Commit | Line | Data |
---|---|---|
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> |
b4ad7baa | 27 | #include <net/switchdev.h> |
1da177e4 LT |
28 | #include "br_private.h" |
29 | ||
e18b890b | 30 | static struct kmem_cache *br_fdb_cache __read_mostly; |
424bb9c9 TM |
31 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
32 | const unsigned char *addr, | |
33 | __u16 vid); | |
1da177e4 | 34 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 35 | const unsigned char *addr, u16 vid); |
31e8a49c | 36 | static void fdb_notify(struct net_bridge *br, |
37 | const struct net_bridge_fdb_entry *, int); | |
1da177e4 | 38 | |
3f890923 SH |
39 | static u32 fdb_salt __read_mostly; |
40 | ||
87a596e0 | 41 | int __init br_fdb_init(void) |
1da177e4 LT |
42 | { |
43 | br_fdb_cache = kmem_cache_create("bridge_fdb_cache", | |
44 | sizeof(struct net_bridge_fdb_entry), | |
45 | 0, | |
20c2df83 | 46 | SLAB_HWCACHE_ALIGN, NULL); |
87a596e0 AM |
47 | if (!br_fdb_cache) |
48 | return -ENOMEM; | |
49 | ||
3f890923 | 50 | get_random_bytes(&fdb_salt, sizeof(fdb_salt)); |
87a596e0 | 51 | return 0; |
1da177e4 LT |
52 | } |
53 | ||
73afc906 | 54 | void br_fdb_fini(void) |
1da177e4 LT |
55 | { |
56 | kmem_cache_destroy(br_fdb_cache); | |
57 | } | |
58 | ||
59 | ||
60 | /* if topology_changing then use forward_delay (default 15 sec) | |
61 | * otherwise keep longer (default 5 minutes) | |
62 | */ | |
3f890923 | 63 | static inline unsigned long hold_time(const struct net_bridge *br) |
1da177e4 LT |
64 | { |
65 | return br->topology_change ? br->forward_delay : br->ageing_time; | |
66 | } | |
67 | ||
3f890923 | 68 | static inline int has_expired(const struct net_bridge *br, |
1da177e4 LT |
69 | const struct net_bridge_fdb_entry *fdb) |
70 | { | |
f64f9e71 | 71 | return !fdb->is_static && |
7cd8861a | 72 | time_before_eq(fdb->updated + hold_time(br), jiffies); |
1da177e4 LT |
73 | } |
74 | ||
2ba071ec | 75 | static inline int br_mac_hash(const unsigned char *mac, __u16 vid) |
1da177e4 | 76 | { |
2ba071ec | 77 | /* use 1 byte of OUI and 3 bytes of NIC */ |
3f890923 | 78 | u32 key = get_unaligned((u32 *)(mac + 2)); |
2ba071ec | 79 | return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); |
1da177e4 LT |
80 | } |
81 | ||
da678292 MM |
82 | static void fdb_rcu_free(struct rcu_head *head) |
83 | { | |
84 | struct net_bridge_fdb_entry *ent | |
85 | = container_of(head, struct net_bridge_fdb_entry, rcu); | |
86 | kmem_cache_free(br_fdb_cache, ent); | |
87 | } | |
88 | ||
145beee8 VY |
89 | /* When a static FDB entry is added, the mac address from the entry is |
90 | * added to the bridge private HW address list and all required ports | |
91 | * are then updated with the new information. | |
92 | * Called under RTNL. | |
93 | */ | |
020ec6ba | 94 | static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
95 | { |
96 | int err; | |
a3f5ee71 | 97 | struct net_bridge_port *p; |
145beee8 VY |
98 | |
99 | ASSERT_RTNL(); | |
100 | ||
101 | list_for_each_entry(p, &br->port_list, list) { | |
102 | if (!br_promisc_port(p)) { | |
103 | err = dev_uc_add(p->dev, addr); | |
104 | if (err) | |
105 | goto undo; | |
106 | } | |
107 | } | |
108 | ||
109 | return; | |
110 | undo: | |
a3f5ee71 LR |
111 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
112 | if (!br_promisc_port(p)) | |
113 | dev_uc_del(p->dev, addr); | |
145beee8 VY |
114 | } |
115 | } | |
116 | ||
117 | /* When a static FDB entry is deleted, the HW address from that entry is | |
118 | * also removed from the bridge private HW address list and updates all | |
119 | * the ports with needed information. | |
120 | * Called under RTNL. | |
121 | */ | |
020ec6ba | 122 | static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
123 | { |
124 | struct net_bridge_port *p; | |
125 | ||
126 | ASSERT_RTNL(); | |
127 | ||
128 | list_for_each_entry(p, &br->port_list, list) { | |
129 | if (!br_promisc_port(p)) | |
130 | dev_uc_del(p->dev, addr); | |
131 | } | |
132 | } | |
133 | ||
b4ad7baa SF |
134 | static void fdb_del_external_learn(struct net_bridge_fdb_entry *f) |
135 | { | |
136 | struct switchdev_obj obj = { | |
137 | .id = SWITCHDEV_OBJ_PORT_FDB, | |
138 | .u.fdb = { | |
139 | .addr = f->addr.addr, | |
140 | .vid = f->vlan_id, | |
141 | }, | |
142 | }; | |
143 | ||
144 | switchdev_port_obj_del(f->dst->dev, &obj); | |
145 | } | |
146 | ||
31e8a49c | 147 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
1da177e4 | 148 | { |
145beee8 | 149 | if (f->is_static) |
020ec6ba | 150 | fdb_del_hw_addr(br, f->addr.addr); |
145beee8 | 151 | |
b4ad7baa SF |
152 | if (f->added_by_external_learn) |
153 | fdb_del_external_learn(f); | |
154 | ||
