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; | |
2594e906 NA |
166 | struct net_bridge_vlan_group *vg; |
167 | const struct net_bridge_vlan *v; | |
960b589f | 168 | struct net_bridge_port *op; |
2594e906 | 169 | u16 vid = f->vlan_id; |
960b589f TM |
170 | |
171 | /* Maybe another port has same hw addr? */ | |
172 | list_for_each_entry(op, &br->port_list, list) { | |
2594e906 | 173 | vg = nbp_vlan_group(op); |
960b589f | 174 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && |
2594e906 | 175 | (!vid || br_vlan_find(vg, vid))) { |
960b589f | 176 | f->dst = op; |
a778e6d1 | 177 | f->added_by_user = 0; |
960b589f TM |
178 | return; |
179 | } | |
180 | } | |
181 | ||
2594e906 NA |
182 | vg = br_vlan_group(br); |
183 | v = br_vlan_find(vg, vid); | |
960b589f TM |
184 | /* Maybe bridge device has same hw addr? */ |
185 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
2594e906 | 186 | (!vid || (v && br_vlan_should_use(v)))) { |
960b589f | 187 | f->dst = NULL; |
a778e6d1 | 188 | f->added_by_user = 0; |
960b589f TM |
189 | return; |
190 | } | |
191 | ||
192 | fdb_delete(br, f); | |
193 | } | |
194 | ||
424bb9c9 TM |
195 | void br_fdb_find_delete_local(struct net_bridge *br, |
196 | const struct net_bridge_port *p, | |
197 | const unsigned char *addr, u16 vid) | |
198 | { | |
199 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
200 | struct net_bridge_fdb_entry *f; | |
201 | ||
202 | spin_lock_bh(&br->hash_lock); | |
203 | f = fdb_find(head, addr, vid); | |
204 | if (f && f->is_local && !f->added_by_user && f->dst == p) | |
205 | fdb_delete_local(br, p, f); | |
206 | spin_unlock_bh(&br->hash_lock); | |
207 | } | |
208 | ||
1da177e4 LT |
209 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
210 | { | |
2594e906 | 211 | struct net_bridge_vlan_group *vg; |
1da177e4 | 212 | struct net_bridge *br = p->br; |
2594e906 | 213 | struct net_bridge_vlan *v; |
1da177e4 | 214 | int i; |
9d6f229f | 215 | |
1da177e4 LT |
216 | spin_lock_bh(&br->hash_lock); |
217 | ||
2594e906 | 218 | vg = nbp_vlan_group(p); |
1da177e4 LT |
219 | /* Search all chains since old address/hash is unknown */ |
220 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
221 | struct hlist_node *h; | |
222 | hlist_for_each(h, &br->hash[i]) { | |
223 | struct net_bridge_fdb_entry *f; | |
224 | ||
225 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
a5642ab4 | 226 | if (f->dst == p && f->is_local && !f->added_by_user) { |
1da177e4 | 227 | /* delete old one */ |
960b589f TM |
228 | fdb_delete_local(br, p, f); |
229 | ||
bc9a25d2 VY |
230 | /* if this port has no vlan information |
231 | * configured, we can safely be done at | |
232 | * this point. | |
233 | */ | |
2594e906 | 234 | if (!vg || !vg->num_vlans) |
2836882f | 235 | goto insert; |
1da177e4 LT |
236 | } |
237 | } | |
238 | } | |
1da177e4 | 239 | |
2836882f TM |
240 | insert: |
241 | /* insert new address, may fail if invalid address or dup. */ | |
242 | fdb_insert(br, p, newaddr, 0); | |
243 | ||
2594e906 | 244 | if (!vg || !vg->num_vlans) |
2836882f TM |
245 | goto done; |
246 | ||
247 | /* Now add entries for every VLAN configured on the port. | |
248 | * This function runs under RTNL so the bitmap will not change | |
249 | * from under us. | |
250 | */ | |
2594e906 NA |
251 | list_for_each_entry(v, &vg->vlan_list, vlist) |
252 | fdb_insert(br, p, newaddr, v->vid); | |
2836882f | 253 | |
bc9a25d2 | 254 | done: |
1da177e4 LT |
255 | spin_unlock_bh(&br->hash_lock); |
256 | } | |
257 | ||
43598813 | 258 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
259 | { | |
2594e906 | 260 | struct net_bridge_vlan_group *vg; |
43598813 | 261 | struct net_bridge_fdb_entry *f; |
2594e906 | 262 | struct net_bridge_vlan *v; |
43598813 | 263 | |
ac4c8868 TM |
264 | spin_lock_bh(&br->hash_lock); |
265 | ||
43598813 | 266 | /* If old entry was unassociated with any port, then delete it. */ |
2ba071ec | 267 | f = __br_fdb_get(br, br->dev->dev_addr, 0); |
43598813 | 268 | if (f && f->is_local && !f->dst) |
960b589f | 269 | fdb_delete_local(br, NULL, f); |
43598813 | 270 | |
