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; |
1da177e4 | 31 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 32 | const unsigned char *addr, u16 vid); |
31e8a49c | 33 | static void fdb_notify(struct net_bridge *br, |
34 | const struct net_bridge_fdb_entry *, int); | |
1da177e4 | 35 | |
3f890923 SH |
36 | static u32 fdb_salt __read_mostly; |
37 | ||
87a596e0 | 38 | int __init br_fdb_init(void) |
1da177e4 LT |
39 | { |
40 | br_fdb_cache = kmem_cache_create("bridge_fdb_cache", | |
41 | sizeof(struct net_bridge_fdb_entry), | |
42 | 0, | |
20c2df83 | 43 | SLAB_HWCACHE_ALIGN, NULL); |
87a596e0 AM |
44 | if (!br_fdb_cache) |
45 | return -ENOMEM; | |
46 | ||
3f890923 | 47 | get_random_bytes(&fdb_salt, sizeof(fdb_salt)); |
87a596e0 | 48 | return 0; |
1da177e4 LT |
49 | } |
50 | ||
73afc906 | 51 | void br_fdb_fini(void) |
1da177e4 LT |
52 | { |
53 | kmem_cache_destroy(br_fdb_cache); | |
54 | } | |
55 | ||
56 | ||
57 | /* if topology_changing then use forward_delay (default 15 sec) | |
58 | * otherwise keep longer (default 5 minutes) | |
59 | */ | |
3f890923 | 60 | static inline unsigned long hold_time(const struct net_bridge *br) |
1da177e4 LT |
61 | { |
62 | return br->topology_change ? br->forward_delay : br->ageing_time; | |
63 | } | |
64 | ||
3f890923 | 65 | static inline int has_expired(const struct net_bridge *br, |
1da177e4 LT |
66 | const struct net_bridge_fdb_entry *fdb) |
67 | { | |
eda7a5e8 | 68 | return !fdb->is_static && !fdb->added_by_external_learn && |
7cd8861a | 69 | time_before_eq(fdb->updated + hold_time(br), jiffies); |
1da177e4 LT |
70 | } |
71 | ||
2ba071ec | 72 | static inline int br_mac_hash(const unsigned char *mac, __u16 vid) |
1da177e4 | 73 | { |
2ba071ec | 74 | /* use 1 byte of OUI and 3 bytes of NIC */ |
3f890923 | 75 | u32 key = get_unaligned((u32 *)(mac + 2)); |
2ba071ec | 76 | return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); |
1da177e4 LT |
77 | } |
78 | ||
da678292 MM |
79 | static void fdb_rcu_free(struct rcu_head *head) |
80 | { | |
81 | struct net_bridge_fdb_entry *ent | |
82 | = container_of(head, struct net_bridge_fdb_entry, rcu); | |
83 | kmem_cache_free(br_fdb_cache, ent); | |
84 | } | |
85 | ||
bfd0aeac NA |
86 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, |
87 | const unsigned char *addr, | |
88 | __u16 vid) | |
89 | { | |
90 | struct net_bridge_fdb_entry *f; | |
91 | ||
410b3d48 NA |
92 | WARN_ON_ONCE(!rcu_read_lock_held()); |
93 | ||
bfd0aeac NA |
94 | hlist_for_each_entry_rcu(f, head, hlist) |
95 | if (ether_addr_equal(f->addr.addr, addr) && f->vlan_id == vid) | |
96 | break; | |
97 | ||
98 | return f; | |
99 | } | |
100 | ||
101 | /* requires bridge hash_lock */ | |
102 | static struct net_bridge_fdb_entry *br_fdb_find(struct net_bridge *br, | |
103 | const unsigned char *addr, | |
104 | __u16 vid) | |
105 | { | |
106 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
107 | struct net_bridge_fdb_entry *fdb; | |
108 | ||
d12c9176 | 109 | lockdep_assert_held_once(&br->hash_lock); |
410b3d48 | 110 | |
bfd0aeac NA |
111 | rcu_read_lock(); |
112 | fdb = fdb_find_rcu(head, addr, vid); | |
113 | rcu_read_unlock(); | |
114 | ||
115 | return fdb; | |
116 | } | |
117 | ||
118 | struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, | |
119 | const unsigned char *addr, | |
120 | __u16 vid) | |
121 | { | |
122 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
123 | ||
124 | return fdb_find_rcu(head, addr, vid); | |
125 | } | |
126 | ||
145beee8 VY |
127 | /* When a static FDB entry is added, the mac address from the entry is |
128 | * added to the bridge private HW address list and all required ports | |
129 | * are then updated with the new information. | |
130 | * Called under RTNL. | |
131 | */ | |
020ec6ba | 132 | static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
133 | { |
134 | int err; | |
a3f5ee71 | 135 | struct net_bridge_port *p; |
145beee8 VY |
136 | |
137 | ASSERT_RTNL(); | |
138 | ||
139 | list_for_each_entry(p, &br->port_list, list) { | |
140 | if (!br_promisc_port(p)) { | |
141 | err = dev_uc_add(p->dev, addr); | |
142 | if (err) | |
143 | goto undo; | |
144 | } | |
145 | } | |
146 | ||
147 | return; | |
148 | undo: | |
a3f5ee71 LR |
149 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
150 | if (!br_promisc_port(p)) | |
151 | dev_uc_del(p->dev, addr); | |
145beee8 VY |
152 | } |
153 | } | |
154 | ||
155 | /* When a static FDB entry is deleted, the HW address from that entry is | |
156 | * also removed from the bridge private HW address list and updates all | |
157 | * the ports with needed information. | |
158 | * Called under RTNL. | |
159 | */ | |
020ec6ba | 160 | static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
161 | { |
162 | struct net_bridge_port *p; | |
163 | ||
164 | ASSERT_RTNL(); | |
165 | ||
166 | list_for_each_entry(p, &br->port_list, list) { | |
167 | if (!br_promisc_port(p)) | |
168 | dev_uc_del(p->dev, addr); | |
169 | } | |
170 | } | |