1da177e4 | 155 | hlist_del_rcu(&f->hlist); |
31e8a49c | 156 | fdb_notify(br, f, RTM_DELNEIGH); |
da678292 | 157 | call_rcu(&f->rcu, fdb_rcu_free); |
1da177e4 LT |
158 | } |
159 | ||
960b589f TM |
160 | /* Delete a local entry if no other port had the same address. */ |
161 | static void fdb_delete_local(struct net_bridge *br, | |
162 | const struct net_bridge_port *p, | |
163 | struct net_bridge_fdb_entry *f) | |
164 | { | |
165 | const unsigned char *addr = f->addr.addr; | |
166 | u16 vid = f->vlan_id; | |
167 | struct net_bridge_port *op; | |
168 | ||
169 | /* Maybe another port has same hw addr? */ | |
170 | list_for_each_entry(op, &br->port_list, list) { | |
171 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && | |
172 | (!vid || nbp_vlan_find(op, vid))) { | |
173 | f->dst = op; | |
a778e6d1 | 174 | f->added_by_user = 0; |
960b589f TM |
175 | return; |
176 | } | |
177 | } | |
178 | ||
179 | /* Maybe bridge device has same hw addr? */ | |
180 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
181 | (!vid || br_vlan_find(br, vid))) { | |
182 | f->dst = NULL; | |
a778e6d1 | 183 | f->added_by_user = 0; |
960b589f TM |
184 | return; |
185 | } | |
186 | ||
187 | fdb_delete(br, f); | |
188 | } | |
189 | ||
424bb9c9 TM |
190 | void br_fdb_find_delete_local(struct net_bridge *br, |
191 | const struct net_bridge_port *p, | |
192 | const unsigned char *addr, u16 vid) | |
193 | { | |
194 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
195 | struct net_bridge_fdb_entry *f; | |
196 | ||
197 | spin_lock_bh(&br->hash_lock); | |
198 | f = fdb_find(head, addr, vid); | |
199 | if (f && f->is_local && !f->added_by_user && f->dst == p) | |
200 | fdb_delete_local(br, p, f); | |
201 | spin_unlock_bh(&br->hash_lock); | |
202 | } | |
203 | ||
1da177e4 LT |
204 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
205 | { | |
206 | struct net_bridge *br = p->br; | |
2836882f TM |
207 | struct net_port_vlans *pv = nbp_get_vlan_info(p); |
208 | bool no_vlan = !pv; | |
1da177e4 | 209 | int i; |
2836882f | 210 | u16 vid; |
9d6f229f | 211 | |
1da177e4 LT |
212 | spin_lock_bh(&br->hash_lock); |
213 | ||
214 | /* Search all chains since old address/hash is unknown */ | |
215 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
216 | struct hlist_node *h; | |
217 | hlist_for_each(h, &br->hash[i]) { | |
218 | struct net_bridge_fdb_entry *f; | |
219 | ||
220 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
a5642ab4 | 221 | if (f->dst == p && f->is_local && !f->added_by_user) { |
1da177e4 | 222 | /* delete old one */ |
960b589f TM |
223 | fdb_delete_local(br, p, f); |
224 | ||
bc9a25d2 VY |
225 | /* if this port has no vlan information |
226 | * configured, we can safely be done at | |
227 | * this point. | |
228 | */ | |
229 | if (no_vlan) | |
2836882f | 230 | goto insert; |
1da177e4 LT |
231 | } |
232 | } | |
233 | } | |
1da177e4 | 234 | |
2836882f TM |
235 | insert: |
236 | /* insert new address, may fail if invalid address or dup. */ | |
237 | fdb_insert(br, p, newaddr, 0); | |
238 | ||
239 | if (no_vlan) | |
240 | goto done; | |
241 | ||
242 | /* Now add entries for every VLAN configured on the port. | |
243 | * This function runs under RTNL so the bitmap will not change | |
244 | * from under us. | |
245 | */ | |
246 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) | |
247 | fdb_insert(br, p, newaddr, vid); | |
248 | ||
bc9a25d2 | 249 | done: |
1da177e4 LT |
250 | spin_unlock_bh(&br->hash_lock); |
251 | } | |
252 | ||
43598813 | 253 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
254 | { | |
255 | struct net_bridge_fdb_entry *f; | |
bc9a25d2 VY |
256 | struct net_port_vlans *pv; |
257 | u16 vid = 0; | |
43598813 | 258 | |
ac4c8868 TM |
259 | spin_lock_bh(&br->hash_lock); |
260 | ||
43598813 | 261 | /* If old entry was unassociated with any port, then delete it. */ |
2ba071ec | 262 | f = __br_fdb_get(br, br->dev->dev_addr, 0); |
43598813 | 263 | if (f && f->is_local && !f->dst) |
960b589f | 264 | fdb_delete_local(br, NULL, f); |
43598813 | 265 | |
bc9a25d2 VY |
266 | fdb_insert(br, NULL, newaddr, 0); |
267 | ||
268 | /* Now remove and add entries for every VLAN configured on the | |
269 | * bridge. This function runs under RTNL so the bitmap will not | |
270 | * change from under us. | |
271 | */ | |
272 | pv = br_get_vlan_info(br); | |
273 | if (!pv) | |
ac4c8868 | 274 | goto out; |
bc9a25d2 | 275 | |
ef40b7ef | 276 | for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) { |
bc9a25d2 VY |
277 | f = __br_fdb_get(br, br->dev->dev_addr, vid); |
278 | if (f && f->is_local && !f->dst) | |
960b589f | 279 | fdb_delete_local(br, NULL, f); |
bc9a25d2 VY |
