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> |
b74fd306 | 28 | #include <trace/events/bridge.h> |
1da177e4 LT |
29 | #include "br_private.h" |
30 | ||
e18b890b | 31 | static struct kmem_cache *br_fdb_cache __read_mostly; |
1da177e4 | 32 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 33 | const unsigned char *addr, u16 vid); |
31e8a49c | 34 | static void fdb_notify(struct net_bridge *br, |
35 | const struct net_bridge_fdb_entry *, int); | |
1da177e4 | 36 | |
3f890923 SH |
37 | static u32 fdb_salt __read_mostly; |
38 | ||
87a596e0 | 39 | int __init br_fdb_init(void) |
1da177e4 LT |
40 | { |
41 | br_fdb_cache = kmem_cache_create("bridge_fdb_cache", | |
42 | sizeof(struct net_bridge_fdb_entry), | |
43 | 0, | |
20c2df83 | 44 | SLAB_HWCACHE_ALIGN, NULL); |
87a596e0 AM |
45 | if (!br_fdb_cache) |
46 | return -ENOMEM; | |
47 | ||
3f890923 | 48 | get_random_bytes(&fdb_salt, sizeof(fdb_salt)); |
87a596e0 | 49 | return 0; |
1da177e4 LT |
50 | } |
51 | ||
73afc906 | 52 | void br_fdb_fini(void) |
1da177e4 LT |
53 | { |
54 | kmem_cache_destroy(br_fdb_cache); | |
55 | } | |
56 | ||
57 | ||
58 | /* if topology_changing then use forward_delay (default 15 sec) | |
59 | * otherwise keep longer (default 5 minutes) | |
60 | */ | |
3f890923 | 61 | static inline unsigned long hold_time(const struct net_bridge *br) |
1da177e4 LT |
62 | { |
63 | return br->topology_change ? br->forward_delay : br->ageing_time; | |
64 | } | |
65 | ||
3f890923 | 66 | static inline int has_expired(const struct net_bridge *br, |
1da177e4 LT |
67 | const struct net_bridge_fdb_entry *fdb) |
68 | { | |
eda7a5e8 | 69 | return !fdb->is_static && !fdb->added_by_external_learn && |
7cd8861a | 70 | time_before_eq(fdb->updated + hold_time(br), jiffies); |
1da177e4 LT |
71 | } |
72 | ||
2ba071ec | 73 | static inline int br_mac_hash(const unsigned char *mac, __u16 vid) |
1da177e4 | 74 | { |
2ba071ec | 75 | /* use 1 byte of OUI and 3 bytes of NIC */ |
3f890923 | 76 | u32 key = get_unaligned((u32 *)(mac + 2)); |
2ba071ec | 77 | return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1); |
1da177e4 LT |
78 | } |
79 | ||
da678292 MM |
80 | static void fdb_rcu_free(struct rcu_head *head) |
81 | { | |
82 | struct net_bridge_fdb_entry *ent | |
83 | = container_of(head, struct net_bridge_fdb_entry, rcu); | |
84 | kmem_cache_free(br_fdb_cache, ent); | |
85 | } | |
86 | ||
bfd0aeac NA |
87 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, |
88 | const unsigned char *addr, | |
89 | __u16 vid) | |
90 | { | |
91 | struct net_bridge_fdb_entry *f; | |
92 | ||
410b3d48 NA |
93 | WARN_ON_ONCE(!rcu_read_lock_held()); |
94 | ||
bfd0aeac NA |
95 | hlist_for_each_entry_rcu(f, head, hlist) |
96 | if (ether_addr_equal(f->addr.addr, addr) && f->vlan_id == vid) | |
97 | break; | |
98 | ||
99 | return f; | |
100 | } | |
101 | ||
102 | /* requires bridge hash_lock */ | |
103 | static struct net_bridge_fdb_entry *br_fdb_find(struct net_bridge *br, | |
104 | const unsigned char *addr, | |
105 | __u16 vid) | |
106 | { | |
107 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
108 | struct net_bridge_fdb_entry *fdb; | |
109 | ||
d12c9176 | 110 | lockdep_assert_held_once(&br->hash_lock); |
410b3d48 | 111 | |
bfd0aeac NA |
112 | rcu_read_lock(); |
113 | fdb = fdb_find_rcu(head, addr, vid); | |
114 | rcu_read_unlock(); | |
115 | ||
116 | return fdb; | |
117 | } | |
118 | ||
119 | struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, | |
120 | const unsigned char *addr, | |
121 | __u16 vid) | |
122 | { | |
123 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
