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; |
7cd8861a | 302 | this_timer = f->updated + delay; |
071f7722 | 303 | if (time_before_eq(this_timer, jiffies)) |
31e8a49c | 304 | fdb_delete(br, f); |
2bec008c | 305 | else if (time_before(this_timer, next_timer)) |
071f7722 | 306 | next_timer = this_timer; |
1da177e4 LT |
307 | } |
308 | } | |
27a42938 | 309 | spin_unlock(&br->hash_lock); |
1da177e4 | 310 | |
25442e06 | 311 | mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
1da177e4 LT |
312 | } |
313 | ||
9cf63747 SH |
314 | /* Completely flush all dynamic entries in forwarding database.*/ |
315 | void br_fdb_flush(struct net_bridge *br) | |
316 | { | |
317 | int i; | |
318 | ||
319 | spin_lock_bh(&br->hash_lock); | |
320 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
321 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
322 | struct hlist_node *n; |
323 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 324 | if (!f->is_static) |
31e8a49c | 325 | fdb_delete(br, f); |
9cf63747 SH |
326 | } |
327 | } | |
328 | spin_unlock_bh(&br->hash_lock); | |
329 | } | |
1a620698 | 330 | |
25985edc | 331 | /* Flush all entries referring to a specific port. |
9cf63747 SH |
332 | * if do_all is set also flush static entries |
333 | */ | |
1a620698 SH |
334 | void br_fdb_delete_by_port(struct net_bridge *br, |
335 | const struct net_bridge_port *p, | |
336 | int do_all) | |
1da177e4 LT |
337 | { |
338 | int i; | |
339 | ||
340 | spin_lock_bh(&br->hash_lock); | |
341 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
342 | struct hlist_node *h, *g; | |
9d6f229f | 343 | |
1da177e4 LT |
344 | hlist_for_each_safe(h, g, &br->hash[i]) { |
345 | struct net_bridge_fdb_entry *f | |
346 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 347 | if (f->dst != p) |
1da177e4 LT |
348 | continue; |
349 | ||
1a620698 SH |
350 | if (f->is_static && !do_all) |
351 | continue; | |
1da177e4 | 352 | |
a778e6d1 TM |
353 | if (f->is_local) |
354 | fdb_delete_local(br, p, f); | |
355 | else | |
356 | fdb_delete(br, f); | |
1da177e4 LT |
357 | } |
358 | } | |
359 | spin_unlock_bh(&br->hash_lock); | |
360 | } | |
361 | ||
eeaf61d8 | 362 | /* No locking or refcounting, assumes caller has rcu_read_lock */ |
1da177e4 | 363 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
2ba071ec VY |
364 | const unsigned char *addr, |
365 | __u16 vid) | |
1da177e4 | 366 | { |
1da177e4 LT |
367 | struct net_bridge_fdb_entry *fdb; |
368 | ||
b67bfe0d | 369 | hlist_for_each_entry_rcu(fdb, |
2ba071ec VY |
370 | &br->hash[br_mac_hash(addr, vid)], hlist) { |
371 | if (ether_addr_equal(fdb->addr.addr, addr) && | |
372 | fdb->vlan_id == vid) { | |
1da177e4 LT |
373 | if (unlikely(has_expired(br, fdb))) |
374 | break; | |
375 | return fdb; | |
376 | } | |
377 | } | |
378 | ||
379 | return NULL; | |
380 | } | |
381 | ||
e6373c4c | 382 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
383 | /* Interface used by ATM LANE hook to test |
384 | * if an addr is on some other bridge port */ | |
385 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
386 | { |
387 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 388 | struct net_bridge_port *port; |
da678292 MM |
389 | int ret; |
390 | ||
1da177e4 | 391 | rcu_read_lock(); |
b5ed54e9 | 392 | port = br_port_get_rcu(dev); |
393 | if (!port) | |
394 | ret = 0; | |
395 | else { | |
2ba071ec | 396 | fdb = __br_fdb_get(port->br, addr, 0); |
43598813 | 397 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 398 | fdb->dst->state == BR_STATE_FORWARDING; |
399 | } | |
1da177e4 | 400 | rcu_read_unlock(); |
1da177e4 | 401 | |
da678292 | 402 | return ret; |
1da177e4 | 403 | } |
da678292 | 404 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
405 | |
406 | /* | |
9d6f229f | 407 | * Fill buffer with forwarding table records in |
1da177e4 LT |
408 | * the API format. |