280 | fdb_insert(br, NULL, newaddr, vid); |
281 | } | |
ac4c8868 TM |
282 | out: |
283 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 284 | } |
285 | ||
1da177e4 LT |
286 | void br_fdb_cleanup(unsigned long _data) |
287 | { | |
288 | struct net_bridge *br = (struct net_bridge *)_data; | |
289 | unsigned long delay = hold_time(br); | |
25442e06 | 290 | unsigned long next_timer = jiffies + br->ageing_time; |
1da177e4 LT |
291 | int i; |
292 | ||
27a42938 | 293 | spin_lock(&br->hash_lock); |
1da177e4 LT |
294 | for (i = 0; i < BR_HASH_SIZE; i++) { |
295 | struct net_bridge_fdb_entry *f; | |
b67bfe0d | 296 | struct hlist_node *n; |
1da177e4 | 297 | |
b67bfe0d | 298 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
071f7722 | 299 | unsigned long this_timer; |
3fcf9011 | 300 | if (f->is_static) |
071f7722 | 301 | continue; |
dcd45e06 SM |
302 | if (f->added_by_external_learn) |
303 | continue; | |
7cd8861a | 304 | this_timer = f->updated + delay; |
071f7722 | 305 | if (time_before_eq(this_timer, jiffies)) |
31e8a49c | 306 | fdb_delete(br, f); |
2bec008c | 307 | else if (time_before(this_timer, next_timer)) |
071f7722 | 308 | next_timer = this_timer; |
1da177e4 LT |
309 | } |
310 | } | |
27a42938 | 311 | spin_unlock(&br->hash_lock); |
1da177e4 | 312 | |
25442e06 | 313 | mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
1da177e4 LT |
314 | } |
315 | ||
9cf63747 SH |
316 | /* Completely flush all dynamic entries in forwarding database.*/ |
317 | void br_fdb_flush(struct net_bridge *br) | |
318 | { | |
319 | int i; | |
320 | ||
321 | spin_lock_bh(&br->hash_lock); | |
322 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
323 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
324 | struct hlist_node *n; |
325 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 326 | if (!f->is_static) |
31e8a49c | 327 | fdb_delete(br, f); |
9cf63747 SH |
328 | } |
329 | } | |
330 | spin_unlock_bh(&br->hash_lock); | |
331 | } | |
1a620698 | 332 | |
25985edc | 333 | /* Flush all entries referring to a specific port. |
9cf63747 | 334 | * if do_all is set also flush static entries |
1ea2d020 | 335 | * if vid is set delete all entries that match the vlan_id |
9cf63747 | 336 | */ |
1a620698 SH |
337 | void br_fdb_delete_by_port(struct net_bridge *br, |
338 | const struct net_bridge_port *p, | |
1ea2d020 | 339 | u16 vid, |
1a620698 | 340 | int do_all) |
1da177e4 LT |
341 | { |
342 | int i; | |
343 | ||
344 | spin_lock_bh(&br->hash_lock); | |
345 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
346 | struct hlist_node *h, *g; | |
9d6f229f | 347 | |
1da177e4 LT |
348 | hlist_for_each_safe(h, g, &br->hash[i]) { |
349 | struct net_bridge_fdb_entry *f | |
350 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 351 | if (f->dst != p) |
1da177e4 LT |
352 | continue; |
353 | ||
1ea2d020 NA |
354 | if (!do_all) |
355 | if (f->is_static || (vid && f->vlan_id != vid)) | |
356 | continue; | |
1da177e4 | 357 | |
a778e6d1 TM |
358 | if (f->is_local) |
359 | fdb_delete_local(br, p, f); | |
360 | else | |
361 | fdb_delete(br, f); | |
1da177e4 LT |
362 | } |
363 | } | |
364 | spin_unlock_bh(&br->hash_lock); | |
365 | } | |
366 | ||
eeaf61d8 | 367 | /* No locking or refcounting, assumes caller has rcu_read_lock */ |
1da177e4 | 368 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
2ba071ec VY |
369 | const unsigned char *addr, |
370 | __u16 vid) | |
1da177e4 | 371 | { |
1da177e4 LT |
372 | struct net_bridge_fdb_entry *fdb; |
373 | ||
b67bfe0d | 374 | hlist_for_each_entry_rcu(fdb, |
2ba071ec VY |
375 | &br->hash[br_mac_hash(addr, vid)], hlist) { |
376 | if (ether_addr_equal(fdb->addr.addr, addr) && | |
377 | fdb->vlan_id == vid) { | |
1da177e4 LT |
378 | if (unlikely(has_expired(br, fdb))) |
379 | break; | |
380 | return fdb; | |
381 | } | |
382 | } | |
383 | ||
384 | return NULL; | |
385 | } | |
386 | ||
e6373c4c | 387 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
388 | /* Interface used by ATM LANE hook to test |
389 | * if an addr is on some other bridge port */ | |
390 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
391 | { |
392 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 393 | struct net_bridge_port *port; |
da678292 MM |
394 | int ret; |
395 | ||
1da177e4 | 396 | rcu_read_lock(); |
b5ed54e9 | 397 | port = br_port_get_rcu(dev); |
398 | if (!port) | |
399 | ret = 0; | |
400 | else { | |
2ba071ec | 401 | fdb = __br_fdb_get(port->br, addr, 0); |
43598813 | 402 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 403 | fdb->dst->state == BR_STATE_FORWARDING; |
404 | } | |
1da177e4 | 405 | rcu_read_unlock(); |
1da177e4 | 406 | |
da678292 | 407 | return ret; |
1da177e4 | 408 | } |