171 | ||
b4ad7baa SF |
172 | static void fdb_del_external_learn(struct net_bridge_fdb_entry *f) |
173 | { | |
52ba57cf | 174 | struct switchdev_obj_port_fdb fdb = { |
56607386 | 175 | .obj = { |
6ff64f6f | 176 | .orig_dev = f->dst->dev, |
56607386 JP |
177 | .id = SWITCHDEV_OBJ_ID_PORT_FDB, |
178 | .flags = SWITCHDEV_F_DEFER, | |
179 | }, | |
ab069002 | 180 | .vid = f->vlan_id, |
b4ad7baa SF |
181 | }; |
182 | ||
850d0cbc | 183 | ether_addr_copy(fdb.addr, f->addr.addr); |
9e8f4a54 | 184 | switchdev_port_obj_del(f->dst->dev, &fdb.obj); |
b4ad7baa SF |
185 | } |
186 | ||
31e8a49c | 187 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
1da177e4 | 188 | { |
145beee8 | 189 | if (f->is_static) |
020ec6ba | 190 | fdb_del_hw_addr(br, f->addr.addr); |
145beee8 | 191 | |
b4ad7baa SF |
192 | if (f->added_by_external_learn) |
193 | fdb_del_external_learn(f); | |
194 | ||
f7cdee8a | 195 | hlist_del_init_rcu(&f->hlist); |
31e8a49c | 196 | fdb_notify(br, f, RTM_DELNEIGH); |
da678292 | 197 | call_rcu(&f->rcu, fdb_rcu_free); |
1da177e4 LT |
198 | } |
199 | ||
960b589f TM |
200 | /* Delete a local entry if no other port had the same address. */ |
201 | static void fdb_delete_local(struct net_bridge *br, | |
202 | const struct net_bridge_port *p, | |
203 | struct net_bridge_fdb_entry *f) | |
204 | { | |
205 | const unsigned char *addr = f->addr.addr; | |
2594e906 NA |
206 | struct net_bridge_vlan_group *vg; |
207 | const struct net_bridge_vlan *v; | |
960b589f | 208 | struct net_bridge_port *op; |
2594e906 | 209 | u16 vid = f->vlan_id; |
960b589f TM |
210 | |
211 | /* Maybe another port has same hw addr? */ | |
212 | list_for_each_entry(op, &br->port_list, list) { | |
2594e906 | 213 | vg = nbp_vlan_group(op); |
960b589f | 214 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && |
2594e906 | 215 | (!vid || br_vlan_find(vg, vid))) { |
960b589f | 216 | f->dst = op; |
a778e6d1 | 217 | f->added_by_user = 0; |
960b589f TM |
218 | return; |
219 | } | |
220 | } | |
221 | ||
2594e906 NA |
222 | vg = br_vlan_group(br); |
223 | v = br_vlan_find(vg, vid); | |
960b589f TM |
224 | /* Maybe bridge device has same hw addr? */ |
225 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
2594e906 | 226 | (!vid || (v && br_vlan_should_use(v)))) { |
960b589f | 227 | f->dst = NULL; |
a778e6d1 | 228 | f->added_by_user = 0; |
960b589f TM |
229 | return; |
230 | } | |
231 | ||
232 | fdb_delete(br, f); | |
233 | } | |
234 | ||
424bb9c9 TM |
235 | void br_fdb_find_delete_local(struct net_bridge *br, |
236 | const struct net_bridge_port *p, | |
237 | const unsigned char *addr, u16 vid) | |
238 | { | |
424bb9c9 TM |
239 | struct net_bridge_fdb_entry *f; |
240 | ||
241 | spin_lock_bh(&br->hash_lock); | |
bfd0aeac | 242 | f = br_fdb_find(br, addr, vid); |
424bb9c9 TM |
243 | if (f && f->is_local && !f->added_by_user && f->dst == p) |
244 | fdb_delete_local(br, p, f); | |
245 | spin_unlock_bh(&br->hash_lock); | |
246 | } | |
247 | ||
1da177e4 LT |
248 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
249 | { | |
2594e906 | 250 | struct net_bridge_vlan_group *vg; |
1da177e4 | 251 | struct net_bridge *br = p->br; |
2594e906 | 252 | struct net_bridge_vlan *v; |
1da177e4 | 253 | int i; |
9d6f229f | 254 | |
1da177e4 LT |
255 | spin_lock_bh(&br->hash_lock); |
256 | ||
2594e906 | 257 | vg = nbp_vlan_group(p); |
1da177e4 LT |
258 | /* Search all chains since old address/hash is unknown */ |
259 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
260 | struct hlist_node *h; | |
261 | hlist_for_each(h, &br->hash[i]) { | |
262 | struct net_bridge_fdb_entry *f; | |
263 | ||
264 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
a5642ab4 | 265 | if (f->dst == p && f->is_local && !f->added_by_user) { |
1da177e4 | 266 | /* delete old one */ |
960b589f TM |
267 | fdb_delete_local(br, p, f); |
268 | ||
bc9a25d2 VY |
269 | /* if this port has no vlan information |
270 | * configured, we can safely be done at | |
271 | * this point. | |
272 | */ | |
2594e906 | 273 | if (!vg || !vg->num_vlans) |
2836882f | 274 | goto insert; |
1da177e4 LT |
275 | } |
276 | } | |
277 | } | |
1da177e4 | 278 | |
2836882f TM |
279 | insert: |
280 | /* insert new address, may fail if invalid address or dup. */ | |
281 | fdb_insert(br, p, newaddr, 0); | |
282 | ||
2594e906 | 283 | if (!vg || !vg->num_vlans) |
2836882f TM |
284 | goto done; |
285 | ||
286 | /* Now add entries for every VLAN configured on the port. | |
287 | * This function runs under RTNL so the bitmap will not change | |
288 | * from under us. | |
289 | */ | |
2594e906 NA |
290 | list_for_each_entry(v, &vg->vlan_list, vlist) |
291 | fdb_insert(br, p, newaddr, v->vid); | |
2836882f | 292 | |
bc9a25d2 | 293 | done: |
1da177e4 LT |
294 | spin_unlock_bh(&br->hash_lock); |
295 | } | |
296 | ||
43598813 | 297 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
298 | { | |
2594e906 | 299 | struct net_bridge_vlan_group *vg; |
43598813 | 300 | struct net_bridge_fdb_entry *f; |