409 | */ | |
410 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
411 | unsigned long maxnum, unsigned long skip) | |
412 | { | |
413 | struct __fdb_entry *fe = buf; | |
414 | int i, num = 0; | |
1da177e4 LT |
415 | struct net_bridge_fdb_entry *f; |
416 | ||
417 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
418 | ||
419 | rcu_read_lock(); | |
420 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 421 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
422 | if (num >= maxnum) |
423 | goto out; | |
424 | ||
9d6f229f | 425 | if (has_expired(br, f)) |
1da177e4 LT |
426 | continue; |
427 | ||
43598813 | 428 | /* ignore pseudo entry for local MAC address */ |
429 | if (!f->dst) | |
430 | continue; | |
431 | ||
1da177e4 LT |
432 | if (skip) { |
433 | --skip; | |
434 | continue; | |
435 | } | |
436 | ||
437 | /* convert from internal format to API */ | |
438 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
439 | |
440 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 441 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
442 | fe->port_hi = f->dst->port_no >> 8; |
443 | ||
1da177e4 LT |
444 | fe->is_local = f->is_local; |
445 | if (!f->is_static) | |
a399a805 | 446 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
447 | ++fe; |
448 | ++num; | |
449 | } | |
450 | } | |
451 | ||
452 | out: | |
453 | rcu_read_unlock(); | |
454 | ||
455 | return num; | |
456 | } | |
457 | ||
664de48b | 458 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
2ba071ec VY |
459 | const unsigned char *addr, |
460 | __u16 vid) | |
664de48b | 461 | { |
664de48b | 462 | struct net_bridge_fdb_entry *fdb; |
463 | ||
b67bfe0d | 464 | hlist_for_each_entry(fdb, head, hlist) { |
2ba071ec VY |
465 | if (ether_addr_equal(fdb->addr.addr, addr) && |
466 | fdb->vlan_id == vid) | |
664de48b | 467 | return fdb; |
468 | } | |
469 | return NULL; | |
470 | } | |
471 | ||
472 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, | |
2ba071ec VY |
473 | const unsigned char *addr, |
474 | __u16 vid) | |
1da177e4 | 475 | { |
1da177e4 LT |
476 | struct net_bridge_fdb_entry *fdb; |
477 | ||
b67bfe0d | 478 | hlist_for_each_entry_rcu(fdb, head, hlist) { |
2ba071ec VY |
479 | if (ether_addr_equal(fdb->addr.addr, addr) && |
480 | fdb->vlan_id == vid) | |
1da177e4 LT |
481 | return fdb; |
482 | } | |
483 | return NULL; | |
484 | } | |
485 | ||
486 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, | |
487 | struct net_bridge_port *source, | |
2ba071ec VY |
488 | const unsigned char *addr, |
489 | __u16 vid) | |
1da177e4 LT |
490 | { |
491 | struct net_bridge_fdb_entry *fdb; | |
492 | ||
493 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
494 | if (fdb) { | |
495 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 496 | fdb->dst = source; |
2ba071ec | 497 | fdb->vlan_id = vid; |
03e9b64b | 498 | fdb->is_local = 0; |
499 | fdb->is_static = 0; | |
a5642ab4 | 500 | fdb->added_by_user = 0; |
cf6b8e1e | 501 | fdb->added_by_external_learn = 0; |
7cd8861a | 502 | fdb->updated = fdb->used = jiffies; |
1158f762 | 503 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
504 | } |
505 | return fdb; | |
506 | } | |
507 | ||
508 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 509 | const unsigned char *addr, u16 vid) |
1da177e4 | 510 | { |
bc9a25d2 | 511 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
512 | struct net_bridge_fdb_entry *fdb; |
513 | ||
514 | if (!is_valid_ether_addr(addr)) | |
515 | return -EINVAL; | |
516 | ||
bc9a25d2 | 517 | fdb = fdb_find(head, addr, vid); |
1da177e4 | 518 | if (fdb) { |
9d6f229f | 519 | /* it is okay to have multiple ports with same |
1da177e4 LT |
520 | * address, just use the first one. |
521 | */ | |
9d6f229f | 522 | if (fdb->is_local) |
1da177e4 | 523 | return 0; |
28a16c97 | 524 | br_warn(br, "adding interface %s with same address " |