da678292 | 409 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
410 | |
411 | /* | |
9d6f229f | 412 | * Fill buffer with forwarding table records in |
1da177e4 LT |
413 | * the API format. |
414 | */ | |
415 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
416 | unsigned long maxnum, unsigned long skip) | |
417 | { | |
418 | struct __fdb_entry *fe = buf; | |
419 | int i, num = 0; | |
1da177e4 LT |
420 | struct net_bridge_fdb_entry *f; |
421 | ||
422 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
423 | ||
424 | rcu_read_lock(); | |
425 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 426 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
427 | if (num >= maxnum) |
428 | goto out; | |
429 | ||
9d6f229f | 430 | if (has_expired(br, f)) |
1da177e4 LT |
431 | continue; |
432 | ||
43598813 | 433 | /* ignore pseudo entry for local MAC address */ |
434 | if (!f->dst) | |
435 | continue; | |
436 | ||
1da177e4 LT |
437 | if (skip) { |
438 | --skip; | |
439 | continue; | |
440 | } | |
441 | ||
442 | /* convert from internal format to API */ | |
443 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
444 | |
445 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 446 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
447 | fe->port_hi = f->dst->port_no >> 8; |
448 | ||
1da177e4 LT |
449 | fe->is_local = f->is_local; |
450 | if (!f->is_static) | |
a399a805 | 451 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
452 | ++fe; |
453 | ++num; | |
454 | } | |
455 | } | |
456 | ||
457 | out: | |
458 | rcu_read_unlock(); | |
459 | ||
460 | return num; | |
461 | } | |
462 | ||
664de48b | 463 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
2ba071ec VY |
464 | const unsigned char *addr, |
465 | __u16 vid) | |
664de48b | 466 | { |
664de48b | 467 | struct net_bridge_fdb_entry *fdb; |
468 | ||
b67bfe0d | 469 | hlist_for_each_entry(fdb, head, hlist) { |
2ba071ec VY |
470 | if (ether_addr_equal(fdb->addr.addr, addr) && |
471 | fdb->vlan_id == vid) | |
664de48b | 472 | return fdb; |
473 | } | |
474 | return NULL; | |
475 | } | |
476 | ||
477 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, | |
2ba071ec VY |
478 | const unsigned char *addr, |
479 | __u16 vid) | |
1da177e4 | 480 | { |
1da177e4 LT |
481 | struct net_bridge_fdb_entry *fdb; |
482 | ||
b67bfe0d | 483 | hlist_for_each_entry_rcu(fdb, head, hlist) { |
2ba071ec VY |
484 | if (ether_addr_equal(fdb->addr.addr, addr) && |
485 | fdb->vlan_id == vid) | |
1da177e4 LT |
486 | return fdb; |
487 | } | |
488 | return NULL; | |
489 | } | |
490 | ||
491 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, | |
492 | struct net_bridge_port *source, | |
2ba071ec VY |
493 | const unsigned char *addr, |
494 | __u16 vid) | |
1da177e4 LT |
495 | { |
496 | struct net_bridge_fdb_entry *fdb; | |
497 | ||
498 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
499 | if (fdb) { | |
500 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 501 | fdb->dst = source; |
2ba071ec | 502 | fdb->vlan_id = vid; |
03e9b64b | 503 | fdb->is_local = 0; |
504 | fdb->is_static = 0; | |
a5642ab4 | 505 | fdb->added_by_user = 0; |
cf6b8e1e | 506 | fdb->added_by_external_learn = 0; |
7cd8861a | 507 | fdb->updated = fdb->used = jiffies; |
1158f762 | 508 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
509 | } |
510 | return fdb; | |
511 | } | |
512 | ||
513 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 514 | const unsigned char *addr, u16 vid) |
1da177e4 | 515 | { |
bc9a25d2 | 516 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
517 | struct net_bridge_fdb_entry *fdb; |
518 | ||
519 | if (!is_valid_ether_addr(addr)) | |
520 | return -EINVAL; | |
521 | ||
bc9a25d2 | 522 | fdb = fdb_find(head, addr, vid); |
1da177e4 | 523 | if (fdb) { |
9d6f229f | 524 | /* it is okay to have multiple ports with same |
1da177e4 LT |
525 | * address, just use the first one. |
526 | */ | |
9d6f229f | 527 | if (fdb->is_local) |
1da177e4 | 528 | return 0; |
28a16c97 | 529 | br_warn(br, "adding interface %s with same address " |
1da177e4 | 530 | "as a received packet\n", |
9b46922e | 531 | source ? source->dev->name : br->dev->name); |
31e8a49c | 532 | fdb_delete(br, fdb); |
9d6f229f | 533 | } |
1da177e4 | 534 | |
bc9a25d2 | 535 | fdb = fdb_create(head, source, addr, vid); |
03e9b64b | 536 | if (!fdb) |
1da177e4 LT |
537 | return -ENOMEM; |
538 | ||
03e9b64b | 539 | fdb->is_local = fdb->is_static = 1; |
020ec6ba | 540 | fdb_add_hw_addr(br, addr); |
31e8a49c | 541 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
542 | return 0; |
543 | } | |
544 | ||
03e9b64b | 545 | /* Add entry for local address of interface */ |