124 | ||
125 | return fdb_find_rcu(head, addr, vid); | |
126 | } | |
127 | ||
145beee8 VY |
128 | /* When a static FDB entry is added, the mac address from the entry is |
129 | * added to the bridge private HW address list and all required ports | |
130 | * are then updated with the new information. | |
131 | * Called under RTNL. | |
132 | */ | |
020ec6ba | 133 | static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
134 | { |
135 | int err; | |
a3f5ee71 | 136 | struct net_bridge_port *p; |
145beee8 VY |
137 | |
138 | ASSERT_RTNL(); | |
139 | ||
140 | list_for_each_entry(p, &br->port_list, list) { | |
141 | if (!br_promisc_port(p)) { | |
142 | err = dev_uc_add(p->dev, addr); | |
143 | if (err) | |
144 | goto undo; | |
145 | } | |
146 | } | |
147 | ||
148 | return; | |
149 | undo: | |
a3f5ee71 LR |
150 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
151 | if (!br_promisc_port(p)) | |
152 | dev_uc_del(p->dev, addr); | |
145beee8 VY |
153 | } |
154 | } | |
155 | ||
156 | /* When a static FDB entry is deleted, the HW address from that entry is | |
157 | * also removed from the bridge private HW address list and updates all | |
158 | * the ports with needed information. | |
159 | * Called under RTNL. | |
160 | */ | |
020ec6ba | 161 | static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
162 | { |
163 | struct net_bridge_port *p; | |
164 | ||
165 | ASSERT_RTNL(); | |
166 | ||
167 | list_for_each_entry(p, &br->port_list, list) { | |
168 | if (!br_promisc_port(p)) | |
169 | dev_uc_del(p->dev, addr); | |
170 | } | |
171 | } | |
172 | ||
31e8a49c | 173 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
1da177e4 | 174 | { |
b74fd306 RP |
175 | trace_fdb_delete(br, f); |
176 | ||
145beee8 | 177 | if (f->is_static) |
020ec6ba | 178 | fdb_del_hw_addr(br, f->addr.addr); |
145beee8 | 179 | |
f7cdee8a | 180 | hlist_del_init_rcu(&f->hlist); |
31e8a49c | 181 | fdb_notify(br, f, RTM_DELNEIGH); |
da678292 | 182 | call_rcu(&f->rcu, fdb_rcu_free); |
1da177e4 LT |
183 | } |
184 | ||
960b589f TM |
185 | /* Delete a local entry if no other port had the same address. */ |
186 | static void fdb_delete_local(struct net_bridge *br, | |
187 | const struct net_bridge_port *p, | |
188 | struct net_bridge_fdb_entry *f) | |
189 | { | |
190 | const unsigned char *addr = f->addr.addr; | |
2594e906 NA |
191 | struct net_bridge_vlan_group *vg; |
192 | const struct net_bridge_vlan *v; | |
960b589f | 193 | struct net_bridge_port *op; |
2594e906 | 194 | u16 vid = f->vlan_id; |
960b589f TM |
195 | |
196 | /* Maybe another port has same hw addr? */ | |
197 | list_for_each_entry(op, &br->port_list, list) { | |
2594e906 | 198 | vg = nbp_vlan_group(op); |
960b589f | 199 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && |
2594e906 | 200 | (!vid || br_vlan_find(vg, vid))) { |
960b589f | 201 | f->dst = op; |
a778e6d1 | 202 | f->added_by_user = 0; |
960b589f TM |
203 | return; |
204 | } | |
205 | } | |
206 | ||
2594e906 NA |
207 | vg = br_vlan_group(br); |
208 | v = br_vlan_find(vg, vid); | |
960b589f TM |
209 | /* Maybe bridge device has same hw addr? */ |
210 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
2594e906 | 211 | (!vid || (v && br_vlan_should_use(v)))) { |
960b589f | 212 | f->dst = NULL; |
a778e6d1 | 213 | f->added_by_user = 0; |
960b589f TM |
214 | return; |
215 | } | |
216 | ||
217 | fdb_delete(br, f); | |
218 | } | |
219 | ||
424bb9c9 TM |
220 | void br_fdb_find_delete_local(struct net_bridge *br, |
221 | const struct net_bridge_port *p, | |
222 | const unsigned char *addr, u16 vid) | |