1da177e4 | 525 | "as a received packet\n", |
9b46922e | 526 | source ? source->dev->name : br->dev->name); |
31e8a49c | 527 | fdb_delete(br, fdb); |
9d6f229f | 528 | } |
1da177e4 | 529 | |
bc9a25d2 | 530 | fdb = fdb_create(head, source, addr, vid); |
03e9b64b | 531 | if (!fdb) |
1da177e4 LT |
532 | return -ENOMEM; |
533 | ||
03e9b64b | 534 | fdb->is_local = fdb->is_static = 1; |
020ec6ba | 535 | fdb_add_hw_addr(br, addr); |
31e8a49c | 536 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
537 | return 0; |
538 | } | |
539 | ||
03e9b64b | 540 | /* Add entry for local address of interface */ |
1da177e4 | 541 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 542 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
543 | { |
544 | int ret; | |
545 | ||
546 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 547 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
548 | spin_unlock_bh(&br->hash_lock); |
549 | return ret; | |
550 | } | |
551 | ||
552 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 553 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 554 | { |
2ba071ec | 555 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 556 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 557 | bool fdb_modified = false; |
1da177e4 LT |
558 | |
559 | /* some users want to always flood. */ | |
560 | if (hold_time(br) == 0) | |
561 | return; | |
562 | ||
df1c0b84 SH |
563 | /* ignore packets unless we are using this port */ |
564 | if (!(source->state == BR_STATE_LEARNING || | |
565 | source->state == BR_STATE_FORWARDING)) | |
566 | return; | |
567 | ||
2ba071ec | 568 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
569 | if (likely(fdb)) { |
570 | /* attempt to update an entry for a local interface */ | |
571 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 572 | if (net_ratelimit()) |
28a16c97 | 573 | br_warn(br, "received packet on %s with " |
574 | "own address as source address\n", | |
575 | source->dev->name); | |
1da177e4 LT |
576 | } else { |
577 | /* fastpath: update of existing entry */ | |
c65c7a30 JM |
578 | if (unlikely(source != fdb->dst)) { |
579 | fdb->dst = source; | |
580 | fdb_modified = true; | |
581 | } | |
7cd8861a | 582 | fdb->updated = jiffies; |
a5642ab4 TM |
583 | if (unlikely(added_by_user)) |
584 | fdb->added_by_user = 1; | |
c65c7a30 JM |
585 | if (unlikely(fdb_modified)) |
586 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1da177e4 LT |
587 | } |
588 | } else { | |
f8ae737d | 589 | spin_lock(&br->hash_lock); |
2ba071ec VY |
590 | if (likely(!fdb_find(head, addr, vid))) { |
591 | fdb = fdb_create(head, source, addr, vid); | |
a5642ab4 TM |
592 | if (fdb) { |
593 | if (unlikely(added_by_user)) | |
594 | fdb->added_by_user = 1; | |
31e8a49c | 595 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 596 | } |
f58ee4e1 | 597 | } |
1da177e4 LT |
598 | /* else we lose race and someone else inserts |
599 | * it first, don't bother updating | |
600 | */ | |
f8ae737d | 601 | spin_unlock(&br->hash_lock); |
1da177e4 | 602 | } |
1da177e4 | 603 | } |
b078f0df | 604 | |
605 | static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb) | |
606 | { | |
607 | if (fdb->is_local) | |
608 | return NUD_PERMANENT; | |
609 | else if (fdb->is_static) | |
610 | return NUD_NOARP; | |
611 | else if (has_expired(fdb->dst->br, fdb)) | |
612 | return NUD_STALE; | |
613 | else | |
614 | return NUD_REACHABLE; | |
615 | } | |
616 | ||
31e8a49c | 617 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 618 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 619 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 620 | { |
621 | unsigned long now = jiffies; | |
622 | struct nda_cacheinfo ci; | |
623 | struct nlmsghdr *nlh; | |
624 | struct ndmsg *ndm; | |
625 | ||
15e47304 | 626 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 627 | if (nlh == NULL) |
