ae737d | 584 | spin_unlock(&br->hash_lock); |
1da177e4 | 585 | } |
1da177e4 | 586 | } |
b078f0df | 587 | |
588 | static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb) | |
589 | { | |
590 | if (fdb->is_local) | |
591 | return NUD_PERMANENT; | |
592 | else if (fdb->is_static) | |
593 | return NUD_NOARP; | |
594 | else if (has_expired(fdb->dst->br, fdb)) | |
595 | return NUD_STALE; | |
596 | else | |
597 | return NUD_REACHABLE; | |
598 | } | |
599 | ||
31e8a49c | 600 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 601 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 602 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 603 | { |
604 | unsigned long now = jiffies; | |
605 | struct nda_cacheinfo ci; | |
606 | struct nlmsghdr *nlh; | |
607 | struct ndmsg *ndm; | |
608 | ||
15e47304 | 609 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 610 | if (nlh == NULL) |
611 | return -EMSGSIZE; | |
612 | ||
b078f0df | 613 | ndm = nlmsg_data(nlh); |
614 | ndm->ndm_family = AF_BRIDGE; | |
615 | ndm->ndm_pad1 = 0; | |
616 | ndm->ndm_pad2 = 0; | |
cf6b8e1e | 617 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
b078f0df | 618 | ndm->ndm_type = 0; |
43598813 | 619 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
b078f0df | 620 | ndm->ndm_state = fdb_to_nud(fdb); |
621 | ||
2eb812e6 DM |
622 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
623 | goto nla_put_failure; | |
41c389d7 RP |
624 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
625 | goto nla_put_failure; | |
b078f0df | 626 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
627 | ci.ndm_confirmed = 0; | |
628 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
629 | ci.ndm_refcnt = 0; | |
2eb812e6 DM |
630 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
631 | goto nla_put_failure; | |
1690be63 | 632 | |
47fab41a | 633 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
1690be63 VY |
634 | goto nla_put_failure; |
635 | ||
053c095a JB |
636 | nlmsg_end(skb, nlh); |
637 | return 0; | |
b078f0df | 638 | |
639 | nla_put_failure: | |
640 | nlmsg_cancel(skb, nlh); | |
641 | return -EMSGSIZE; | |
642 | } | |
643 | ||
644 | static inline size_t fdb_nlmsg_size(void) | |
645 | { | |
646 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
647 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
41c389d7 | 648 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
1690be63 | 649 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df | 650 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
651 | } | |
652 | ||
31e8a49c | 653 | static void fdb_notify(struct net_bridge *br, |
654 | const struct net_bridge_fdb_entry *fdb, int type) | |
b078f0df | 655 | { |
31e8a49c | 656 | struct net *net = dev_net(br->dev); |
b078f0df | 657 | struct sk_buff *skb; |
658 | int err = -ENOBUFS; | |
659 | ||
660 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
661 | if (skb == NULL) | |
662 | goto errout; | |
663 | ||
31e8a49c | 664 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 665 | if (err < 0) { |
666 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
667 | WARN_ON(err == -EMSGSIZE); | |
668 | kfree_skb(skb); | |
669 | goto errout; | |
670 | } | |
671 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
672 | return; | |
673 | errout: | |
87e823b3 | 674 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 675 | } |
676 | ||
677 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
678 | int br_fdb_dump(struct sk_buff *skb, |
679 | struct netlink_callback *cb, | |
680 | struct net_device *dev, | |
5d5eacb3 | 681 | struct net_device *filter_dev, |
77162022 | 682 | int idx) |
b078f0df | 683 | { |
77162022 JF |
684 | struct net_bridge *br = netdev_priv(dev); |
685 | int i; | |
b078f0df | 686 | |
77162022 JF |
687 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
688 | goto out; | |
b078f0df | 689 | |
6cb69742 HS |
690 | if (!filter_dev) |