1da177e4 | 546 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 547 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
548 | { |
549 | int ret; | |
550 | ||
551 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 552 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
553 | spin_unlock_bh(&br->hash_lock); |
554 | return ret; | |
555 | } | |
556 | ||
557 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 558 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 559 | { |
2ba071ec | 560 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 561 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 562 | bool fdb_modified = false; |
1da177e4 LT |
563 | |
564 | /* some users want to always flood. */ | |
565 | if (hold_time(br) == 0) | |
566 | return; | |
567 | ||
df1c0b84 SH |
568 | /* ignore packets unless we are using this port */ |
569 | if (!(source->state == BR_STATE_LEARNING || | |
570 | source->state == BR_STATE_FORWARDING)) | |
571 | return; | |
572 | ||
2ba071ec | 573 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
574 | if (likely(fdb)) { |
575 | /* attempt to update an entry for a local interface */ | |
576 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 577 | if (net_ratelimit()) |
28a16c97 | 578 | br_warn(br, "received packet on %s with " |
579 | "own address as source address\n", | |
580 | source->dev->name); | |
1da177e4 LT |
581 | } else { |
582 | /* fastpath: update of existing entry */ | |
c65c7a30 JM |
583 | if (unlikely(source != fdb->dst)) { |
584 | fdb->dst = source; | |
585 | fdb_modified = true; | |
586 | } | |
7cd8861a | 587 | fdb->updated = jiffies; |
a5642ab4 TM |
588 | if (unlikely(added_by_user)) |
589 | fdb->added_by_user = 1; | |
c65c7a30 JM |
590 | if (unlikely(fdb_modified)) |
591 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1da177e4 LT |
592 | } |
593 | } else { | |
f8ae737d | 594 | spin_lock(&br->hash_lock); |
2ba071ec VY |
595 | if (likely(!fdb_find(head, addr, vid))) { |
596 | fdb = fdb_create(head, source, addr, vid); | |
a5642ab4 TM |
597 | if (fdb) { |
598 | if (unlikely(added_by_user)) | |
599 | fdb->added_by_user = 1; | |
31e8a49c | 600 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 601 | } |
f58ee4e1 | 602 | } |
1da177e4 LT |
603 | /* else we lose race and someone else inserts |
604 | * it first, don't bother updating | |
605 | */ | |
f8ae737d | 606 | spin_unlock(&br->hash_lock); |
1da177e4 | 607 | } |
1da177e4 | 608 | } |
b078f0df | 609 | |
610 | static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb) | |
611 | { | |
612 | if (fdb->is_local) | |
613 | return NUD_PERMANENT; | |
614 | else if (fdb->is_static) | |
615 | return NUD_NOARP; | |
616 | else if (has_expired(fdb->dst->br, fdb)) | |
617 | return NUD_STALE; | |
618 | else | |
619 | return NUD_REACHABLE; | |
620 | } | |
621 | ||
31e8a49c | 622 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 623 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 624 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 625 | { |
626 | unsigned long now = jiffies; | |
627 | struct nda_cacheinfo ci; | |
628 | struct nlmsghdr *nlh; | |
629 | struct ndmsg *ndm; | |
630 | ||
15e47304 | 631 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 632 | if (nlh == NULL) |
633 | return -EMSGSIZE; | |
634 | ||
b078f0df | 635 | ndm = nlmsg_data(nlh); |
636 | ndm->ndm_family = AF_BRIDGE; | |
637 | ndm->ndm_pad1 = 0; | |
638 | ndm->ndm_pad2 = 0; | |
cf6b8e1e | 639 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
b078f0df | 640 | ndm->ndm_type = 0; |
43598813 | 641 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
b078f0df | 642 | ndm->ndm_state = fdb_to_nud(fdb); |
643 | ||
2eb812e6 DM |
644 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
645 | goto nla_put_failure; | |
41c389d7 RP |
646 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
647 | goto nla_put_failure; | |
b078f0df | 648 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
649 | ci.ndm_confirmed = 0; | |
650 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
651 | ci.ndm_refcnt = 0; | |
2eb812e6 DM |
652 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
653 | goto nla_put_failure; | |
1690be63 | 654 | |
47fab41a | 655 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
1690be63 VY |
656 | goto nla_put_failure; |
657 | ||
053c095a JB |
658 | nlmsg_end(skb, nlh); |
659 | return 0; | |
b078f0df | 660 | |
661 | nla_put_failure: | |
662 | nlmsg_cancel(skb, nlh); | |
663 | return -EMSGSIZE; | |
664 | } | |
665 | ||
666 | static inline size_t fdb_nlmsg_size(void) | |
667 | { | |
668 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
669 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