bc9a25d2 | 271 | fdb_insert(br, NULL, newaddr, 0); |
2594e906 NA |
272 | vg = br_vlan_group(br); |
273 | if (!vg || !vg->num_vlans) | |
274 | goto out; | |
bc9a25d2 VY |
275 | /* Now remove and add entries for every VLAN configured on the |
276 | * bridge. This function runs under RTNL so the bitmap will not | |
277 | * change from under us. | |
278 | */ | |
2594e906 NA |
279 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
280 | f = __br_fdb_get(br, br->dev->dev_addr, v->vid); | |
bc9a25d2 | 281 | if (f && f->is_local && !f->dst) |
960b589f | 282 | fdb_delete_local(br, NULL, f); |
2594e906 | 283 | fdb_insert(br, NULL, newaddr, v->vid); |
bc9a25d2 | 284 | } |
ac4c8868 TM |
285 | out: |
286 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 287 | } |
288 | ||
1da177e4 LT |
289 | void br_fdb_cleanup(unsigned long _data) |
290 | { | |
291 | struct net_bridge *br = (struct net_bridge *)_data; | |
292 | unsigned long delay = hold_time(br); | |
25442e06 | 293 | unsigned long next_timer = jiffies + br->ageing_time; |
1da177e4 LT |
294 | int i; |
295 | ||
27a42938 | 296 | spin_lock(&br->hash_lock); |
1da177e4 LT |
297 | for (i = 0; i < BR_HASH_SIZE; i++) { |
298 | struct net_bridge_fdb_entry *f; | |
b67bfe0d | 299 | struct hlist_node *n; |
1da177e4 | 300 | |
b67bfe0d | 301 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
071f7722 | 302 | unsigned long this_timer; |
3fcf9011 | 303 | if (f->is_static) |
071f7722 | 304 | continue; |
dcd45e06 SM |
305 | if (f->added_by_external_learn) |
306 | continue; | |
7cd8861a | 307 | this_timer = f->updated + delay; |
071f7722 | 308 | if (time_before_eq(this_timer, jiffies)) |
31e8a49c | 309 | fdb_delete(br, f); |
2bec008c | 310 | else if (time_before(this_timer, next_timer)) |
071f7722 | 311 | next_timer = this_timer; |
1da177e4 LT |
312 | } |
313 | } | |
27a42938 | 314 | spin_unlock(&br->hash_lock); |
1da177e4 | 315 | |
25442e06 | 316 | mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
1da177e4 LT |
317 | } |
318 | ||
9cf63747 SH |
319 | /* Completely flush all dynamic entries in forwarding database.*/ |
320 | void br_fdb_flush(struct net_bridge *br) | |
321 | { | |
322 | int i; | |
323 | ||
324 | spin_lock_bh(&br->hash_lock); | |
325 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
326 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
327 | struct hlist_node *n; |
328 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 329 | if (!f->is_static) |
31e8a49c | 330 | fdb_delete(br, f); |
9cf63747 SH |
331 | } |
332 | } | |
333 | spin_unlock_bh(&br->hash_lock); | |
334 | } | |
1a620698 | 335 | |
25985edc | 336 | /* Flush all entries referring to a specific port. |
9cf63747 | 337 | * if do_all is set also flush static entries |
1ea2d020 | 338 | * if vid is set delete all entries that match the vlan_id |
9cf63747 | 339 | */ |
1a620698 SH |
340 | void br_fdb_delete_by_port(struct net_bridge *br, |
341 | const struct net_bridge_port *p, | |
1ea2d020 | 342 | u16 vid, |
1a620698 | 343 | int do_all) |
1da177e4 LT |
344 | { |
345 | int i; | |
346 | ||
347 | spin_lock_bh(&br->hash_lock); | |
348 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
349 | struct hlist_node *h, *g; | |
9d6f229f | 350 | |
1da177e4 LT |
351 | hlist_for_each_safe(h, g, &br->hash[i]) { |
352 | struct net_bridge_fdb_entry *f | |
353 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 354 | if (f->dst != p) |
1da177e4 LT |
355 | continue; |
356 | ||
1ea2d020 NA |
357 | if (!do_all) |
358 | if (f->is_static || (vid && f->vlan_id != vid)) | |
359 | continue; | |
1da177e4 | 360 | |
a778e6d1 TM |
361 | if (f->is_local) |
362 | fdb_delete_local(br, p, f); | |
363 | else | |
364 | fdb_delete(br, f); | |
1da177e4 LT |
365 | } |
366 | } | |
367 | spin_unlock_bh(&br->hash_lock); | |
368 | } | |
369 | ||
eeaf61d8 | 370 | /* No locking or refcounting, assumes caller has rcu_read_lock */ |
1da177e4 | 371 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
2ba071ec VY |
372 | const unsigned char *addr, |
373 | __u16 vid) | |
1da177e4 | 374 | { |
1da177e4 LT |
375 | struct net_bridge_fdb_entry *fdb; |