628 | return -EMSGSIZE; | |
629 | ||
b078f0df | 630 | ndm = nlmsg_data(nlh); |
631 | ndm->ndm_family = AF_BRIDGE; | |
632 | ndm->ndm_pad1 = 0; | |
633 | ndm->ndm_pad2 = 0; | |
cf6b8e1e | 634 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
b078f0df | 635 | ndm->ndm_type = 0; |
43598813 | 636 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
b078f0df | 637 | ndm->ndm_state = fdb_to_nud(fdb); |
638 | ||
2eb812e6 DM |
639 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
640 | goto nla_put_failure; | |
41c389d7 RP |
641 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
642 | goto nla_put_failure; | |
b078f0df | 643 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
644 | ci.ndm_confirmed = 0; | |
645 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
646 | ci.ndm_refcnt = 0; | |
2eb812e6 DM |
647 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
648 | goto nla_put_failure; | |
1690be63 | 649 | |
47fab41a | 650 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
1690be63 VY |
651 | goto nla_put_failure; |
652 | ||
053c095a JB |
653 | nlmsg_end(skb, nlh); |
654 | return 0; | |
b078f0df | 655 | |
656 | nla_put_failure: | |
657 | nlmsg_cancel(skb, nlh); | |
658 | return -EMSGSIZE; | |
659 | } | |
660 | ||
661 | static inline size_t fdb_nlmsg_size(void) | |
662 | { | |
663 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
664 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
41c389d7 | 665 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
1690be63 | 666 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df | 667 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
668 | } | |
669 | ||
31e8a49c | 670 | static void fdb_notify(struct net_bridge *br, |
671 | const struct net_bridge_fdb_entry *fdb, int type) | |
b078f0df | 672 | { |
31e8a49c | 673 | struct net *net = dev_net(br->dev); |
b078f0df | 674 | struct sk_buff *skb; |
675 | int err = -ENOBUFS; | |
676 | ||
677 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
678 | if (skb == NULL) | |
679 | goto errout; | |
680 | ||
31e8a49c | 681 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 682 | if (err < 0) { |
683 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
684 | WARN_ON(err == -EMSGSIZE); | |
685 | kfree_skb(skb); | |
686 | goto errout; | |
687 | } | |
688 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
689 | return; | |
690 | errout: | |
87e823b3 | 691 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 692 | } |
693 | ||
694 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
695 | int br_fdb_dump(struct sk_buff *skb, |
696 | struct netlink_callback *cb, | |
697 | struct net_device *dev, | |
5d5eacb3 | 698 | struct net_device *filter_dev, |
77162022 | 699 | int idx) |
b078f0df | 700 | { |
77162022 JF |
701 | struct net_bridge *br = netdev_priv(dev); |
702 | int i; | |
b078f0df | 703 | |
77162022 JF |
704 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
705 | goto out; | |
b078f0df | 706 | |
6cb69742 HS |
707 | if (!filter_dev) |
708 | idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
709 | ||
77162022 | 710 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 711 | struct net_bridge_fdb_entry *f; |
b078f0df | 712 | |
b67bfe0d | 713 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
77162022 JF |
714 | if (idx < cb->args[0]) |
715 | goto skip; | |
716 | ||
5e6d2435 JHS |
717 | if (filter_dev && |
718 | (!f->dst || f->dst->dev != filter_dev)) { | |
719 | if (filter_dev != dev) | |
720 | goto skip; | |
6cb69742 | 721 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
722 | * It means the MAC belongs to the bridge |
723 | * Therefore need a little more filtering | |
724 | * we only want to dump the !f->dst case | |
725 | */ | |
726 | if (f->dst) | |
727 | goto skip; | |
728 | } | |
6cb69742 HS |
729 | if (!filter_dev && f->dst) |
730 | goto skip; | |