691 | idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
692 | ||
77162022 | 693 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 694 | struct net_bridge_fdb_entry *f; |
b078f0df | 695 | |
b67bfe0d | 696 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
77162022 JF |
697 | if (idx < cb->args[0]) |
698 | goto skip; | |
699 | ||
5e6d2435 JHS |
700 | if (filter_dev && |
701 | (!f->dst || f->dst->dev != filter_dev)) { | |
702 | if (filter_dev != dev) | |
703 | goto skip; | |
6cb69742 | 704 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
705 | * It means the MAC belongs to the bridge |
706 | * Therefore need a little more filtering | |
707 | * we only want to dump the !f->dst case | |
708 | */ | |
709 | if (f->dst) | |
710 | goto skip; | |
711 | } | |
6cb69742 HS |
712 | if (!filter_dev && f->dst) |
713 | goto skip; | |
5d5eacb3 | 714 | |
77162022 | 715 | if (fdb_fill_info(skb, br, f, |
15e47304 | 716 | NETLINK_CB(cb->skb).portid, |
77162022 JF |
717 | cb->nlh->nlmsg_seq, |
718 | RTM_NEWNEIGH, | |
719 | NLM_F_MULTI) < 0) | |
720 | break; | |
b078f0df | 721 | skip: |
77162022 | 722 | ++idx; |
b078f0df | 723 | } |
724 | } | |
b078f0df | 725 | |
77162022 JF |
726 | out: |
727 | return idx; | |
b078f0df | 728 | } |
36fd2b63 | 729 | |
292d1398 | 730 | /* Update (create or replace) forwarding database entry */ |
36fd2b63 | 731 | static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, |
2ba071ec | 732 | __u16 state, __u16 flags, __u16 vid) |
36fd2b63 | 733 | { |
734 | struct net_bridge *br = source->br; | |
2ba071ec | 735 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 736 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 737 | bool modified = false; |
36fd2b63 | 738 | |
2ba071ec | 739 | fdb = fdb_find(head, addr, vid); |
64af1bac | 740 | if (fdb == NULL) { |
741 | if (!(flags & NLM_F_CREATE)) | |
742 | return -ENOENT; | |
36fd2b63 | 743 | |
2ba071ec | 744 | fdb = fdb_create(head, source, addr, vid); |
64af1bac | 745 | if (!fdb) |
746 | return -ENOMEM; | |
b0a397fb | 747 | |
748 | modified = true; | |
64af1bac | 749 | } else { |
750 | if (flags & NLM_F_EXCL) | |
751 | return -EEXIST; | |
b0a397fb | 752 | |
753 | if (fdb->dst != source) { | |
754 | fdb->dst = source; | |
755 | modified = true; | |
756 | } | |
292d1398 | 757 | } |
758 | ||
759 | if (fdb_to_nud(fdb) != state) { | |
145beee8 VY |
760 | if (state & NUD_PERMANENT) { |
761 | fdb->is_local = 1; | |
762 | if (!fdb->is_static) { | |
763 | fdb->is_static = 1; | |
020ec6ba | 764 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
765 | } |
766 | } else if (state & NUD_NOARP) { | |
767 | fdb->is_local = 0; | |
768 | if (!fdb->is_static) { | |
769 | fdb->is_static = 1; | |
020ec6ba | 770 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
771 | } |
772 | } else { | |
292d1398 | 773 | fdb->is_local = 0; |
145beee8 VY |
774 | if (fdb->is_static) { |
775 | fdb->is_static = 0; | |
020ec6ba | 776 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
777 | } |
778 | } | |
64af1bac | 779 | |
b0a397fb | 780 | modified = true; |
781 | } | |
a5642ab4 | 782 | fdb->added_by_user = 1; |
b0a397fb | 783 | |
784 | fdb->used = jiffies; | |
785 | if (modified) { | |
786 | fdb->updated = jiffies; | |
31e8a49c | 787 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 788 | } |
36fd2b63 | 789 | |
36fd2b63 | 790 | return 0; |
791 | } | |
792 | ||
1690be63 VY |
793 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, |
794 | const unsigned char *addr, u16 nlh_flags, u16 vid) | |
795 | { | |
796 | int err = 0; | |
797 | ||
798 | if (ndm->ndm_flags & NTF_USE) { | |
799 | rcu_read_lock(); | |
a5642ab4 | 800 | br_fdb_update(p->br, p, addr, vid, true); |
1690be63 VY |
801 | rcu_read_unlock(); |
802 | } else { | |
803 | spin_lock_bh(&p->br->hash_lock); | |
804 | err = fdb_add_entry(p, addr, ndm->ndm_state, | |
805 | nlh_flags, vid); | |
806 | spin_unlock_bh(&p->br->hash_lock); | |
807 | } | |
808 | ||
809 | return err; | |