376 | ||
b67bfe0d | 377 | hlist_for_each_entry_rcu(fdb, |
2ba071ec VY |
378 | &br->hash[br_mac_hash(addr, vid)], hlist) { |
379 | if (ether_addr_equal(fdb->addr.addr, addr) && | |
380 | fdb->vlan_id == vid) { | |
1da177e4 LT |
381 | if (unlikely(has_expired(br, fdb))) |
382 | break; | |
383 | return fdb; | |
384 | } | |
385 | } | |
386 | ||
387 | return NULL; | |
388 | } | |
389 | ||
e6373c4c | 390 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
391 | /* Interface used by ATM LANE hook to test |
392 | * if an addr is on some other bridge port */ | |
393 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
394 | { |
395 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 396 | struct net_bridge_port *port; |
da678292 MM |
397 | int ret; |
398 | ||
1da177e4 | 399 | rcu_read_lock(); |
b5ed54e9 | 400 | port = br_port_get_rcu(dev); |
401 | if (!port) | |
402 | ret = 0; | |
403 | else { | |
2ba071ec | 404 | fdb = __br_fdb_get(port->br, addr, 0); |
43598813 | 405 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 406 | fdb->dst->state == BR_STATE_FORWARDING; |
407 | } | |
1da177e4 | 408 | rcu_read_unlock(); |
1da177e4 | 409 | |
da678292 | 410 | return ret; |
1da177e4 | 411 | } |
da678292 | 412 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
413 | |
414 | /* | |
9d6f229f | 415 | * Fill buffer with forwarding table records in |
1da177e4 LT |
416 | * the API format. |
417 | */ | |
418 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
419 | unsigned long maxnum, unsigned long skip) | |
420 | { | |
421 | struct __fdb_entry *fe = buf; | |
422 | int i, num = 0; | |
1da177e4 LT |
423 | struct net_bridge_fdb_entry *f; |
424 | ||
425 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
426 | ||
427 | rcu_read_lock(); | |
428 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 429 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
430 | if (num >= maxnum) |
431 | goto out; | |
432 | ||
9d6f229f | 433 | if (has_expired(br, f)) |
1da177e4 LT |
434 | continue; |
435 | ||
43598813 | 436 | /* ignore pseudo entry for local MAC address */ |
437 | if (!f->dst) | |
438 | continue; | |
439 | ||
1da177e4 LT |
440 | if (skip) { |
441 | --skip; | |
442 | continue; | |
443 | } | |
444 | ||
445 | /* convert from internal format to API */ | |
446 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
447 | |
448 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 449 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
450 | fe->port_hi = f->dst->port_no >> 8; |
451 | ||
1da177e4 LT |
452 | fe->is_local = f->is_local; |
453 | if (!f->is_static) | |
a399a805 | 454 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
455 | ++fe; |
456 | ++num; | |
457 | } | |
458 | } | |
459 | ||
460 | out: | |
461 | rcu_read_unlock(); | |
462 | ||
463 | return num; | |
464 | } | |
465 | ||
664de48b | 466 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
2ba071ec VY |
467 | const unsigned char *addr, |
468 | __u16 vid) | |
664de48b | 469 | { |
664de48b | 470 | struct net_bridge_fdb_entry *fdb; |
471 | ||
b67bfe0d | 472 | hlist_for_each_entry(fdb, head, hlist) { |
2ba071ec VY |
473 | if (ether_addr_equal(fdb->addr.addr, addr) && |
474 | fdb->vlan_id == vid) | |
664de48b | 475 | return fdb; |
476 | } | |
477 | return NULL; | |
478 | } | |
479 | ||
480 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, | |
2ba071ec VY |
481 | const unsigned char *addr, |
482 | __u16 vid) | |
1da177e4 | 483 | { |
1da177e4 LT |
484 | struct net_bridge_fdb_entry *fdb; |
485 | ||
b67bfe0d | 486 | hlist_for_each_entry_rcu(fdb, head, hlist) { |
2ba071ec VY |
487 | if (ether_addr_equal(fdb->addr.addr, addr) && |
488 | fdb->vlan_id == vid) | |
1da177e4 LT |
489 | return fdb; |
490 | } | |
491 | return NULL; | |
492 | } | |
493 | ||
494 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, | |
495 | struct net_bridge_port *source, | |
2ba071ec VY |
496 | const unsigned char *addr, |
497 | __u16 vid) | |
1da177e4 LT |
498 | { |
499 | struct net_bridge_fdb_entry *fdb; | |
500 | ||
501 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