41c389d7 | 670 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
1690be63 | 671 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df | 672 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
673 | } | |
674 | ||
31e8a49c | 675 | static void fdb_notify(struct net_bridge *br, |
676 | const struct net_bridge_fdb_entry *fdb, int type) | |
b078f0df | 677 | { |
31e8a49c | 678 | struct net *net = dev_net(br->dev); |
b078f0df | 679 | struct sk_buff *skb; |
680 | int err = -ENOBUFS; | |
681 | ||
682 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
683 | if (skb == NULL) | |
684 | goto errout; | |
685 | ||
31e8a49c | 686 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 687 | if (err < 0) { |
688 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
689 | WARN_ON(err == -EMSGSIZE); | |
690 | kfree_skb(skb); | |
691 | goto errout; | |
692 | } | |
693 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
694 | return; | |
695 | errout: | |
87e823b3 | 696 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 697 | } |
698 | ||
699 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
700 | int br_fdb_dump(struct sk_buff *skb, |
701 | struct netlink_callback *cb, | |
702 | struct net_device *dev, | |
5d5eacb3 | 703 | struct net_device *filter_dev, |
77162022 | 704 | int idx) |
b078f0df | 705 | { |
77162022 JF |
706 | struct net_bridge *br = netdev_priv(dev); |
707 | int i; | |
b078f0df | 708 | |
77162022 JF |
709 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
710 | goto out; | |
b078f0df | 711 | |
6cb69742 HS |
712 | if (!filter_dev) |
713 | idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
714 | ||
77162022 | 715 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 716 | struct net_bridge_fdb_entry *f; |
b078f0df | 717 | |
b67bfe0d | 718 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
77162022 JF |
719 | if (idx < cb->args[0]) |
720 | goto skip; | |
721 | ||
5e6d2435 JHS |
722 | if (filter_dev && |
723 | (!f->dst || f->dst->dev != filter_dev)) { | |
724 | if (filter_dev != dev) | |
725 | goto skip; | |
6cb69742 | 726 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
727 | * It means the MAC belongs to the bridge |
728 | * Therefore need a little more filtering | |
729 | * we only want to dump the !f->dst case | |
730 | */ | |
731 | if (f->dst) | |
732 | goto skip; | |
733 | } | |
6cb69742 HS |
734 | if (!filter_dev && f->dst) |
735 | goto skip; | |
5d5eacb3 | 736 | |
77162022 | 737 | if (fdb_fill_info(skb, br, f, |
15e47304 | 738 | NETLINK_CB(cb->skb).portid, |
77162022 JF |
739 | cb->nlh->nlmsg_seq, |
740 | RTM_NEWNEIGH, | |
741 | NLM_F_MULTI) < 0) | |
742 | break; | |
b078f0df | 743 | skip: |
77162022 | 744 | ++idx; |
b078f0df | 745 | } |
746 | } | |
b078f0df | 747 | |
77162022 JF |
748 | out: |
749 | return idx; | |
b078f0df | 750 | } |
36fd2b63 | 751 | |
292d1398 | 752 | /* Update (create or replace) forwarding database entry */ |
36fd2b63 | 753 | static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, |
2ba071ec | 754 | __u16 state, __u16 flags, __u16 vid) |
36fd2b63 | 755 | { |
756 | struct net_bridge *br = source->br; | |
2ba071ec | 757 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 758 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 759 | bool modified = false; |
36fd2b63 | 760 | |
eb8d7baa WK |
761 | /* If the port cannot learn allow only local and static entries */ |
762 | if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) && | |
763 | !(source->state == BR_STATE_LEARNING || | |
764 | source->state == BR_STATE_FORWARDING)) | |
765 | return -EPERM; | |
766 | ||
2ba071ec | 767 | fdb = fdb_find(head, addr, vid); |
64af1bac | 768 | if (fdb == NULL) { |
769 | if (!(flags & NLM_F_CREATE)) | |
770 | return -ENOENT; | |
36fd2b63 | 771 | |
2ba071ec | 772 | fdb = fdb_create(head, source, addr, vid); |
64af1bac | 773 | if (!fdb) |
774 | return -ENOMEM; | |
b0a397fb | 775 | |
776 | modified = true; | |
64af1bac | 777 | } else { |
778 | if (flags & NLM_F_EXCL) | |
779 | return -EEXIST; | |
b0a397fb | 780 | |
781 | if (fdb->dst != source) { | |
782 | fdb->dst = source; | |
783 | modified = true; | |
784 | } | |
292d1398 | 785 | } |
786 | ||
787 | if (fdb_to_nud(fdb) != state) { | |
145beee8 VY |
788 | if (state & NUD_PERMANENT) { |
789 | fdb->is_local = 1; | |
790 | if (!fdb->is_static) { | |
791 | fdb->is_static = 1; | |
020ec6ba | 792 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
793 | } |
794 | } else if (state & NUD_NOARP) { | |
795 | fdb->is_local = 0; | |
796 | if (!fdb->is_static) { | |
797 | fdb->is_static = 1; | |
020ec6ba | 798 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