810 | } | |
811 | ||
36fd2b63 | 812 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 813 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
814 | struct net_device *dev, | |
f6f6424b | 815 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
36fd2b63 | 816 | { |
36fd2b63 | 817 | struct net_bridge_port *p; |
77162022 | 818 | int err = 0; |
1690be63 | 819 | struct net_port_vlans *pv; |
36fd2b63 | 820 | |
292d1398 | 821 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
822 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
823 | return -EINVAL; | |
824 | } | |
825 | ||
537f7f84 SH |
826 | if (is_zero_ether_addr(addr)) { |
827 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
828 | return -EINVAL; | |
829 | } | |
830 | ||
36fd2b63 | 831 | p = br_port_get_rtnl(dev); |
832 | if (p == NULL) { | |
833 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
834 | dev->name); | |
835 | return -EINVAL; | |
836 | } | |
837 | ||
1690be63 | 838 | pv = nbp_get_vlan_info(p); |
f6f6424b | 839 | if (vid) { |
1690be63 VY |
840 | if (!pv || !test_bit(vid, pv->vlan_bitmap)) { |
841 | pr_info("bridge: RTM_NEWNEIGH with unconfigured " | |
842 | "vlan %d on port %s\n", vid, dev->name); | |
843 | return -EINVAL; | |
844 | } | |
845 | ||
846 | /* VID was specified, so use it. */ | |
847 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); | |
292d1398 | 848 | } else { |
25d3b493 TM |
849 | err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); |
850 | if (err || !pv) | |
1690be63 | 851 | goto out; |
1690be63 VY |
852 | |
853 | /* We have vlans configured on this port and user didn't | |
854 | * specify a VLAN. To be nice, add/update entry for every | |
855 | * vlan on this port. | |
856 | */ | |
ef40b7ef | 857 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63 VY |
858 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); |
859 | if (err) | |
860 | goto out; | |
1690be63 | 861 | } |
292d1398 | 862 | } |
36fd2b63 | 863 | |
1690be63 | 864 | out: |
36fd2b63 | 865 | return err; |
866 | } | |
867 | ||
424bb9c9 | 868 | static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vlan) |
36fd2b63 | 869 | { |
1690be63 | 870 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
36fd2b63 | 871 | struct net_bridge_fdb_entry *fdb; |
872 | ||
1690be63 | 873 | fdb = fdb_find(head, addr, vlan); |
36fd2b63 | 874 | if (!fdb) |
875 | return -ENOENT; | |
876 | ||
1690be63 | 877 | fdb_delete(br, fdb); |
36fd2b63 | 878 | return 0; |
879 | } | |
880 | ||
1690be63 VY |
881 | static int __br_fdb_delete(struct net_bridge_port *p, |
882 | const unsigned char *addr, u16 vid) | |
883 | { | |
884 | int err; | |
885 | ||
886 | spin_lock_bh(&p->br->hash_lock); | |
887 | err = fdb_delete_by_addr(p->br, addr, vid); | |
888 | spin_unlock_bh(&p->br->hash_lock); | |
889 | ||
890 | return err; | |
891 | } | |
892 | ||
36fd2b63 | 893 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
894 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
895 | struct net_device *dev, | |
f6f6424b | 896 | const unsigned char *addr, u16 vid) |
36fd2b63 | 897 | { |
36fd2b63 | 898 | struct net_bridge_port *p; |
36fd2b63 | 899 | int err; |
1690be63 | 900 | struct net_port_vlans *pv; |
1690be63 | 901 | |
36fd2b63 | 902 | p = br_port_get_rtnl(dev); |
903 | if (p == NULL) { | |
904 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
905 | dev->name); | |
906 | return -EINVAL; | |
907 | } | |
908 | ||
1690be63 | 909 | pv = nbp_get_vlan_info(p); |
f6f6424b | 910 | if (vid) { |
1690be63 VY |
911 | if (!pv || !test_bit(vid, pv->vlan_bitmap)) { |
912 | pr_info("bridge: RTM_DELNEIGH with unconfigured " | |
913 | "vlan %d on port %s\n", vid, dev->name); | |
914 | return -EINVAL; | |
915 | } | |
36fd2b63 | 916 | |
1690be63 VY |
917 | err = __br_fdb_delete(p, addr, vid); |
918 | } else { | |
25d3b493 TM |
919 | err = -ENOENT; |
920 | err &= __br_fdb_delete(p, addr, 0); | |
921 | if (!pv) | |
1690be63 | 922 | goto out; |