2594e906 | 301 | struct net_bridge_vlan *v; |
43598813 | 302 | |
ac4c8868 TM |
303 | spin_lock_bh(&br->hash_lock); |
304 | ||
43598813 | 305 | /* If old entry was unassociated with any port, then delete it. */ |
bfd0aeac | 306 | f = br_fdb_find(br, br->dev->dev_addr, 0); |
7bb90c37 | 307 | if (f && f->is_local && !f->dst && !f->added_by_user) |
960b589f | 308 | fdb_delete_local(br, NULL, f); |
43598813 | 309 | |
bc9a25d2 | 310 | fdb_insert(br, NULL, newaddr, 0); |
2594e906 NA |
311 | vg = br_vlan_group(br); |
312 | if (!vg || !vg->num_vlans) | |
313 | goto out; | |
bc9a25d2 VY |
314 | /* Now remove and add entries for every VLAN configured on the |
315 | * bridge. This function runs under RTNL so the bitmap will not | |
316 | * change from under us. | |
317 | */ | |
2594e906 | 318 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
0b148def TM |
319 | if (!br_vlan_should_use(v)) |
320 | continue; | |
bfd0aeac | 321 | f = br_fdb_find(br, br->dev->dev_addr, v->vid); |
7bb90c37 | 322 | if (f && f->is_local && !f->dst && !f->added_by_user) |
960b589f | 323 | fdb_delete_local(br, NULL, f); |
2594e906 | 324 | fdb_insert(br, NULL, newaddr, v->vid); |
bc9a25d2 | 325 | } |
ac4c8868 TM |
326 | out: |
327 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 328 | } |
329 | ||
f7cdee8a | 330 | void br_fdb_cleanup(struct work_struct *work) |
1da177e4 | 331 | { |
f7cdee8a NA |
332 | struct net_bridge *br = container_of(work, struct net_bridge, |
333 | gc_work.work); | |
1da177e4 | 334 | unsigned long delay = hold_time(br); |
f7cdee8a NA |
335 | unsigned long work_delay = delay; |
336 | unsigned long now = jiffies; | |
1da177e4 LT |
337 | int i; |
338 | ||
1da177e4 LT |
339 | for (i = 0; i < BR_HASH_SIZE; i++) { |
340 | struct net_bridge_fdb_entry *f; | |
b67bfe0d | 341 | struct hlist_node *n; |
1da177e4 | 342 | |
f7cdee8a NA |
343 | if (!br->hash[i].first) |
344 | continue; | |
345 | ||
346 | spin_lock_bh(&br->hash_lock); | |
b67bfe0d | 347 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
071f7722 | 348 | unsigned long this_timer; |
f7cdee8a | 349 | |
3fcf9011 | 350 | if (f->is_static) |
071f7722 | 351 | continue; |
dcd45e06 SM |
352 | if (f->added_by_external_learn) |
353 | continue; | |
7cd8861a | 354 | this_timer = f->updated + delay; |
f7cdee8a NA |
355 | if (time_after(this_timer, now)) |
356 | work_delay = min(work_delay, this_timer - now); | |
357 | else | |
31e8a49c | 358 | fdb_delete(br, f); |
1da177e4 | 359 | } |
f7cdee8a NA |
360 | spin_unlock_bh(&br->hash_lock); |
361 | cond_resched(); | |
1da177e4 | 362 | } |
1da177e4 | 363 | |
f7cdee8a NA |
364 | /* Cleanup minimum 10 milliseconds apart */ |
365 | work_delay = max_t(unsigned long, work_delay, msecs_to_jiffies(10)); | |
366 | mod_delayed_work(system_long_wq, &br->gc_work, work_delay); | |
1da177e4 LT |
367 | } |
368 | ||
9cf63747 SH |
369 | /* Completely flush all dynamic entries in forwarding database.*/ |
370 | void br_fdb_flush(struct net_bridge *br) | |
371 | { | |
372 | int i; | |
373 | ||
374 | spin_lock_bh(&br->hash_lock); | |
375 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
376 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
377 | struct hlist_node *n; |
378 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 379 | if (!f->is_static) |
31e8a49c | 380 | fdb_delete(br, f); |
9cf63747 SH |
381 | } |
382 | } | |
383 | spin_unlock_bh(&br->hash_lock); | |
384 | } | |
1a620698 | 385 | |
25985edc | 386 | /* Flush all entries referring to a specific port. |
9cf63747 | 387 | * if do_all is set also flush static entries |
1ea2d020 | 388 | * if vid is set delete all entries that match the vlan_id |
9cf63747 | 389 | */ |
1a620698 SH |
390 | void br_fdb_delete_by_port(struct net_bridge *br, |
391 | const struct net_bridge_port *p, | |
1ea2d020 | 392 | u16 vid, |
1a620698 | 393 | int do_all) |
1da177e4 LT |
394 | { |
395 | int i; | |
396 | ||
397 | spin_lock_bh(&br->hash_lock); | |
398 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
399 | struct hlist_node *h, *g; | |
9d6f229f | 400 | |
1da177e4 LT |
401 | hlist_for_each_safe(h, g, &br->hash[i]) { |
402 | struct net_bridge_fdb_entry *f | |
403 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 404 | if (f->dst != p) |
1da177e4 LT |
405 | continue; |
406 | ||
1ea2d020 NA |
407 | if (!do_all) |
408 | if (f->is_static || (vid && f->vlan_id != vid)) | |
409 | continue; | |
1da177e4 | 410 | |
a778e6d1 TM |
411 | if (f->is_local) |
412 | fdb_delete_local(br, p, f); | |
413 | else | |
414 | fdb_delete(br, f); | |
1da177e4 LT |
415 | } |
416 | } | |
417 | spin_unlock_bh(&br->hash_lock); | |
418 | } | |
419 | ||
e6373c4c | 420 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
421 | /* Interface used by ATM LANE hook to test |
422 | * if an addr is on some other bridge port */ | |
423 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
424 | { |
425 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 426 | struct net_bridge_port *port; |