799 | } |
800 | } else { | |
292d1398 | 801 | fdb->is_local = 0; |
145beee8 VY |
802 | if (fdb->is_static) { |
803 | fdb->is_static = 0; | |
020ec6ba | 804 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
805 | } |
806 | } | |
64af1bac | 807 | |
b0a397fb | 808 | modified = true; |
809 | } | |
a5642ab4 | 810 | fdb->added_by_user = 1; |
b0a397fb | 811 | |
812 | fdb->used = jiffies; | |
813 | if (modified) { | |
814 | fdb->updated = jiffies; | |
31e8a49c | 815 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 816 | } |
36fd2b63 | 817 | |
36fd2b63 | 818 | return 0; |
819 | } | |
820 | ||
1690be63 VY |
821 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, |
822 | const unsigned char *addr, u16 nlh_flags, u16 vid) | |
823 | { | |
824 | int err = 0; | |
825 | ||
826 | if (ndm->ndm_flags & NTF_USE) { | |
c4c832f8 | 827 | local_bh_disable(); |
1690be63 | 828 | rcu_read_lock(); |
a5642ab4 | 829 | br_fdb_update(p->br, p, addr, vid, true); |
1690be63 | 830 | rcu_read_unlock(); |
c4c832f8 | 831 | local_bh_enable(); |
1690be63 VY |
832 | } else { |
833 | spin_lock_bh(&p->br->hash_lock); | |
834 | err = fdb_add_entry(p, addr, ndm->ndm_state, | |
835 | nlh_flags, vid); | |
836 | spin_unlock_bh(&p->br->hash_lock); | |
837 | } | |
838 | ||
839 | return err; | |
840 | } | |
841 | ||
36fd2b63 | 842 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 843 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
844 | struct net_device *dev, | |
f6f6424b | 845 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
36fd2b63 | 846 | { |
36fd2b63 | 847 | struct net_bridge_port *p; |
77162022 | 848 | int err = 0; |
1690be63 | 849 | struct net_port_vlans *pv; |
36fd2b63 | 850 | |
292d1398 | 851 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
852 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
853 | return -EINVAL; | |
854 | } | |
855 | ||
537f7f84 SH |
856 | if (is_zero_ether_addr(addr)) { |
857 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
858 | return -EINVAL; | |
859 | } | |
860 | ||
36fd2b63 | 861 | p = br_port_get_rtnl(dev); |
862 | if (p == NULL) { | |
863 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
864 | dev->name); | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
1690be63 | 868 | pv = nbp_get_vlan_info(p); |
f6f6424b | 869 | if (vid) { |
1690be63 VY |
870 | if (!pv || !test_bit(vid, pv->vlan_bitmap)) { |
871 | pr_info("bridge: RTM_NEWNEIGH with unconfigured " | |
872 | "vlan %d on port %s\n", vid, dev->name); | |
873 | return -EINVAL; | |
874 | } | |
875 | ||
876 | /* VID was specified, so use it. */ | |
877 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); | |
292d1398 | 878 | } else { |
25d3b493 TM |
879 | err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); |
880 | if (err || !pv) | |
1690be63 | 881 | goto out; |
1690be63 VY |
882 | |
883 | /* We have vlans configured on this port and user didn't | |
884 | * specify a VLAN. To be nice, add/update entry for every | |
885 | * vlan on this port. | |
886 | */ | |
ef40b7ef | 887 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63 VY |
888 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); |
889 | if (err) | |
890 | goto out; | |
1690be63 | 891 | } |
292d1398 | 892 | } |
36fd2b63 | 893 | |
1690be63 | 894 | out: |
36fd2b63 | 895 | return err; |
896 | } | |
897 | ||
8c86f967 NA |
898 | static int fdb_delete_by_addr_and_port(struct net_bridge_port *p, |
899 | const u8 *addr, u16 vlan) | |
36fd2b63 | 900 | { |
8c86f967 | 901 | struct net_bridge *br = p->br; |
1690be63 | 902 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
36fd2b63 | 903 | struct net_bridge_fdb_entry *fdb; |
904 | ||
1690be63 | 905 | fdb = fdb_find(head, addr, vlan); |
8c86f967 | 906 | if (!fdb || fdb->dst != p) |
36fd2b63 | 907 | return -ENOENT; |
908 | ||
1690be63 | 909 | fdb_delete(br, fdb); |
36fd2b63 | 910 | return 0; |
911 | } | |
912 | ||
1690be63 VY |
913 | static int __br_fdb_delete(struct net_bridge_port *p, |
914 | const unsigned char *addr, u16 vid) | |
915 | { | |
916 | int err; | |
917 | ||
918 | spin_lock_bh(&p->br->hash_lock); | |
8c86f967 | 919 | err = fdb_delete_by_addr_and_port(p, addr, vid); |
1690be63 VY |
920 | spin_unlock_bh(&p->br->hash_lock); |
921 | ||
922 | return err; | |
923 | } | |
924 | ||
36fd2b63 | 925 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
926 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
927 | struct net_device *dev, | |
f6f6424b | 928 | const unsigned char *addr, u16 vid) |
36fd2b63 | 929 | { |
36fd2b63 | 930 | struct net_bridge_port *p; |
36fd2b63 | 931 | int err; |
1690be63 | 932 | struct net_port_vlans *pv; |
1690be63 | 933 | |