223 | { | |
424bb9c9 TM |
224 | struct net_bridge_fdb_entry *f; |
225 | ||
226 | spin_lock_bh(&br->hash_lock); | |
bfd0aeac | 227 | f = br_fdb_find(br, addr, vid); |
424bb9c9 TM |
228 | if (f && f->is_local && !f->added_by_user && f->dst == p) |
229 | fdb_delete_local(br, p, f); | |
230 | spin_unlock_bh(&br->hash_lock); | |
231 | } | |
232 | ||
1da177e4 LT |
233 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
234 | { | |
2594e906 | 235 | struct net_bridge_vlan_group *vg; |
1da177e4 | 236 | struct net_bridge *br = p->br; |
2594e906 | 237 | struct net_bridge_vlan *v; |
1da177e4 | 238 | int i; |
9d6f229f | 239 | |
1da177e4 LT |
240 | spin_lock_bh(&br->hash_lock); |
241 | ||
2594e906 | 242 | vg = nbp_vlan_group(p); |
1da177e4 LT |
243 | /* Search all chains since old address/hash is unknown */ |
244 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
245 | struct hlist_node *h; | |
246 | hlist_for_each(h, &br->hash[i]) { | |
247 | struct net_bridge_fdb_entry *f; | |
248 | ||
249 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
a5642ab4 | 250 | if (f->dst == p && f->is_local && !f->added_by_user) { |
1da177e4 | 251 | /* delete old one */ |
960b589f TM |
252 | fdb_delete_local(br, p, f); |
253 | ||
bc9a25d2 VY |
254 | /* if this port has no vlan information |
255 | * configured, we can safely be done at | |
256 | * this point. | |
257 | */ | |
2594e906 | 258 | if (!vg || !vg->num_vlans) |
2836882f | 259 | goto insert; |
1da177e4 LT |
260 | } |
261 | } | |
262 | } | |
1da177e4 | 263 | |
2836882f TM |
264 | insert: |
265 | /* insert new address, may fail if invalid address or dup. */ | |
266 | fdb_insert(br, p, newaddr, 0); | |
267 | ||
2594e906 | 268 | if (!vg || !vg->num_vlans) |
2836882f TM |
269 | goto done; |
270 | ||
271 | /* Now add entries for every VLAN configured on the port. | |
272 | * This function runs under RTNL so the bitmap will not change | |
273 | * from under us. | |
274 | */ | |
2594e906 NA |
275 | list_for_each_entry(v, &vg->vlan_list, vlist) |
276 | fdb_insert(br, p, newaddr, v->vid); | |
2836882f | 277 | |
bc9a25d2 | 278 | done: |
1da177e4 LT |
279 | spin_unlock_bh(&br->hash_lock); |
280 | } | |
281 | ||
43598813 | 282 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
283 | { | |
2594e906 | 284 | struct net_bridge_vlan_group *vg; |
43598813 | 285 | struct net_bridge_fdb_entry *f; |
2594e906 | 286 | struct net_bridge_vlan *v; |
43598813 | 287 | |
ac4c8868 TM |
288 | spin_lock_bh(&br->hash_lock); |
289 | ||
43598813 | 290 | /* If old entry was unassociated with any port, then delete it. */ |
bfd0aeac | 291 | f = br_fdb_find(br, br->dev->dev_addr, 0); |
7bb90c37 | 292 | if (f && f->is_local && !f->dst && !f->added_by_user) |
960b589f | 293 | fdb_delete_local(br, NULL, f); |
43598813 | 294 | |
bc9a25d2 | 295 | fdb_insert(br, NULL, newaddr, 0); |
2594e906 NA |
296 | vg = br_vlan_group(br); |
297 | if (!vg || !vg->num_vlans) | |
298 | goto out; | |
bc9a25d2 VY |
299 | /* Now remove and add entries for every VLAN configured on the |
300 | * bridge. This function runs under RTNL so the bitmap will not | |
301 | * change from under us. | |
302 | */ | |
2594e906 | 303 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
0b148def TM |
304 | if (!br_vlan_should_use(v)) |
305 | continue; | |
bfd0aeac | 306 | f = br_fdb_find(br, br->dev->dev_addr, v->vid); |
7bb90c37 | 307 | if (f && f->is_local && !f->dst && !f->added_by_user) |
960b589f | 308 | fdb_delete_local(br, NULL, f); |
2594e906 | 309 | fdb_insert(br, NULL, newaddr, v->vid); |