da678292 MM |
427 | int ret; |
428 | ||
1da177e4 | 429 | rcu_read_lock(); |
b5ed54e9 | 430 | port = br_port_get_rcu(dev); |
431 | if (!port) | |
432 | ret = 0; | |
433 | else { | |
bfd0aeac | 434 | fdb = br_fdb_find_rcu(port->br, addr, 0); |
43598813 | 435 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 436 | fdb->dst->state == BR_STATE_FORWARDING; |
437 | } | |
1da177e4 | 438 | rcu_read_unlock(); |
1da177e4 | 439 | |
da678292 | 440 | return ret; |
1da177e4 | 441 | } |
da678292 | 442 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
443 | |
444 | /* | |
9d6f229f | 445 | * Fill buffer with forwarding table records in |
1da177e4 LT |
446 | * the API format. |
447 | */ | |
448 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
449 | unsigned long maxnum, unsigned long skip) | |
450 | { | |
451 | struct __fdb_entry *fe = buf; | |
452 | int i, num = 0; | |
1da177e4 LT |
453 | struct net_bridge_fdb_entry *f; |
454 | ||
455 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
456 | ||
457 | rcu_read_lock(); | |
458 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 459 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
460 | if (num >= maxnum) |
461 | goto out; | |
462 | ||
9d6f229f | 463 | if (has_expired(br, f)) |
1da177e4 LT |
464 | continue; |
465 | ||
43598813 | 466 | /* ignore pseudo entry for local MAC address */ |
467 | if (!f->dst) | |
468 | continue; | |
469 | ||
1da177e4 LT |
470 | if (skip) { |
471 | --skip; | |
472 | continue; | |
473 | } | |
474 | ||
475 | /* convert from internal format to API */ | |
476 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
477 | |
478 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 479 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
480 | fe->port_hi = f->dst->port_no >> 8; |
481 | ||
1da177e4 LT |
482 | fe->is_local = f->is_local; |
483 | if (!f->is_static) | |
a399a805 | 484 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
485 | ++fe; |
486 | ++num; | |
487 | } | |
488 | } | |
489 | ||
490 | out: | |
491 | rcu_read_unlock(); | |
492 | ||
493 | return num; | |
494 | } | |
495 | ||
1da177e4 LT |
496 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, |
497 | struct net_bridge_port *source, | |
2ba071ec | 498 | const unsigned char *addr, |
b7af1472 RP |
499 | __u16 vid, |
500 | unsigned char is_local, | |
501 | unsigned char is_static) | |
1da177e4 LT |
502 | { |
503 | struct net_bridge_fdb_entry *fdb; | |
504 | ||
505 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
506 | if (fdb) { | |
507 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 508 | fdb->dst = source; |
2ba071ec | 509 | fdb->vlan_id = vid; |
b7af1472 RP |
510 | fdb->is_local = is_local; |
511 | fdb->is_static = is_static; | |
a5642ab4 | 512 | fdb->added_by_user = 0; |
cf6b8e1e | 513 | fdb->added_by_external_learn = 0; |
7cd8861a | 514 | fdb->updated = fdb->used = jiffies; |
1158f762 | 515 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
516 | } |
517 | return fdb; | |
518 | } | |
519 | ||
520 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 521 | const unsigned char *addr, u16 vid) |
1da177e4 | 522 | { |
bc9a25d2 | 523 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
524 | struct net_bridge_fdb_entry *fdb; |
525 | ||
526 | if (!is_valid_ether_addr(addr)) | |
527 | return -EINVAL; | |
528 | ||
bfd0aeac | 529 | fdb = br_fdb_find(br, addr, vid); |
1da177e4 | 530 | if (fdb) { |
9d6f229f | 531 | /* it is okay to have multiple ports with same |
1da177e4 LT |
532 | * address, just use the first one. |
533 | */ | |
9d6f229f | 534 | if (fdb->is_local) |
1da177e4 | 535 | return 0; |
de1dfeef RP |
536 | br_warn(br, "adding interface %s with same address as a received packet (addr:%pM, vlan:%u)\n", |
537 | source ? source->dev->name : br->dev->name, addr, vid); | |
31e8a49c | 538 | fdb_delete(br, fdb); |
9d6f229f | 539 | } |
1da177e4 | 540 | |
b7af1472 | 541 | fdb = fdb_create(head, source, addr, vid, 1, 1); |
03e9b64b | 542 | if (!fdb) |
1da177e4 LT |
543 | return -ENOMEM; |
544 | ||
020ec6ba | 545 | fdb_add_hw_addr(br, addr); |
31e8a49c | 546 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
547 | return 0; |
548 | } | |
549 | ||
03e9b64b | 550 | /* Add entry for local address of interface */ |
1da177e4 | 551 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 552 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
553 | { |
554 | int ret; | |
555 | ||
556 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 557 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
558 | spin_unlock_bh(&br->hash_lock); |
559 | return ret; | |
560 | } | |
561 | ||
562 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 563 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 564 | { |
2ba071ec | 565 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 566 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 567 | bool fdb_modified = false; |
1da177e4 LT |
568 | |
569 | /* some users want to always flood. */ | |