5d5eacb3 | 731 | |
77162022 | 732 | if (fdb_fill_info(skb, br, f, |
15e47304 | 733 | NETLINK_CB(cb->skb).portid, |
77162022 JF |
734 | cb->nlh->nlmsg_seq, |
735 | RTM_NEWNEIGH, | |
736 | NLM_F_MULTI) < 0) | |
737 | break; | |
b078f0df | 738 | skip: |
77162022 | 739 | ++idx; |
b078f0df | 740 | } |
741 | } | |
b078f0df | 742 | |
77162022 JF |
743 | out: |
744 | return idx; | |
b078f0df | 745 | } |
36fd2b63 | 746 | |
292d1398 | 747 | /* Update (create or replace) forwarding database entry */ |
36fd2b63 | 748 | static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, |
2ba071ec | 749 | __u16 state, __u16 flags, __u16 vid) |
36fd2b63 | 750 | { |
751 | struct net_bridge *br = source->br; | |
2ba071ec | 752 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 753 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 754 | bool modified = false; |
36fd2b63 | 755 | |
eb8d7baa WK |
756 | /* If the port cannot learn allow only local and static entries */ |
757 | if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) && | |
758 | !(source->state == BR_STATE_LEARNING || | |
759 | source->state == BR_STATE_FORWARDING)) | |
760 | return -EPERM; | |
761 | ||
2ba071ec | 762 | fdb = fdb_find(head, addr, vid); |
64af1bac | 763 | if (fdb == NULL) { |
764 | if (!(flags & NLM_F_CREATE)) | |
765 | return -ENOENT; | |
36fd2b63 | 766 | |
2ba071ec | 767 | fdb = fdb_create(head, source, addr, vid); |
64af1bac | 768 | if (!fdb) |
769 | return -ENOMEM; | |
b0a397fb | 770 | |
771 | modified = true; | |
64af1bac | 772 | } else { |
773 | if (flags & NLM_F_EXCL) | |
774 | return -EEXIST; | |
b0a397fb | 775 | |
776 | if (fdb->dst != source) { | |
777 | fdb->dst = source; | |
778 | modified = true; | |
779 | } | |
292d1398 | 780 | } |
781 | ||
782 | if (fdb_to_nud(fdb) != state) { | |
145beee8 VY |
783 | if (state & NUD_PERMANENT) { |
784 | fdb->is_local = 1; | |
785 | if (!fdb->is_static) { | |
786 | fdb->is_static = 1; | |
020ec6ba | 787 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
788 | } |
789 | } else if (state & NUD_NOARP) { | |
790 | fdb->is_local = 0; | |
791 | if (!fdb->is_static) { | |
792 | fdb->is_static = 1; | |
020ec6ba | 793 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
794 | } |
795 | } else { | |
292d1398 | 796 | fdb->is_local = 0; |
145beee8 VY |
797 | if (fdb->is_static) { |
798 | fdb->is_static = 0; | |
020ec6ba | 799 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
800 | } |
801 | } | |
64af1bac | 802 | |
b0a397fb | 803 | modified = true; |
804 | } | |
a5642ab4 | 805 | fdb->added_by_user = 1; |
b0a397fb | 806 | |
807 | fdb->used = jiffies; | |
808 | if (modified) { | |
809 | fdb->updated = jiffies; | |
31e8a49c | 810 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 811 | } |
36fd2b63 | 812 | |
36fd2b63 | 813 | return 0; |
814 | } | |
815 | ||
1690be63 VY |
816 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, |
817 | const unsigned char *addr, u16 nlh_flags, u16 vid) | |
818 | { | |
819 | int err = 0; | |
820 | ||
821 | if (ndm->ndm_flags & NTF_USE) { | |
c4c832f8 | 822 | local_bh_disable(); |
1690be63 | 823 | rcu_read_lock(); |
a5642ab4 | 824 | br_fdb_update(p->br, p, addr, vid, true); |
1690be63 | 825 | rcu_read_unlock(); |
c4c832f8 | 826 | local_bh_enable(); |
1690be63 VY |
827 | } else { |
828 | spin_lock_bh(&p->br->hash_lock); | |
829 | err = fdb_add_entry(p, addr, ndm->ndm_state, | |
830 | nlh_flags, vid); | |
831 | spin_unlock_bh(&p->br->hash_lock); | |
832 | } | |
833 | ||
834 | return err; | |
835 | } | |
836 | ||
36fd2b63 | 837 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 838 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
839 | struct net_device *dev, | |
f6f6424b | 840 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
36fd2b63 | 841 | { |
36fd2b63 | 842 | struct net_bridge_port *p; |
77162022 | 843 | int err = 0; |