502 | if (fdb) { | |
503 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 504 | fdb->dst = source; |
2ba071ec | 505 | fdb->vlan_id = vid; |
03e9b64b | 506 | fdb->is_local = 0; |
507 | fdb->is_static = 0; | |
a5642ab4 | 508 | fdb->added_by_user = 0; |
cf6b8e1e | 509 | fdb->added_by_external_learn = 0; |
7cd8861a | 510 | fdb->updated = fdb->used = jiffies; |
1158f762 | 511 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
512 | } |
513 | return fdb; | |
514 | } | |
515 | ||
516 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 517 | const unsigned char *addr, u16 vid) |
1da177e4 | 518 | { |
bc9a25d2 | 519 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
520 | struct net_bridge_fdb_entry *fdb; |
521 | ||
522 | if (!is_valid_ether_addr(addr)) | |
523 | return -EINVAL; | |
524 | ||
bc9a25d2 | 525 | fdb = fdb_find(head, addr, vid); |
1da177e4 | 526 | if (fdb) { |
9d6f229f | 527 | /* it is okay to have multiple ports with same |
1da177e4 LT |
528 | * address, just use the first one. |
529 | */ | |
9d6f229f | 530 | if (fdb->is_local) |
1da177e4 | 531 | return 0; |
28a16c97 | 532 | br_warn(br, "adding interface %s with same address " |
1da177e4 | 533 | "as a received packet\n", |
9b46922e | 534 | source ? source->dev->name : br->dev->name); |
31e8a49c | 535 | fdb_delete(br, fdb); |
9d6f229f | 536 | } |
1da177e4 | 537 | |
bc9a25d2 | 538 | fdb = fdb_create(head, source, addr, vid); |
03e9b64b | 539 | if (!fdb) |
1da177e4 LT |
540 | return -ENOMEM; |
541 | ||
03e9b64b | 542 | fdb->is_local = fdb->is_static = 1; |
020ec6ba | 543 | fdb_add_hw_addr(br, addr); |
31e8a49c | 544 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
545 | return 0; |
546 | } | |
547 | ||
03e9b64b | 548 | /* Add entry for local address of interface */ |
1da177e4 | 549 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 550 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
551 | { |
552 | int ret; | |
553 | ||
554 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 555 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
556 | spin_unlock_bh(&br->hash_lock); |
557 | return ret; | |
558 | } | |
559 | ||
560 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 561 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 562 | { |
2ba071ec | 563 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 564 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 565 | bool fdb_modified = false; |
1da177e4 LT |
566 | |
567 | /* some users want to always flood. */ | |
568 | if (hold_time(br) == 0) | |
569 | return; | |
570 | ||
df1c0b84 SH |
571 | /* ignore packets unless we are using this port */ |
572 | if (!(source->state == BR_STATE_LEARNING || | |
573 | source->state == BR_STATE_FORWARDING)) | |
574 | return; | |
575 | ||
2ba071ec | 576 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
577 | if (likely(fdb)) { |
578 | /* attempt to update an entry for a local interface */ | |
579 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 580 | if (net_ratelimit()) |
28a16c97 | 581 | br_warn(br, "received packet on %s with " |
582 | "own address as source address\n", | |
583 | source->dev->name); | |
1da177e4 LT |
584 | } else { |
585 | /* fastpath: update of existing entry */ | |
c65c7a30 JM |
586 | if (unlikely(source != fdb->dst)) { |
587 | fdb->dst = source; | |
588 | fdb_modified = true; | |
589 | } | |
7cd8861a | 590 | fdb->updated = jiffies; |
a5642ab4 TM |
591 | if (unlikely(added_by_user)) |
592 | fdb->added_by_user = 1; | |
c65c7a30 JM |
593 | if (unlikely(fdb_modified)) |
594 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1da177e4 LT |
595 | } |
596 | } else { | |
f8ae737d | 597 | spin_lock(&br->hash_lock); |
2ba071ec VY |
598 | if (likely(!fdb_find(head, addr, vid))) { |
599 | fdb = fdb_create(head, source, addr, vid); | |
a5642ab4 TM |
600 | if (fdb) { |
601 | if (unlikely(added_by_user)) | |
602 | fdb->added_by_user = 1; | |
31e8a49c | 603 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 604 | } |
f58ee4e1 | 605 | } |
1da177e4 LT |
606 | /* else we lose race and someone else inserts |