570 | if (hold_time(br) == 0) | |
571 | return; | |
572 | ||
df1c0b84 SH |
573 | /* ignore packets unless we are using this port */ |
574 | if (!(source->state == BR_STATE_LEARNING || | |
575 | source->state == BR_STATE_FORWARDING)) | |
576 | return; | |
577 | ||
2ba071ec | 578 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
579 | if (likely(fdb)) { |
580 | /* attempt to update an entry for a local interface */ | |
581 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 582 | if (net_ratelimit()) |
de1dfeef RP |
583 | br_warn(br, "received packet on %s with own address as source address (addr:%pM, vlan:%u)\n", |
584 | source->dev->name, addr, vid); | |
1da177e4 | 585 | } else { |
ca6d4480 | 586 | unsigned long now = jiffies; |
587 | ||
1da177e4 | 588 | /* fastpath: update of existing entry */ |
c65c7a30 JM |
589 | if (unlikely(source != fdb->dst)) { |
590 | fdb->dst = source; | |
591 | fdb_modified = true; | |
592 | } | |
ca6d4480 | 593 | if (now != fdb->updated) |
594 | fdb->updated = now; | |
a5642ab4 TM |
595 | if (unlikely(added_by_user)) |
596 | fdb->added_by_user = 1; | |
7e26bf45 | 597 | /* Take over HW learned entry */ |
cab93af0 | 598 | if (unlikely(fdb->added_by_external_learn)) { |
7e26bf45 | 599 | fdb->added_by_external_learn = 0; |
cab93af0 NA |
600 | fdb_modified = true; |
601 | } | |
c65c7a30 JM |
602 | if (unlikely(fdb_modified)) |
603 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1da177e4 LT |
604 | } |
605 | } else { | |
f8ae737d | 606 | spin_lock(&br->hash_lock); |
bfd0aeac | 607 | if (likely(!fdb_find_rcu(head, addr, vid))) { |
b7af1472 | 608 | fdb = fdb_create(head, source, addr, vid, 0, 0); |
a5642ab4 TM |
609 | if (fdb) { |
610 | if (unlikely(added_by_user)) | |
611 | fdb->added_by_user = 1; | |
31e8a49c | 612 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 613 | } |
f58ee4e1 | 614 | } |
1da177e4 LT |
615 | /* else we lose race and someone else inserts |
616 | * it first, don't bother updating | |
617 | */ | |
f8ae737d | 618 | spin_unlock(&br->hash_lock); |
1da177e4 | 619 | } |
1da177e4 | 620 | } |
b078f0df | 621 | |
3741873b RP |
622 | static int fdb_to_nud(const struct net_bridge *br, |
623 | const struct net_bridge_fdb_entry *fdb) | |
b078f0df | 624 | { |
625 | if (fdb->is_local) | |
626 | return NUD_PERMANENT; | |
627 | else if (fdb->is_static) | |
628 | return NUD_NOARP; | |
3741873b | 629 | else if (has_expired(br, fdb)) |
b078f0df | 630 | return NUD_STALE; |
631 | else | |
632 | return NUD_REACHABLE; | |
633 | } | |
634 | ||
31e8a49c | 635 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 636 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 637 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 638 | { |
639 | unsigned long now = jiffies; | |
640 | struct nda_cacheinfo ci; | |
641 | struct nlmsghdr *nlh; | |
642 | struct ndmsg *ndm; | |
643 | ||
15e47304 | 644 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 645 | if (nlh == NULL) |
646 | return -EMSGSIZE; | |
647 | ||
b078f0df | 648 | ndm = nlmsg_data(nlh); |
649 | ndm->ndm_family = AF_BRIDGE; | |
650 | ndm->ndm_pad1 = 0; | |
651 | ndm->ndm_pad2 = 0; | |
cf6b8e1e | 652 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
b078f0df | 653 | ndm->ndm_type = 0; |
43598813 | 654 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
3741873b | 655 | ndm->ndm_state = fdb_to_nud(br, fdb); |
b078f0df | 656 | |
2eb812e6 DM |
657 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
658 | goto nla_put_failure; | |
41c389d7 RP |
659 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
660 | goto nla_put_failure; | |
b078f0df | 661 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
662 | ci.ndm_confirmed = 0; | |
663 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
664 | ci.ndm_refcnt = 0; | |
2eb812e6 DM |
665 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
666 | goto nla_put_failure; | |
1690be63 | 667 | |
47fab41a | 668 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
1690be63 VY |
669 | goto nla_put_failure; |
670 | ||
053c095a JB |
671 | nlmsg_end(skb, nlh); |
672 | return 0; | |
b078f0df | 673 | |
674 | nla_put_failure: | |
675 | nlmsg_cancel(skb, nlh); | |
676 | return -EMSGSIZE; | |
677 | } | |
678 | ||
679 | static inline size_t fdb_nlmsg_size(void) | |
680 | { | |
681 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
682 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
41c389d7 | 683 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
1690be63 | 684 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df | 685 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
686 | } | |
687 | ||
31e8a49c | 688 | static void fdb_notify(struct net_bridge *br, |
689 | const struct net_bridge_fdb_entry *fdb, int type) | |
b078f0df | 690 | { |
31e8a49c | 691 | struct net *net = dev_net(br->dev); |
b078f0df | 692 | struct sk_buff *skb; |
693 | int err = -ENOBUFS; | |
694 | ||
695 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