1690be63 | 844 | struct net_port_vlans *pv; |
36fd2b63 | 845 | |
292d1398 | 846 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
847 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
848 | return -EINVAL; | |
849 | } | |
850 | ||
537f7f84 SH |
851 | if (is_zero_ether_addr(addr)) { |
852 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
853 | return -EINVAL; | |
854 | } | |
855 | ||
36fd2b63 | 856 | p = br_port_get_rtnl(dev); |
857 | if (p == NULL) { | |
858 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
859 | dev->name); | |
860 | return -EINVAL; | |
861 | } | |
862 | ||
1690be63 | 863 | pv = nbp_get_vlan_info(p); |
f6f6424b | 864 | if (vid) { |
1690be63 VY |
865 | if (!pv || !test_bit(vid, pv->vlan_bitmap)) { |
866 | pr_info("bridge: RTM_NEWNEIGH with unconfigured " | |
867 | "vlan %d on port %s\n", vid, dev->name); | |
868 | return -EINVAL; | |
869 | } | |
870 | ||
871 | /* VID was specified, so use it. */ | |
872 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); | |
292d1398 | 873 | } else { |
25d3b493 TM |
874 | err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); |
875 | if (err || !pv) | |
1690be63 | 876 | goto out; |
1690be63 VY |
877 | |
878 | /* We have vlans configured on this port and user didn't | |
879 | * specify a VLAN. To be nice, add/update entry for every | |
880 | * vlan on this port. | |
881 | */ | |
ef40b7ef | 882 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63 VY |
883 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); |
884 | if (err) | |
885 | goto out; | |
1690be63 | 886 | } |
292d1398 | 887 | } |
36fd2b63 | 888 | |
1690be63 | 889 | out: |
36fd2b63 | 890 | return err; |
891 | } | |
892 | ||
8c86f967 NA |
893 | static int fdb_delete_by_addr_and_port(struct net_bridge_port *p, |
894 | const u8 *addr, u16 vlan) | |
36fd2b63 | 895 | { |
8c86f967 | 896 | struct net_bridge *br = p->br; |
1690be63 | 897 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
36fd2b63 | 898 | struct net_bridge_fdb_entry *fdb; |
899 | ||
1690be63 | 900 | fdb = fdb_find(head, addr, vlan); |
8c86f967 | 901 | if (!fdb || fdb->dst != p) |
36fd2b63 | 902 | return -ENOENT; |
903 | ||
1690be63 | 904 | fdb_delete(br, fdb); |
36fd2b63 | 905 | return 0; |
906 | } | |
907 | ||
1690be63 VY |
908 | static int __br_fdb_delete(struct net_bridge_port *p, |
909 | const unsigned char *addr, u16 vid) | |
910 | { | |
911 | int err; | |
912 | ||
913 | spin_lock_bh(&p->br->hash_lock); | |
8c86f967 | 914 | err = fdb_delete_by_addr_and_port(p, addr, vid); |
1690be63 VY |
915 | spin_unlock_bh(&p->br->hash_lock); |
916 | ||
917 | return err; | |
918 | } | |
919 | ||
36fd2b63 | 920 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
921 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
922 | struct net_device *dev, | |
f6f6424b | 923 | const unsigned char *addr, u16 vid) |
36fd2b63 | 924 | { |
36fd2b63 | 925 | struct net_bridge_port *p; |
36fd2b63 | 926 | int err; |
1690be63 | 927 | struct net_port_vlans *pv; |
1690be63 | 928 | |
36fd2b63 | 929 | p = br_port_get_rtnl(dev); |
930 | if (p == NULL) { | |
931 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
932 | dev->name); | |
933 | return -EINVAL; | |
934 | } | |
935 | ||
1690be63 | 936 | pv = nbp_get_vlan_info(p); |
f6f6424b | 937 | if (vid) { |
1690be63 VY |
938 | if (!pv || !test_bit(vid, pv->vlan_bitmap)) { |
939 | pr_info("bridge: RTM_DELNEIGH with unconfigured " | |
940 | "vlan %d on port %s\n", vid, dev->name); | |
941 | return -EINVAL; | |
942 | } | |
36fd2b63 | 943 | |
1690be63 VY |
944 | err = __br_fdb_delete(p, addr, vid); |
945 | } else { | |
25d3b493 TM |
946 | err = -ENOENT; |
947 | err &= __br_fdb_delete(p, addr, 0); | |
948 | if (!pv) | |
1690be63 | 949 | goto out; |
1690be63 VY |
950 | |
951 | /* We have vlans configured on this port and user didn't | |