bc9a25d2 | 310 | } |
ac4c8868 TM |
311 | out: |
312 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 313 | } |
314 | ||
f7cdee8a | 315 | void br_fdb_cleanup(struct work_struct *work) |
1da177e4 | 316 | { |
f7cdee8a NA |
317 | struct net_bridge *br = container_of(work, struct net_bridge, |
318 | gc_work.work); | |
1da177e4 | 319 | unsigned long delay = hold_time(br); |
f7cdee8a NA |
320 | unsigned long work_delay = delay; |
321 | unsigned long now = jiffies; | |
1da177e4 LT |
322 | int i; |
323 | ||
1da177e4 LT |
324 | for (i = 0; i < BR_HASH_SIZE; i++) { |
325 | struct net_bridge_fdb_entry *f; | |
b67bfe0d | 326 | struct hlist_node *n; |
1da177e4 | 327 | |
f7cdee8a NA |
328 | if (!br->hash[i].first) |
329 | continue; | |
330 | ||
331 | spin_lock_bh(&br->hash_lock); | |
b67bfe0d | 332 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
071f7722 | 333 | unsigned long this_timer; |
f7cdee8a | 334 | |
3fcf9011 | 335 | if (f->is_static) |
071f7722 | 336 | continue; |
dcd45e06 SM |
337 | if (f->added_by_external_learn) |
338 | continue; | |
7cd8861a | 339 | this_timer = f->updated + delay; |
f7cdee8a NA |
340 | if (time_after(this_timer, now)) |
341 | work_delay = min(work_delay, this_timer - now); | |
342 | else | |
31e8a49c | 343 | fdb_delete(br, f); |
1da177e4 | 344 | } |
f7cdee8a NA |
345 | spin_unlock_bh(&br->hash_lock); |
346 | cond_resched(); | |
1da177e4 | 347 | } |
1da177e4 | 348 | |
f7cdee8a NA |
349 | /* Cleanup minimum 10 milliseconds apart */ |
350 | work_delay = max_t(unsigned long, work_delay, msecs_to_jiffies(10)); | |
351 | mod_delayed_work(system_long_wq, &br->gc_work, work_delay); | |
1da177e4 LT |
352 | } |
353 | ||
9cf63747 SH |
354 | /* Completely flush all dynamic entries in forwarding database.*/ |
355 | void br_fdb_flush(struct net_bridge *br) | |
356 | { | |
357 | int i; | |
358 | ||
359 | spin_lock_bh(&br->hash_lock); | |
360 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
361 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
362 | struct hlist_node *n; |
363 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 364 | if (!f->is_static) |
31e8a49c | 365 | fdb_delete(br, f); |
9cf63747 SH |
366 | } |
367 | } | |
368 | spin_unlock_bh(&br->hash_lock); | |
369 | } | |
1a620698 | 370 | |
25985edc | 371 | /* Flush all entries referring to a specific port. |
9cf63747 | 372 | * if do_all is set also flush static entries |
1ea2d020 | 373 | * if vid is set delete all entries that match the vlan_id |
9cf63747 | 374 | */ |
1a620698 SH |
375 | void br_fdb_delete_by_port(struct net_bridge *br, |
376 | const struct net_bridge_port *p, | |
1ea2d020 | 377 | u16 vid, |
1a620698 | 378 | int do_all) |
1da177e4 LT |
379 | { |
380 | int i; | |
381 | ||
382 | spin_lock_bh(&br->hash_lock); | |
383 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
384 | struct hlist_node *h, *g; | |
9d6f229f | 385 | |
1da177e4 LT |
386 | hlist_for_each_safe(h, g, &br->hash[i]) { |
387 | struct net_bridge_fdb_entry *f | |
388 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 389 | if (f->dst != p) |
1da177e4 LT |
390 | continue; |
391 | ||
1ea2d020 NA |
392 | if (!do_all) |
393 | if (f->is_static || (vid && f->vlan_id != vid)) | |
394 | continue; | |
1da177e4 | 395 | |
a778e6d1 TM |
396 | if (f->is_local) |
397 | fdb_delete_local(br, p, f); | |
398 | else | |
399 | fdb_delete(br, f); | |
1da177e4 LT |
400 | } |
401 | } | |
402 | spin_unlock_bh(&br->hash_lock); | |
403 | } | |
404 | ||
e6373c4c | 405 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
406 | /* Interface used by ATM LANE hook to test |