696 | if (skb == NULL) | |
697 | goto errout; | |
698 | ||
31e8a49c | 699 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 700 | if (err < 0) { |
701 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
702 | WARN_ON(err == -EMSGSIZE); | |
703 | kfree_skb(skb); | |
704 | goto errout; | |
705 | } | |
706 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
707 | return; | |
708 | errout: | |
87e823b3 | 709 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 710 | } |
711 | ||
712 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
713 | int br_fdb_dump(struct sk_buff *skb, |
714 | struct netlink_callback *cb, | |
715 | struct net_device *dev, | |
5d5eacb3 | 716 | struct net_device *filter_dev, |
d297653d | 717 | int *idx) |
b078f0df | 718 | { |
77162022 | 719 | struct net_bridge *br = netdev_priv(dev); |
d297653d | 720 | int err = 0; |
77162022 | 721 | int i; |
b078f0df | 722 | |
77162022 JF |
723 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
724 | goto out; | |
b078f0df | 725 | |
d297653d RP |
726 | if (!filter_dev) { |
727 | err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
728 | if (err < 0) | |
729 | goto out; | |
730 | } | |
6cb69742 | 731 | |
77162022 | 732 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 733 | struct net_bridge_fdb_entry *f; |
b078f0df | 734 | |
b67bfe0d | 735 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
472681d5 | 736 | |
d297653d | 737 | if (*idx < cb->args[2]) |
77162022 JF |
738 | goto skip; |
739 | ||
5e6d2435 JHS |
740 | if (filter_dev && |
741 | (!f->dst || f->dst->dev != filter_dev)) { | |
742 | if (filter_dev != dev) | |
743 | goto skip; | |
6cb69742 | 744 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
745 | * It means the MAC belongs to the bridge |
746 | * Therefore need a little more filtering | |
747 | * we only want to dump the !f->dst case | |
748 | */ | |
749 | if (f->dst) | |
750 | goto skip; | |
751 | } | |
6cb69742 HS |
752 | if (!filter_dev && f->dst) |
753 | goto skip; | |
5d5eacb3 | 754 | |
472681d5 MM |
755 | err = fdb_fill_info(skb, br, f, |
756 | NETLINK_CB(cb->skb).portid, | |
757 | cb->nlh->nlmsg_seq, | |
758 | RTM_NEWNEIGH, | |
759 | NLM_F_MULTI); | |
d297653d RP |
760 | if (err < 0) |
761 | goto out; | |
b078f0df | 762 | skip: |
d297653d | 763 | *idx += 1; |
b078f0df | 764 | } |
765 | } | |
b078f0df | 766 | |
77162022 | 767 | out: |
d297653d | 768 | return err; |
b078f0df | 769 | } |
36fd2b63 | 770 | |
292d1398 | 771 | /* Update (create or replace) forwarding database entry */ |
7bb90c37 TM |
772 | static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source, |
773 | const __u8 *addr, __u16 state, __u16 flags, __u16 vid) | |
36fd2b63 | 774 | { |
2ba071ec | 775 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 776 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 777 | bool modified = false; |
36fd2b63 | 778 | |
eb8d7baa | 779 | /* If the port cannot learn allow only local and static entries */ |
7bb90c37 | 780 | if (source && !(state & NUD_PERMANENT) && !(state & NUD_NOARP) && |
eb8d7baa WK |
781 | !(source->state == BR_STATE_LEARNING || |
782 | source->state == BR_STATE_FORWARDING)) | |
783 | return -EPERM; | |
784 | ||
7bb90c37 TM |
785 | if (!source && !(state & NUD_PERMANENT)) { |
786 | pr_info("bridge: RTM_NEWNEIGH %s without NUD_PERMANENT\n", | |
787 | br->dev->name); | |
788 | return -EINVAL; | |
789 | } | |
790 | ||
bfd0aeac | 791 | fdb = br_fdb_find(br, addr, vid); |
64af1bac | 792 | if (fdb == NULL) { |
793 | if (!(flags & NLM_F_CREATE)) | |
794 | return -ENOENT; | |
36fd2b63 | 795 | |
b7af1472 | 796 | fdb = fdb_create(head, source, addr, vid, 0, 0); |
64af1bac | 797 | if (!fdb) |
798 | return -ENOMEM; | |
b0a397fb | 799 | |
800 | modified = true; | |
64af1bac | 801 | } else { |
802 | if (flags & NLM_F_EXCL) | |
803 | return -EEXIST; | |
b0a397fb | 804 | |
805 | if (fdb->dst != source) { | |
806 | fdb->dst = source; | |
807 | modified = true; | |
808 | } | |
292d1398 | 809 | } |
810 | ||
3741873b | 811 | if (fdb_to_nud(br, fdb) != state) { |
145beee8 VY |
812 | if (state & NUD_PERMANENT) { |
813 | fdb->is_local = 1; | |
814 | if (!fdb->is_static) { | |
815 | fdb->is_static = 1; | |
020ec6ba | 816 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
817 | } |
818 | } else if (state & NUD_NOARP) { | |
819 | fdb->is_local = 0; | |
820 | if (!fdb->is_static) { | |
821 | fdb->is_static = 1; | |
020ec6ba | 822 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
823 | } |
824 | } else { | |
292d1398 | 825 | fdb->is_local = 0; |
145beee8 VY |
826 | if (fdb->is_static) { |
827 | fdb->is_static = 0; | |
020ec6ba | 828 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
829 | } |
830 | } | |
64af1bac | 831 | |
b0a397fb | 832 | modified = true; |
833 | } | |
a5642ab4 | 834 | fdb->added_by_user = 1; |
b0a397fb | 835 | |
836 | fdb->used = jiffies; | |
837 | if (modified) { | |
838 | fdb->updated = jiffies; | |