607 | * it first, don't bother updating | |
608 | */ | |
f8ae737d | 609 | spin_unlock(&br->hash_lock); |
1da177e4 | 610 | } |
1da177e4 | 611 | } |
b078f0df | 612 | |
613 | static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb) | |
614 | { | |
615 | if (fdb->is_local) | |
616 | return NUD_PERMANENT; | |
617 | else if (fdb->is_static) | |
618 | return NUD_NOARP; | |
619 | else if (has_expired(fdb->dst->br, fdb)) | |
620 | return NUD_STALE; | |
621 | else | |
622 | return NUD_REACHABLE; | |
623 | } | |
624 | ||
31e8a49c | 625 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 626 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 627 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 628 | { |
629 | unsigned long now = jiffies; | |
630 | struct nda_cacheinfo ci; | |
631 | struct nlmsghdr *nlh; | |
632 | struct ndmsg *ndm; | |
633 | ||
15e47304 | 634 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 635 | if (nlh == NULL) |
636 | return -EMSGSIZE; | |
637 | ||
b078f0df | 638 | ndm = nlmsg_data(nlh); |
639 | ndm->ndm_family = AF_BRIDGE; | |
640 | ndm->ndm_pad1 = 0; | |
641 | ndm->ndm_pad2 = 0; | |
cf6b8e1e | 642 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
b078f0df | 643 | ndm->ndm_type = 0; |
43598813 | 644 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
b078f0df | 645 | ndm->ndm_state = fdb_to_nud(fdb); |
646 | ||
2eb812e6 DM |
647 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
648 | goto nla_put_failure; | |
41c389d7 RP |
649 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
650 | goto nla_put_failure; | |
b078f0df | 651 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
652 | ci.ndm_confirmed = 0; | |
653 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
654 | ci.ndm_refcnt = 0; | |
2eb812e6 DM |
655 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
656 | goto nla_put_failure; | |
1690be63 | 657 | |
47fab41a | 658 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
1690be63 VY |
659 | goto nla_put_failure; |
660 | ||
053c095a JB |
661 | nlmsg_end(skb, nlh); |
662 | return 0; | |
b078f0df | 663 | |
664 | nla_put_failure: | |
665 | nlmsg_cancel(skb, nlh); | |
666 | return -EMSGSIZE; | |
667 | } | |
668 | ||
669 | static inline size_t fdb_nlmsg_size(void) | |
670 | { | |
671 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
672 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
41c389d7 | 673 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
1690be63 | 674 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df | 675 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
676 | } | |
677 | ||
31e8a49c | 678 | static void fdb_notify(struct net_bridge *br, |
679 | const struct net_bridge_fdb_entry *fdb, int type) | |
b078f0df | 680 | { |
31e8a49c | 681 | struct net *net = dev_net(br->dev); |
b078f0df | 682 | struct sk_buff *skb; |
683 | int err = -ENOBUFS; | |
684 | ||
685 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
686 | if (skb == NULL) | |
687 | goto errout; | |
688 | ||
31e8a49c | 689 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 690 | if (err < 0) { |
691 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
692 | WARN_ON(err == -EMSGSIZE); | |
693 | kfree_skb(skb); | |
694 | goto errout; | |
695 | } | |
696 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
697 | return; | |
698 | errout: | |
87e823b3 | 699 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 700 | } |
701 | ||
702 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
703 | int br_fdb_dump(struct sk_buff *skb, |
704 | struct netlink_callback *cb, | |
705 | struct net_device *dev, | |
5d5eacb3 | 706 | struct net_device *filter_dev, |
77162022 | 707 | int idx) |
b078f0df | 708 | { |
77162022 JF |
709 | struct net_bridge *br = netdev_priv(dev); |
710 | int i; | |
b078f0df | 711 | |
77162022 JF |
712 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
713 | goto out; | |
b078f0df | 714 | |
6cb69742 HS |
715 | if (!filter_dev) |
716 | idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
717 | ||
77162022 | 718 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 719 | struct net_bridge_fdb_entry *f; |