407 | * if an addr is on some other bridge port */ | |
408 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
409 | { |
410 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 411 | struct net_bridge_port *port; |
da678292 MM |
412 | int ret; |
413 | ||
1da177e4 | 414 | rcu_read_lock(); |
b5ed54e9 | 415 | port = br_port_get_rcu(dev); |
416 | if (!port) | |
417 | ret = 0; | |
418 | else { | |
bfd0aeac | 419 | fdb = br_fdb_find_rcu(port->br, addr, 0); |
43598813 | 420 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 421 | fdb->dst->state == BR_STATE_FORWARDING; |
422 | } | |
1da177e4 | 423 | rcu_read_unlock(); |
1da177e4 | 424 | |
da678292 | 425 | return ret; |
1da177e4 | 426 | } |
da678292 | 427 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
428 | |
429 | /* | |
9d6f229f | 430 | * Fill buffer with forwarding table records in |
1da177e4 LT |
431 | * the API format. |
432 | */ | |
433 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
434 | unsigned long maxnum, unsigned long skip) | |
435 | { | |
436 | struct __fdb_entry *fe = buf; | |
437 | int i, num = 0; | |
1da177e4 LT |
438 | struct net_bridge_fdb_entry *f; |
439 | ||
440 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
441 | ||
442 | rcu_read_lock(); | |
443 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 444 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
445 | if (num >= maxnum) |
446 | goto out; | |
447 | ||
9d6f229f | 448 | if (has_expired(br, f)) |
1da177e4 LT |
449 | continue; |
450 | ||
43598813 | 451 | /* ignore pseudo entry for local MAC address */ |
452 | if (!f->dst) | |
453 | continue; | |
454 | ||
1da177e4 LT |
455 | if (skip) { |
456 | --skip; | |
457 | continue; | |
458 | } | |
459 | ||
460 | /* convert from internal format to API */ | |
461 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
462 | |
463 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 464 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
465 | fe->port_hi = f->dst->port_no >> 8; |
466 | ||
1da177e4 LT |
467 | fe->is_local = f->is_local; |
468 | if (!f->is_static) | |
a399a805 | 469 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
470 | ++fe; |
471 | ++num; | |
472 | } | |
473 | } | |
474 | ||
475 | out: | |
476 | rcu_read_unlock(); | |
477 | ||
478 | return num; | |
479 | } | |
480 | ||
1da177e4 LT |
481 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, |
482 | struct net_bridge_port *source, | |
2ba071ec | 483 | const unsigned char *addr, |
b7af1472 RP |
484 | __u16 vid, |
485 | unsigned char is_local, | |
486 | unsigned char is_static) | |
1da177e4 LT |
487 | { |
488 | struct net_bridge_fdb_entry *fdb; | |
489 | ||
490 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
491 | if (fdb) { | |
492 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 493 | fdb->dst = source; |
2ba071ec | 494 | fdb->vlan_id = vid; |
b7af1472 RP |
495 | fdb->is_local = is_local; |
496 | fdb->is_static = is_static; | |
a5642ab4 | 497 | fdb->added_by_user = 0; |
cf6b8e1e | 498 | fdb->added_by_external_learn = 0; |
9fe8bcec | 499 | fdb->offloaded = 0; |
7cd8861a | 500 | fdb->updated = fdb->used = jiffies; |
1158f762 | 501 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
502 | } |
503 | return fdb; | |
504 | } | |
505 | ||
506 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 507 | const unsigned char *addr, u16 vid) |
1da177e4 | 508 | { |
bc9a25d2 | 509 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
510 | struct net_bridge_fdb_entry *fdb; |
511 | ||
512 | if (!is_valid_ether_addr(addr)) | |