31e8a49c | 839 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 840 | } |
36fd2b63 | 841 | |
36fd2b63 | 842 | return 0; |
843 | } | |
844 | ||
7bb90c37 TM |
845 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br, |
846 | struct net_bridge_port *p, const unsigned char *addr, | |
847 | u16 nlh_flags, u16 vid) | |
1690be63 VY |
848 | { |
849 | int err = 0; | |
850 | ||
851 | if (ndm->ndm_flags & NTF_USE) { | |
7bb90c37 TM |
852 | if (!p) { |
853 | pr_info("bridge: RTM_NEWNEIGH %s with NTF_USE is not supported\n", | |
854 | br->dev->name); | |
855 | return -EINVAL; | |
856 | } | |
c4c832f8 | 857 | local_bh_disable(); |
1690be63 | 858 | rcu_read_lock(); |
7bb90c37 | 859 | br_fdb_update(br, p, addr, vid, true); |
1690be63 | 860 | rcu_read_unlock(); |
c4c832f8 | 861 | local_bh_enable(); |
eb100e0e NA |
862 | } else if (ndm->ndm_flags & NTF_EXT_LEARNED) { |
863 | err = br_fdb_external_learn_add(br, p, addr, vid); | |
1690be63 | 864 | } else { |
7bb90c37 TM |
865 | spin_lock_bh(&br->hash_lock); |
866 | err = fdb_add_entry(br, p, addr, ndm->ndm_state, | |
1690be63 | 867 | nlh_flags, vid); |
7bb90c37 | 868 | spin_unlock_bh(&br->hash_lock); |
1690be63 VY |
869 | } |
870 | ||
871 | return err; | |
872 | } | |
873 | ||
36fd2b63 | 874 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 875 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
876 | struct net_device *dev, | |
f6f6424b | 877 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
36fd2b63 | 878 | { |
2594e906 | 879 | struct net_bridge_vlan_group *vg; |
3741873b | 880 | struct net_bridge_port *p = NULL; |
2594e906 | 881 | struct net_bridge_vlan *v; |
3741873b | 882 | struct net_bridge *br = NULL; |
77162022 | 883 | int err = 0; |
36fd2b63 | 884 | |
292d1398 | 885 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
886 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
887 | return -EINVAL; | |
888 | } | |
889 | ||
537f7f84 SH |
890 | if (is_zero_ether_addr(addr)) { |
891 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
892 | return -EINVAL; | |
893 | } | |
894 | ||
3741873b RP |
895 | if (dev->priv_flags & IFF_EBRIDGE) { |
896 | br = netdev_priv(dev); | |
897 | vg = br_vlan_group(br); | |
898 | } else { | |
899 | p = br_port_get_rtnl(dev); | |
900 | if (!p) { | |
901 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
902 | dev->name); | |
903 | return -EINVAL; | |
904 | } | |
7bb90c37 | 905 | br = p->br; |
3741873b | 906 | vg = nbp_vlan_group(p); |
36fd2b63 | 907 | } |
908 | ||
f6f6424b | 909 | if (vid) { |
2594e906 | 910 | v = br_vlan_find(vg, vid); |
3741873b RP |
911 | if (!v || !br_vlan_should_use(v)) { |
912 | pr_info("bridge: RTM_NEWNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); | |
1690be63 VY |
913 | return -EINVAL; |
914 | } | |
915 | ||
916 | /* VID was specified, so use it. */ | |
7bb90c37 | 917 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, vid); |
292d1398 | 918 | } else { |
7bb90c37 | 919 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, 0); |
2594e906 | 920 | if (err || !vg || !vg->num_vlans) |
1690be63 | 921 | goto out; |
1690be63 VY |
922 | |
923 | /* We have vlans configured on this port and user didn't | |
924 | * specify a VLAN. To be nice, add/update entry for every | |
925 | * vlan on this port. | |
926 | */ | |
2594e906 | 927 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
3741873b RP |
928 | if (!br_vlan_should_use(v)) |
929 | continue; | |
7bb90c37 | 930 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, v->vid); |
1690be63 VY |
931 | if (err) |
932 | goto out; | |
1690be63 | 933 | } |
292d1398 | 934 | } |
36fd2b63 | 935 | |
1690be63 | 936 | out: |
36fd2b63 | 937 | return err; |
938 | } | |
939 | ||
5019ab50 NA |
940 | static int fdb_delete_by_addr_and_port(struct net_bridge *br, |
941 | const struct net_bridge_port *p, | |
8c86f967 | 942 | const u8 *addr, u16 vlan) |
36fd2b63 | 943 | { |
36fd2b63 | 944 | struct net_bridge_fdb_entry *fdb; |
945 | ||
bfd0aeac | 946 | fdb = br_fdb_find(br, addr, vlan); |
8c86f967 | 947 | if (!fdb || fdb->dst != p) |
36fd2b63 | 948 | return -ENOENT; |
949 | ||
1690be63 | 950 | fdb_delete(br, fdb); |
5019ab50 | 951 | |
36fd2b63 | 952 | return 0; |
953 | } | |
954 | ||
5019ab50 NA |
955 | static int __br_fdb_delete(struct net_bridge *br, |
956 | const struct net_bridge_port *p, | |
1690be63 VY |
957 | const unsigned char *addr, u16 vid) |
958 | { | |
959 | int err; | |
960 | ||
5019ab50 NA |
961 | spin_lock_bh(&br->hash_lock); |
962 | err = fdb_delete_by_addr_and_port(br, p, addr, vid); | |
963 | spin_unlock_bh(&br->hash_lock); | |
1690be63 VY |
964 | |
965 | return err; | |
966 | } | |
967 | ||
36fd2b63 | 968 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
969 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
970 | struct net_device *dev, | |
f6f6424b | 971 | const unsigned char *addr, u16 vid) |
36fd2b63 | 972 | { |
2594e906 | 973 | struct net_bridge_vlan_group *vg; |
3741873b | 974 | struct net_bridge_port *p = NULL; |