b078f0df | 720 | |
b67bfe0d | 721 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
77162022 JF |
722 | if (idx < cb->args[0]) |
723 | goto skip; | |
724 | ||
5e6d2435 JHS |
725 | if (filter_dev && |
726 | (!f->dst || f->dst->dev != filter_dev)) { | |
727 | if (filter_dev != dev) | |
728 | goto skip; | |
6cb69742 | 729 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
730 | * It means the MAC belongs to the bridge |
731 | * Therefore need a little more filtering | |
732 | * we only want to dump the !f->dst case | |
733 | */ | |
734 | if (f->dst) | |
735 | goto skip; | |
736 | } | |
6cb69742 HS |
737 | if (!filter_dev && f->dst) |
738 | goto skip; | |
5d5eacb3 | 739 | |
77162022 | 740 | if (fdb_fill_info(skb, br, f, |
15e47304 | 741 | NETLINK_CB(cb->skb).portid, |
77162022 JF |
742 | cb->nlh->nlmsg_seq, |
743 | RTM_NEWNEIGH, | |
744 | NLM_F_MULTI) < 0) | |
745 | break; | |
b078f0df | 746 | skip: |
77162022 | 747 | ++idx; |
b078f0df | 748 | } |
749 | } | |
b078f0df | 750 | |
77162022 JF |
751 | out: |
752 | return idx; | |
b078f0df | 753 | } |
36fd2b63 | 754 | |
292d1398 | 755 | /* Update (create or replace) forwarding database entry */ |
36fd2b63 | 756 | static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, |
2ba071ec | 757 | __u16 state, __u16 flags, __u16 vid) |
36fd2b63 | 758 | { |
759 | struct net_bridge *br = source->br; | |
2ba071ec | 760 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 761 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 762 | bool modified = false; |
36fd2b63 | 763 | |
eb8d7baa WK |
764 | /* If the port cannot learn allow only local and static entries */ |
765 | if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) && | |
766 | !(source->state == BR_STATE_LEARNING || | |
767 | source->state == BR_STATE_FORWARDING)) | |
768 | return -EPERM; | |
769 | ||
2ba071ec | 770 | fdb = fdb_find(head, addr, vid); |
64af1bac | 771 | if (fdb == NULL) { |
772 | if (!(flags & NLM_F_CREATE)) | |
773 | return -ENOENT; | |
36fd2b63 | 774 | |
2ba071ec | 775 | fdb = fdb_create(head, source, addr, vid); |
64af1bac | 776 | if (!fdb) |
777 | return -ENOMEM; | |
b0a397fb | 778 | |
779 | modified = true; | |
64af1bac | 780 | } else { |
781 | if (flags & NLM_F_EXCL) | |
782 | return -EEXIST; | |
b0a397fb | 783 | |
784 | if (fdb->dst != source) { | |
785 | fdb->dst = source; | |
786 | modified = true; | |
787 | } | |
292d1398 | 788 | } |
789 | ||
790 | if (fdb_to_nud(fdb) != state) { | |
145beee8 VY |
791 | if (state & NUD_PERMANENT) { |
792 | fdb->is_local = 1; | |
793 | if (!fdb->is_static) { | |
794 | fdb->is_static = 1; | |
020ec6ba | 795 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
796 | } |
797 | } else if (state & NUD_NOARP) { | |
798 | fdb->is_local = 0; | |
799 | if (!fdb->is_static) { | |
800 | fdb->is_static = 1; | |
020ec6ba | 801 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
802 | } |
803 | } else { | |
292d1398 | 804 | fdb->is_local = 0; |
145beee8 VY |
805 | if (fdb->is_static) { |
806 | fdb->is_static = 0; | |
020ec6ba | 807 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
808 | } |
809 | } | |
64af1bac | 810 | |
b0a397fb | 811 | modified = true; |
812 | } | |
a5642ab4 | 813 | fdb->added_by_user = 1; |
b0a397fb | 814 | |
815 | fdb->used = jiffies; | |
816 | if (modified) { | |
817 | fdb->updated = jiffies; | |
31e8a49c | 818 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 819 | } |
36fd2b63 | 820 | |
36fd2b63 | 821 | return 0; |
822 | } | |
823 | ||
1690be63 VY |
824 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, |
825 | const unsigned char *addr, u16 nlh_flags, u16 vid) | |
826 | { | |
827 | int err = 0; | |
828 | ||
829 | if (ndm->ndm_flags & NTF_USE) { | |
c4c832f8 | 830 | local_bh_disable(); |
1690be63 | 831 | rcu_read_lock(); |
a5642ab4 | 832 | br_fdb_update(p->br, p, addr, vid, true); |
1690be63 | 833 | rcu_read_unlock(); |
c4c832f8 | 834 | local_bh_enable(); |
1690be63 VY |
835 | } else { |
836 | spin_lock_bh(&p->br->hash_lock); | |
837 | err = fdb_add_entry(p, addr, ndm->ndm_state, | |