513 | return -EINVAL; | |
514 | ||
bfd0aeac | 515 | fdb = br_fdb_find(br, addr, vid); |
1da177e4 | 516 | if (fdb) { |
9d6f229f | 517 | /* it is okay to have multiple ports with same |
1da177e4 LT |
518 | * address, just use the first one. |
519 | */ | |
9d6f229f | 520 | if (fdb->is_local) |
1da177e4 | 521 | return 0; |
de1dfeef RP |
522 | br_warn(br, "adding interface %s with same address as a received packet (addr:%pM, vlan:%u)\n", |
523 | source ? source->dev->name : br->dev->name, addr, vid); | |
31e8a49c | 524 | fdb_delete(br, fdb); |
9d6f229f | 525 | } |
1da177e4 | 526 | |
b7af1472 | 527 | fdb = fdb_create(head, source, addr, vid, 1, 1); |
03e9b64b | 528 | if (!fdb) |
1da177e4 LT |
529 | return -ENOMEM; |
530 | ||
020ec6ba | 531 | fdb_add_hw_addr(br, addr); |
31e8a49c | 532 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
533 | return 0; |
534 | } | |
535 | ||
03e9b64b | 536 | /* Add entry for local address of interface */ |
1da177e4 | 537 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 538 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
539 | { |
540 | int ret; | |
541 | ||
542 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 543 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
544 | spin_unlock_bh(&br->hash_lock); |
545 | return ret; | |
546 | } | |
547 | ||
548 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 549 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 550 | { |
2ba071ec | 551 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 552 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 553 | bool fdb_modified = false; |
1da177e4 LT |
554 | |
555 | /* some users want to always flood. */ | |
556 | if (hold_time(br) == 0) | |
557 | return; | |
558 | ||
df1c0b84 SH |
559 | /* ignore packets unless we are using this port */ |
560 | if (!(source->state == BR_STATE_LEARNING || | |
561 | source->state == BR_STATE_FORWARDING)) | |
562 | return; | |
563 | ||
2ba071ec | 564 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
565 | if (likely(fdb)) { |
566 | /* attempt to update an entry for a local interface */ | |
567 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 568 | if (net_ratelimit()) |
de1dfeef RP |
569 | br_warn(br, "received packet on %s with own address as source address (addr:%pM, vlan:%u)\n", |
570 | source->dev->name, addr, vid); | |
1da177e4 | 571 | } else { |
ca6d4480 | 572 | unsigned long now = jiffies; |
573 | ||
1da177e4 | 574 | /* fastpath: update of existing entry */ |
c65c7a30 JM |
575 | if (unlikely(source != fdb->dst)) { |
576 | fdb->dst = source; | |
577 | fdb_modified = true; | |
58073b32 AS |
578 | /* Take over HW learned entry */ |
579 | if (unlikely(fdb->added_by_external_learn)) | |
580 | fdb->added_by_external_learn = 0; | |
c65c7a30 | 581 | } |
ca6d4480 | 582 | if (now != fdb->updated) |
583 | fdb->updated = now; | |
a5642ab4 TM |
584 | if (unlikely(added_by_user)) |
585 | fdb->added_by_user = 1; | |
e3cfddd5 RP |
586 | if (unlikely(fdb_modified)) { |
587 | trace_br_fdb_update(br, source, addr, vid, added_by_user); | |
c65c7a30 | 588 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
e3cfddd5 | 589 | } |
1da177e4 LT |
590 | } |
591 | } else { | |
f8ae737d | 592 | spin_lock(&br->hash_lock); |
bfd0aeac | 593 | if (likely(!fdb_find_rcu(head, addr, vid))) { |
b7af1472 | 594 | fdb = fdb_create(head, source, addr, vid, 0, 0); |
a5642ab4 TM |
595 | if (fdb) { |
596 | if (unlikely(added_by_user)) | |
597 | fdb->added_by_user = 1; | |
e3cfddd5 | 598 | trace_br_fdb_update(br, source, addr, vid, added_by_user); |