952 | * specify a VLAN. To be nice, add/update entry for every | |
953 | * vlan on this port. | |
954 | */ | |
ef40b7ef | 955 | for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { |
1690be63 | 956 | err &= __br_fdb_delete(p, addr, vid); |
1690be63 VY |
957 | } |
958 | } | |
959 | out: | |
36fd2b63 | 960 | return err; |
961 | } | |
8db24af7 VY |
962 | |
963 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
964 | { | |
965 | struct net_bridge_fdb_entry *fdb, *tmp; | |
966 | int i; | |
967 | int err; | |
968 | ||
969 | ASSERT_RTNL(); | |
970 | ||
971 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
972 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
973 | /* We only care for static entries */ | |
974 | if (!fdb->is_static) | |
975 | continue; | |
976 | ||
977 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
978 | if (err) | |
979 | goto rollback; | |
980 | } | |
981 | } | |
982 | return 0; | |
983 | ||
984 | rollback: | |
985 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
986 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
987 | /* If we reached the fdb that failed, we can stop */ | |
988 | if (tmp == fdb) | |
989 | break; | |
990 | ||
991 | /* We only care for static entries */ | |
992 | if (!tmp->is_static) | |
993 | continue; | |
994 | ||
995 | dev_uc_del(p->dev, tmp->addr.addr); | |
996 | } | |
997 | } | |
998 | return err; | |
999 | } | |
1000 | ||
1001 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1002 | { | |
1003 | struct net_bridge_fdb_entry *fdb; | |
1004 | int i; | |
1005 | ||
1006 | ASSERT_RTNL(); | |
1007 | ||
1008 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1009 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
1010 | /* We only care for static entries */ | |
1011 | if (!fdb->is_static) | |
1012 | continue; | |
1013 | ||
1014 | dev_uc_del(p->dev, fdb->addr.addr); | |
1015 | } | |
1016 | } | |
1017 | } | |
cf6b8e1e | 1018 | |
3aeb6617 | 1019 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1020 | const unsigned char *addr, u16 vid) |
1021 | { | |
cf6b8e1e SF |
1022 | struct hlist_head *head; |
1023 | struct net_bridge_fdb_entry *fdb; | |
1024 | int err = 0; | |
1025 | ||
3aeb6617 | 1026 | ASSERT_RTNL(); |
cf6b8e1e SF |
1027 | spin_lock_bh(&br->hash_lock); |
1028 | ||
1029 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1030 | fdb = fdb_find(head, addr, vid); | |
1031 | if (!fdb) { | |
1032 | fdb = fdb_create(head, p, addr, vid); | |
1033 | if (!fdb) { | |
1034 | err = -ENOMEM; | |
1035 | goto err_unlock; | |
1036 | } | |
1037 | fdb->added_by_external_learn = 1; | |
1038 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1039 | } else if (fdb->added_by_external_learn) { | |
1040 | /* Refresh entry */ | |
1041 | fdb->updated = fdb->used = jiffies; | |
1042 | } else if (!fdb->added_by_user) { | |
1043 | /* Take over SW learned entry */ | |
1044 | fdb->added_by_external_learn = 1; | |
1045 | fdb->updated = jiffies; | |
1046 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1047 | } | |
1048 | ||
1049 | err_unlock: | |
1050 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1051 | |
1052 | return err; | |
1053 | } | |
cf6b8e1e | 1054 | |
3aeb6617 | 1055 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1056 | const unsigned char *addr, u16 vid) |
1057 | { | |
cf6b8e1e SF |
1058 | struct hlist_head *head; |
1059 | struct net_bridge_fdb_entry *fdb; | |
1060 | int err = 0; | |
1061 | ||
3aeb6617 | 1062 | ASSERT_RTNL(); |
cf6b8e1e SF |
1063 | spin_lock_bh(&br->hash_lock); |
1064 | ||
1065 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1066 | fdb = fdb_find(head, addr, vid); | |
1067 | if (fdb && fdb->added_by_external_learn) | |
1068 | fdb_delete(br, fdb); | |
1069 | else | |
1070 | err = -ENOENT; | |
1071 | ||
1072 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1073 | |
1074 | return err; | |
1075 | } |