838 | nlh_flags, vid); | |
839 | spin_unlock_bh(&p->br->hash_lock); | |
840 | } | |
841 | ||
842 | return err; | |
843 | } | |
844 | ||
36fd2b63 | 845 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 846 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
847 | struct net_device *dev, | |
f6f6424b | 848 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
36fd2b63 | 849 | { |
2594e906 | 850 | struct net_bridge_vlan_group *vg; |
36fd2b63 | 851 | struct net_bridge_port *p; |
2594e906 | 852 | struct net_bridge_vlan *v; |
77162022 | 853 | int err = 0; |
36fd2b63 | 854 | |
292d1398 | 855 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
856 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
857 | return -EINVAL; | |
858 | } | |
859 | ||
537f7f84 SH |
860 | if (is_zero_ether_addr(addr)) { |
861 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
862 | return -EINVAL; | |
863 | } | |
864 | ||
36fd2b63 | 865 | p = br_port_get_rtnl(dev); |
866 | if (p == NULL) { | |
867 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
868 | dev->name); | |
869 | return -EINVAL; | |
870 | } | |
871 | ||
2594e906 | 872 | vg = nbp_vlan_group(p); |
f6f6424b | 873 | if (vid) { |
2594e906 NA |
874 | v = br_vlan_find(vg, vid); |
875 | if (!v) { | |
1690be63 VY |
876 | pr_info("bridge: RTM_NEWNEIGH with unconfigured " |
877 | "vlan %d on port %s\n", vid, dev->name); | |
878 | return -EINVAL; | |
879 | } | |
880 | ||
881 | /* VID was specified, so use it. */ | |
882 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); | |
292d1398 | 883 | } else { |
25d3b493 | 884 | err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); |
2594e906 | 885 | if (err || !vg || !vg->num_vlans) |
1690be63 | 886 | goto out; |
1690be63 VY |
887 | |
888 | /* We have vlans configured on this port and user didn't | |
889 | * specify a VLAN. To be nice, add/update entry for every | |
890 | * vlan on this port. | |
891 | */ | |
2594e906 NA |
892 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
893 | err = __br_fdb_add(ndm, p, addr, nlh_flags, v->vid); | |
1690be63 VY |
894 | if (err) |
895 | goto out; | |
1690be63 | 896 | } |
292d1398 | 897 | } |
36fd2b63 | 898 | |
1690be63 | 899 | out: |
36fd2b63 | 900 | return err; |
901 | } | |
902 | ||
8c86f967 NA |
903 | static int fdb_delete_by_addr_and_port(struct net_bridge_port *p, |
904 | const u8 *addr, u16 vlan) | |
36fd2b63 | 905 | { |
8c86f967 | 906 | struct net_bridge *br = p->br; |
1690be63 | 907 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
36fd2b63 | 908 | struct net_bridge_fdb_entry *fdb; |
909 | ||
1690be63 | 910 | fdb = fdb_find(head, addr, vlan); |
8c86f967 | 911 | if (!fdb || fdb->dst != p) |
36fd2b63 | 912 | return -ENOENT; |
913 | ||
1690be63 | 914 | fdb_delete(br, fdb); |
36fd2b63 | 915 | return 0; |
916 | } | |
917 | ||
1690be63 VY |
918 | static int __br_fdb_delete(struct net_bridge_port *p, |
919 | const unsigned char *addr, u16 vid) | |
920 | { | |
921 | int err; | |
922 | ||
923 | spin_lock_bh(&p->br->hash_lock); | |
8c86f967 | 924 | err = fdb_delete_by_addr_and_port(p, addr, vid); |
1690be63 VY |
925 | spin_unlock_bh(&p->br->hash_lock); |
926 | ||
927 | return err; | |
928 | } | |
929 | ||
36fd2b63 | 930 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
931 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
932 | struct net_device *dev, | |
f6f6424b | 933 | const unsigned char *addr, u16 vid) |
36fd2b63 | 934 | { |
2594e906 | 935 | struct net_bridge_vlan_group *vg; |
36fd2b63 | 936 | struct net_bridge_port *p; |
2594e906 | 937 | struct net_bridge_vlan *v; |
36fd2b63 | 938 | int err; |
1690be63 | 939 | |
36fd2b63 | 940 | p = br_port_get_rtnl(dev); |
941 | if (p == NULL) { | |
942 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
943 | dev->name); | |
944 | return -EINVAL; | |
945 | } | |
946 | ||
2594e906 | 947 | vg = nbp_vlan_group(p); |
f6f6424b | 948 | if (vid) { |
2594e906 NA |
949 | v = br_vlan_find(vg, vid); |
950 | if (!v) { | |
1690be63 VY |
951 | pr_info("bridge: RTM_DELNEIGH with unconfigured " |