31e8a49c | 599 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 600 | } |
f58ee4e1 | 601 | } |
1da177e4 LT |
602 | /* else we lose race and someone else inserts |
603 | * it first, don't bother updating | |
604 | */ | |
f8ae737d | 605 | spin_unlock(&br->hash_lock); |
1da177e4 | 606 | } |
1da177e4 | 607 | } |
b078f0df | 608 | |
3741873b RP |
609 | static int fdb_to_nud(const struct net_bridge *br, |
610 | const struct net_bridge_fdb_entry *fdb) | |
b078f0df | 611 | { |
612 | if (fdb->is_local) | |
613 | return NUD_PERMANENT; | |
614 | else if (fdb->is_static) | |
615 | return NUD_NOARP; | |
3741873b | 616 | else if (has_expired(br, fdb)) |
b078f0df | 617 | return NUD_STALE; |
618 | else | |
619 | return NUD_REACHABLE; | |
620 | } | |
621 | ||
31e8a49c | 622 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 623 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 624 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 625 | { |
626 | unsigned long now = jiffies; | |
627 | struct nda_cacheinfo ci; | |
628 | struct nlmsghdr *nlh; | |
629 | struct ndmsg *ndm; | |
630 | ||
15e47304 | 631 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 632 | if (nlh == NULL) |
633 | return -EMSGSIZE; | |
634 | ||
b078f0df | 635 | ndm = nlmsg_data(nlh); |
636 | ndm->ndm_family = AF_BRIDGE; | |
637 | ndm->ndm_pad1 = 0; | |
638 | ndm->ndm_pad2 = 0; | |
9fe8bcec | 639 | ndm->ndm_flags = 0; |
b078f0df | 640 | ndm->ndm_type = 0; |
43598813 | 641 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
3741873b | 642 | ndm->ndm_state = fdb_to_nud(br, fdb); |
b078f0df | 643 | |
9fe8bcec AS |
644 | if (fdb->offloaded) |
645 | ndm->ndm_flags |= NTF_OFFLOADED; | |
646 | if (fdb->added_by_external_learn) | |
647 | ndm->ndm_flags |= NTF_EXT_LEARNED; | |
648 | ||
2eb812e6 DM |
649 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
650 | goto nla_put_failure; | |
41c389d7 RP |
651 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
652 | goto nla_put_failure; | |
b078f0df | 653 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
654 | ci.ndm_confirmed = 0; | |
655 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
656 | ci.ndm_refcnt = 0; | |
2eb812e6 DM |
657 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
658 | goto nla_put_failure; | |
1690be63 | 659 | |
47fab41a | 660 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
1690be63 VY |
661 | goto nla_put_failure; |
662 | ||
053c095a JB |
663 | nlmsg_end(skb, nlh); |
664 | return 0; | |
b078f0df | 665 | |
666 | nla_put_failure: | |
667 | nlmsg_cancel(skb, nlh); | |
668 | return -EMSGSIZE; | |
669 | } | |
670 | ||
671 | static inline size_t fdb_nlmsg_size(void) | |
672 | { | |
673 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
674 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
41c389d7 | 675 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
1690be63 | 676 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df | 677 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
678 | } | |
679 | ||
31e8a49c | 680 | static void fdb_notify(struct net_bridge *br, |
681 | const struct net_bridge_fdb_entry *fdb, int type) | |
b078f0df | 682 | { |
31e8a49c | 683 | struct net *net = dev_net(br->dev); |
b078f0df | 684 | struct sk_buff *skb; |
685 | int err = -ENOBUFS; | |
686 | ||
6b26b51b AS |
687 | br_switchdev_fdb_notify(fdb, type); |
688 | ||
b078f0df | 689 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); |
690 | if (skb == NULL) | |
691 | goto errout; | |
692 | ||
31e8a49c | 693 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 694 | if (err < 0) { |