2594e906 | 975 | struct net_bridge_vlan *v; |
5019ab50 | 976 | struct net_bridge *br; |
36fd2b63 | 977 | int err; |
1690be63 | 978 | |
3741873b RP |
979 | if (dev->priv_flags & IFF_EBRIDGE) { |
980 | br = netdev_priv(dev); | |
981 | vg = br_vlan_group(br); | |
982 | } else { | |
983 | p = br_port_get_rtnl(dev); | |
984 | if (!p) { | |
985 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
986 | dev->name); | |
987 | return -EINVAL; | |
988 | } | |
989 | vg = nbp_vlan_group(p); | |
5019ab50 | 990 | br = p->br; |
36fd2b63 | 991 | } |
992 | ||
f6f6424b | 993 | if (vid) { |
2594e906 NA |
994 | v = br_vlan_find(vg, vid); |
995 | if (!v) { | |
3741873b | 996 | pr_info("bridge: RTM_DELNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); |
1690be63 VY |
997 | return -EINVAL; |
998 | } | |
36fd2b63 | 999 | |
5019ab50 | 1000 | err = __br_fdb_delete(br, p, addr, vid); |
1690be63 | 1001 | } else { |
25d3b493 | 1002 | err = -ENOENT; |
5019ab50 | 1003 | err &= __br_fdb_delete(br, p, addr, 0); |
2594e906 | 1004 | if (!vg || !vg->num_vlans) |
5019ab50 | 1005 | return err; |
1690be63 | 1006 | |
3741873b RP |
1007 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
1008 | if (!br_vlan_should_use(v)) | |
1009 | continue; | |
5019ab50 | 1010 | err &= __br_fdb_delete(br, p, addr, v->vid); |
3741873b | 1011 | } |
1690be63 | 1012 | } |
5019ab50 | 1013 | |
36fd2b63 | 1014 | return err; |
1015 | } | |
8db24af7 VY |
1016 | |
1017 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1018 | { | |
1019 | struct net_bridge_fdb_entry *fdb, *tmp; | |
1020 | int i; | |
1021 | int err; | |
1022 | ||
1023 | ASSERT_RTNL(); | |
1024 | ||
1025 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1026 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
1027 | /* We only care for static entries */ | |
1028 | if (!fdb->is_static) | |
1029 | continue; | |
1030 | ||
1031 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
1032 | if (err) | |
1033 | goto rollback; | |
1034 | } | |
1035 | } | |
1036 | return 0; | |
1037 | ||
1038 | rollback: | |
1039 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1040 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
1041 | /* If we reached the fdb that failed, we can stop */ | |
1042 | if (tmp == fdb) | |
1043 | break; | |
1044 | ||
1045 | /* We only care for static entries */ | |
1046 | if (!tmp->is_static) | |
1047 | continue; | |
1048 | ||
1049 | dev_uc_del(p->dev, tmp->addr.addr); | |
1050 | } | |
1051 | } | |
1052 | return err; | |
1053 | } | |
1054 | ||
1055 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1056 | { | |
1057 | struct net_bridge_fdb_entry *fdb; | |
1058 | int i; | |
1059 | ||
1060 | ASSERT_RTNL(); | |
1061 | ||
1062 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1063 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
1064 | /* We only care for static entries */ | |
1065 | if (!fdb->is_static) | |
1066 | continue; | |
1067 | ||
1068 | dev_uc_del(p->dev, fdb->addr.addr); | |
1069 | } | |
1070 | } | |
1071 | } | |
cf6b8e1e | 1072 | |
3aeb6617 | 1073 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1074 | const unsigned char *addr, u16 vid) |
1075 | { | |
cf6b8e1e SF |
1076 | struct hlist_head *head; |
1077 | struct net_bridge_fdb_entry *fdb; | |
1078 | int err = 0; | |
1079 | ||
3aeb6617 | 1080 | ASSERT_RTNL(); |
cf6b8e1e SF |
1081 | spin_lock_bh(&br->hash_lock); |
1082 | ||
1083 | head = &br->hash[br_mac_hash(addr, vid)]; | |
bfd0aeac | 1084 | fdb = br_fdb_find(br, addr, vid); |
cf6b8e1e | 1085 | if (!fdb) { |
b7af1472 | 1086 | fdb = fdb_create(head, p, addr, vid, 0, 0); |
cf6b8e1e SF |
1087 | if (!fdb) { |
1088 | err = -ENOMEM; | |
1089 | goto err_unlock; | |
1090 | } | |
1091 | fdb->added_by_external_learn = 1; | |
1092 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1093 | } else if (fdb->added_by_external_learn) { | |
1094 | /* Refresh entry */ | |
1095 | fdb->updated = fdb->used = jiffies; | |
1096 | } else if (!fdb->added_by_user) { | |
1097 | /* Take over SW learned entry */ | |
1098 | fdb->added_by_external_learn = 1; | |
1099 | fdb->updated = jiffies; | |
1100 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1101 | } | |
1102 | ||
1103 | err_unlock: | |
1104 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1105 | |
1106 | return err; | |
1107 | } | |
cf6b8e1e | 1108 | |
3aeb6617 | 1109 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1110 | const unsigned char *addr, u16 vid) |
1111 | { | |
cf6b8e1e SF |
1112 | struct net_bridge_fdb_entry *fdb; |
1113 | int err = 0; | |
1114 | ||
3aeb6617 | 1115 | ASSERT_RTNL(); |
cf6b8e1e SF |
1116 | spin_lock_bh(&br->hash_lock); |
1117 | ||
bfd0aeac | 1118 | fdb = br_fdb_find(br, addr, vid); |
cf6b8e1e SF |
1119 | if (fdb && fdb->added_by_external_learn) |
1120 | fdb_delete(br, fdb); | |
1121 | else | |
1122 | err = -ENOENT; | |
1123 | ||
1124 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1125 | |
1126 | return err; | |
1127 | } |