952 | "vlan %d on port %s\n", vid, dev->name); | |
953 | return -EINVAL; | |
954 | } | |
36fd2b63 | 955 | |
1690be63 VY |
956 | err = __br_fdb_delete(p, addr, vid); |
957 | } else { | |
25d3b493 TM |
958 | err = -ENOENT; |
959 | err &= __br_fdb_delete(p, addr, 0); | |
2594e906 | 960 | if (!vg || !vg->num_vlans) |
1690be63 | 961 | goto out; |
1690be63 | 962 | |
2594e906 NA |
963 | list_for_each_entry(v, &vg->vlan_list, vlist) |
964 | err &= __br_fdb_delete(p, addr, v->vid); | |
1690be63 VY |
965 | } |
966 | out: | |
36fd2b63 | 967 | return err; |
968 | } | |
8db24af7 VY |
969 | |
970 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
971 | { | |
972 | struct net_bridge_fdb_entry *fdb, *tmp; | |
973 | int i; | |
974 | int err; | |
975 | ||
976 | ASSERT_RTNL(); | |
977 | ||
978 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
979 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
980 | /* We only care for static entries */ | |
981 | if (!fdb->is_static) | |
982 | continue; | |
983 | ||
984 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
985 | if (err) | |
986 | goto rollback; | |
987 | } | |
988 | } | |
989 | return 0; | |
990 | ||
991 | rollback: | |
992 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
993 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
994 | /* If we reached the fdb that failed, we can stop */ | |
995 | if (tmp == fdb) | |
996 | break; | |
997 | ||
998 | /* We only care for static entries */ | |
999 | if (!tmp->is_static) | |
1000 | continue; | |
1001 | ||
1002 | dev_uc_del(p->dev, tmp->addr.addr); | |
1003 | } | |
1004 | } | |
1005 | return err; | |
1006 | } | |
1007 | ||
1008 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1009 | { | |
1010 | struct net_bridge_fdb_entry *fdb; | |
1011 | int i; | |
1012 | ||
1013 | ASSERT_RTNL(); | |
1014 | ||
1015 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1016 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
1017 | /* We only care for static entries */ | |
1018 | if (!fdb->is_static) | |
1019 | continue; | |
1020 | ||
1021 | dev_uc_del(p->dev, fdb->addr.addr); | |
1022 | } | |
1023 | } | |
1024 | } | |
cf6b8e1e | 1025 | |
3aeb6617 | 1026 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1027 | const unsigned char *addr, u16 vid) |
1028 | { | |
cf6b8e1e SF |
1029 | struct hlist_head *head; |
1030 | struct net_bridge_fdb_entry *fdb; | |
1031 | int err = 0; | |
1032 | ||
3aeb6617 | 1033 | ASSERT_RTNL(); |
cf6b8e1e SF |
1034 | spin_lock_bh(&br->hash_lock); |
1035 | ||
1036 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1037 | fdb = fdb_find(head, addr, vid); | |
1038 | if (!fdb) { | |
1039 | fdb = fdb_create(head, p, addr, vid); | |
1040 | if (!fdb) { | |
1041 | err = -ENOMEM; | |
1042 | goto err_unlock; | |
1043 | } | |
1044 | fdb->added_by_external_learn = 1; | |
1045 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1046 | } else if (fdb->added_by_external_learn) { | |
1047 | /* Refresh entry */ | |
1048 | fdb->updated = fdb->used = jiffies; | |
1049 | } else if (!fdb->added_by_user) { | |
1050 | /* Take over SW learned entry */ | |
1051 | fdb->added_by_external_learn = 1; | |
1052 | fdb->updated = jiffies; | |
1053 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1054 | } | |
1055 | ||
1056 | err_unlock: | |
1057 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1058 | |
1059 | return err; | |
1060 | } | |
cf6b8e1e | 1061 | |
3aeb6617 | 1062 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1063 | const unsigned char *addr, u16 vid) |
1064 | { | |
cf6b8e1e SF |
1065 | struct hlist_head *head; |
1066 | struct net_bridge_fdb_entry *fdb; | |
1067 | int err = 0; | |
1068 | ||
3aeb6617 | 1069 | ASSERT_RTNL(); |
cf6b8e1e SF |
1070 | spin_lock_bh(&br->hash_lock); |
1071 | ||
1072 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1073 | fdb = fdb_find(head, addr, vid); | |
1074 | if (fdb && fdb->added_by_external_learn) | |
1075 | fdb_delete(br, fdb); | |
1076 | else | |
1077 | err = -ENOENT; | |
1078 | ||
1079 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1080 | |
1081 | return err; | |
1082 | } |