1690be63 VY |
923 | |
924 | /* We have vlans configured on this port and user didn't | |
925 | * specify a VLAN. To be nice, add/update entry for every | |
926 | * vlan on this port. | |
927 | */ | |
ef40b7ef | 928 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63 | 929 | err &= __br_fdb_delete(p, addr, vid); |
1690be63 VY |
930 | } |
931 | } | |
932 | out: | |
36fd2b63 | 933 | return err; |
934 | } | |
8db24af7 VY |
935 | |
936 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
937 | { | |
938 | struct net_bridge_fdb_entry *fdb, *tmp; | |
939 | int i; | |
940 | int err; | |
941 | ||
942 | ASSERT_RTNL(); | |
943 | ||
944 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
945 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
946 | /* We only care for static entries */ | |
947 | if (!fdb->is_static) | |
948 | continue; | |
949 | ||
950 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
951 | if (err) | |
952 | goto rollback; | |
953 | } | |
954 | } | |
955 | return 0; | |
956 | ||
957 | rollback: | |
958 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
959 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
960 | /* If we reached the fdb that failed, we can stop */ | |
961 | if (tmp == fdb) | |
962 | break; | |
963 | ||
964 | /* We only care for static entries */ | |
965 | if (!tmp->is_static) | |
966 | continue; | |
967 | ||
968 | dev_uc_del(p->dev, tmp->addr.addr); | |
969 | } | |
970 | } | |
971 | return err; | |
972 | } | |
973 | ||
974 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
975 | { | |
976 | struct net_bridge_fdb_entry *fdb; | |
977 | int i; | |
978 | ||
979 | ASSERT_RTNL(); | |
980 | ||
981 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
982 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
983 | /* We only care for static entries */ | |
984 | if (!fdb->is_static) | |
985 | continue; | |
986 | ||
987 | dev_uc_del(p->dev, fdb->addr.addr); | |
988 | } | |
989 | } | |
990 | } | |
cf6b8e1e | 991 | |
3aeb6617 | 992 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
993 | const unsigned char *addr, u16 vid) |
994 | { | |
cf6b8e1e SF |
995 | struct hlist_head *head; |
996 | struct net_bridge_fdb_entry *fdb; | |
997 | int err = 0; | |
998 | ||
3aeb6617 | 999 | ASSERT_RTNL(); |
cf6b8e1e SF |
1000 | spin_lock_bh(&br->hash_lock); |
1001 | ||
1002 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1003 | fdb = fdb_find(head, addr, vid); | |
1004 | if (!fdb) { | |
1005 | fdb = fdb_create(head, p, addr, vid); | |
1006 | if (!fdb) { | |
1007 | err = -ENOMEM; | |
1008 | goto err_unlock; | |
1009 | } | |
1010 | fdb->added_by_external_learn = 1; | |
1011 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1012 | } else if (fdb->added_by_external_learn) { | |
1013 | /* Refresh entry */ | |
1014 | fdb->updated = fdb->used = jiffies; | |
1015 | } else if (!fdb->added_by_user) { | |
1016 | /* Take over SW learned entry */ | |
1017 | fdb->added_by_external_learn = 1; | |
1018 | fdb->updated = jiffies; | |
1019 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1020 | } | |
1021 | ||
1022 | err_unlock: | |
1023 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1024 | |
1025 | return err; | |
1026 | } | |
cf6b8e1e | 1027 | |
3aeb6617 | 1028 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1029 | const unsigned char *addr, u16 vid) |
1030 | { | |
cf6b8e1e SF |
1031 | struct hlist_head *head; |
1032 | struct net_bridge_fdb_entry *fdb; | |
1033 | int err = 0; | |
1034 | ||
3aeb6617 | 1035 | ASSERT_RTNL(); |
cf6b8e1e SF |
1036 | spin_lock_bh(&br->hash_lock); |
1037 | ||
1038 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1039 | fdb = fdb_find(head, addr, vid); | |
1040 | if (fdb && fdb->added_by_external_learn) | |
1041 | fdb_delete(br, fdb); | |
1042 | else | |
1043 | err = -ENOENT; | |
1044 | ||
1045 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1046 | |
1047 | return err; | |
1048 | } |