36fd2b63 | 934 | p = br_port_get_rtnl(dev); |
935 | if (p == NULL) { | |
936 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
937 | dev->name); | |
938 | return -EINVAL; | |
939 | } | |
940 | ||
1690be63 | 941 | pv = nbp_get_vlan_info(p); |
f6f6424b | 942 | if (vid) { |
1690be63 VY |
943 | if (!pv || !test_bit(vid, pv->vlan_bitmap)) { |
944 | pr_info("bridge: RTM_DELNEIGH with unconfigured " | |
945 | "vlan %d on port %s\n", vid, dev->name); | |
946 | return -EINVAL; | |
947 | } | |
36fd2b63 | 948 | |
1690be63 VY |
949 | err = __br_fdb_delete(p, addr, vid); |
950 | } else { | |
25d3b493 TM |
951 | err = -ENOENT; |
952 | err &= __br_fdb_delete(p, addr, 0); | |
953 | if (!pv) | |
1690be63 | 954 | goto out; |
1690be63 VY |
955 | |
956 | /* We have vlans configured on this port and user didn't | |
957 | * specify a VLAN. To be nice, add/update entry for every | |
958 | * vlan on this port. | |
959 | */ | |
ef40b7ef | 960 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63 | 961 | err &= __br_fdb_delete(p, addr, vid); |
1690be63 VY |
962 | } |
963 | } | |
964 | out: | |
36fd2b63 | 965 | return err; |
966 | } | |
8db24af7 VY |
967 | |
968 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
969 | { | |
970 | struct net_bridge_fdb_entry *fdb, *tmp; | |
971 | int i; | |
972 | int err; | |
973 | ||
974 | ASSERT_RTNL(); | |
975 | ||
976 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
977 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
978 | /* We only care for static entries */ | |
979 | if (!fdb->is_static) | |
980 | continue; | |
981 | ||
982 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
983 | if (err) | |
984 | goto rollback; | |
985 | } | |
986 | } | |
987 | return 0; | |
988 | ||
989 | rollback: | |
990 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
991 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
992 | /* If we reached the fdb that failed, we can stop */ | |
993 | if (tmp == fdb) | |
994 | break; | |
995 | ||
996 | /* We only care for static entries */ | |
997 | if (!tmp->is_static) | |
998 | continue; | |
999 | ||
1000 | dev_uc_del(p->dev, tmp->addr.addr); | |
1001 | } | |
1002 | } | |
1003 | return err; | |
1004 | } | |
1005 | ||
1006 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1007 | { | |
1008 | struct net_bridge_fdb_entry *fdb; | |
1009 | int i; | |
1010 | ||
1011 | ASSERT_RTNL(); | |
1012 | ||
1013 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1014 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
1015 | /* We only care for static entries */ | |
1016 | if (!fdb->is_static) | |
1017 | continue; | |
1018 | ||
1019 | dev_uc_del(p->dev, fdb->addr.addr); | |
1020 | } | |
1021 | } | |
1022 | } | |
cf6b8e1e | 1023 | |
3aeb6617 | 1024 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1025 | const unsigned char *addr, u16 vid) |
1026 | { | |
cf6b8e1e SF |
1027 | struct hlist_head *head; |
1028 | struct net_bridge_fdb_entry *fdb; | |
1029 | int err = 0; | |
1030 | ||
3aeb6617 | 1031 | ASSERT_RTNL(); |
cf6b8e1e SF |
1032 | spin_lock_bh(&br->hash_lock); |
1033 | ||
1034 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1035 | fdb = fdb_find(head, addr, vid); | |
1036 | if (!fdb) { | |
1037 | fdb = fdb_create(head, p, addr, vid); | |
1038 | if (!fdb) { | |
1039 | err = -ENOMEM; | |
1040 | goto err_unlock; | |
1041 | } | |
1042 | fdb->added_by_external_learn = 1; | |
1043 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1044 | } else if (fdb->added_by_external_learn) { | |
1045 | /* Refresh entry */ | |
1046 | fdb->updated = fdb->used = jiffies; | |
1047 | } else if (!fdb->added_by_user) { | |
1048 | /* Take over SW learned entry */ | |
1049 | fdb->added_by_external_learn = 1; | |
1050 | fdb->updated = jiffies; | |
1051 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1052 | } | |
1053 | ||
1054 | err_unlock: | |
1055 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1056 | |
1057 | return err; | |
1058 | } | |
cf6b8e1e | 1059 | |
3aeb6617 | 1060 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1061 | const unsigned char *addr, u16 vid) |
1062 | { | |
cf6b8e1e SF |
1063 | struct hlist_head *head; |
1064 | struct net_bridge_fdb_entry *fdb; | |
1065 | int err = 0; | |
1066 | ||
3aeb6617 | 1067 | ASSERT_RTNL(); |
cf6b8e1e SF |
1068 | spin_lock_bh(&br->hash_lock); |
1069 | ||
1070 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1071 | fdb = fdb_find(head, addr, vid); | |
1072 | if (fdb && fdb->added_by_external_learn) | |
1073 | fdb_delete(br, fdb); | |
1074 | else | |
1075 | err = -ENOENT; | |
1076 | ||
1077 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1078 | |
1079 | return err; | |
1080 | } |