695 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
696 | WARN_ON(err == -EMSGSIZE); | |
697 | kfree_skb(skb); | |
698 | goto errout; | |
699 | } | |
700 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
701 | return; | |
702 | errout: | |
87e823b3 | 703 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 704 | } |
705 | ||
706 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
707 | int br_fdb_dump(struct sk_buff *skb, |
708 | struct netlink_callback *cb, | |
709 | struct net_device *dev, | |
5d5eacb3 | 710 | struct net_device *filter_dev, |
d297653d | 711 | int *idx) |
b078f0df | 712 | { |
77162022 | 713 | struct net_bridge *br = netdev_priv(dev); |
d297653d | 714 | int err = 0; |
77162022 | 715 | int i; |
b078f0df | 716 | |
77162022 JF |
717 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
718 | goto out; | |
b078f0df | 719 | |
d297653d RP |
720 | if (!filter_dev) { |
721 | err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
722 | if (err < 0) | |
723 | goto out; | |
724 | } | |
6cb69742 | 725 | |
77162022 | 726 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 727 | struct net_bridge_fdb_entry *f; |
b078f0df | 728 | |
b67bfe0d | 729 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
472681d5 | 730 | |
d297653d | 731 | if (*idx < cb->args[2]) |
77162022 JF |
732 | goto skip; |
733 | ||
5e6d2435 JHS |
734 | if (filter_dev && |
735 | (!f->dst || f->dst->dev != filter_dev)) { | |
736 | if (filter_dev != dev) | |
737 | goto skip; | |
6cb69742 | 738 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
739 | * It means the MAC belongs to the bridge |
740 | * Therefore need a little more filtering | |
741 | * we only want to dump the !f->dst case | |
742 | */ | |
743 | if (f->dst) | |
744 | goto skip; | |
745 | } | |
6cb69742 HS |
746 | if (!filter_dev && f->dst) |
747 | goto skip; | |
5d5eacb3 | 748 | |
472681d5 MM |
749 | err = fdb_fill_info(skb, br, f, |
750 | NETLINK_CB(cb->skb).portid, | |
751 | cb->nlh->nlmsg_seq, | |
752 | RTM_NEWNEIGH, | |
753 | NLM_F_MULTI); | |
d297653d RP |
754 | if (err < 0) |
755 | goto out; | |
b078f0df | 756 | skip: |
d297653d | 757 | *idx += 1; |
b078f0df | 758 | } |
759 | } | |
b078f0df | 760 | |
77162022 | 761 | out: |
d297653d | 762 | return err; |
b078f0df | 763 | } |
36fd2b63 | 764 | |
292d1398 | 765 | /* Update (create or replace) forwarding database entry */ |
7bb90c37 TM |
766 | static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source, |
767 | const __u8 *addr, __u16 state, __u16 flags, __u16 vid) | |
36fd2b63 | 768 | { |
2ba071ec | 769 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 770 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 771 | bool modified = false; |
36fd2b63 | 772 | |
eb8d7baa | 773 | /* If the port cannot learn allow only local and static entries */ |
7bb90c37 | 774 | if (source && !(state & NUD_PERMANENT) && !(state & NUD_NOARP) && |
eb8d7baa WK |
775 | !(source->state == BR_STATE_LEARNING || |
776 | source->state == BR_STATE_FORWARDING)) | |
777 | return -EPERM; | |
778 | ||
7bb90c37 TM |
779 | if (!source && !(state & NUD_PERMANENT)) { |
780 | pr_info("bridge: RTM_NEWNEIGH %s without NUD_PERMANENT\n", | |
781 | br->dev->name); | |
782 | return -EINVAL; | |
783 | } | |
784 | ||
bfd0aeac | 785 | fdb = br_fdb_find(br, addr, vid); |
64af1bac | 786 | if (fdb == NULL) { |
787 | if (!(flags & NLM_F_CREATE)) | |
788 | return -ENOENT; | |
36fd2b63 | 789 | |
b7af1472 | 790 | fdb = fdb_create(head, source, addr, vid, 0, 0); |
64af1bac | 791 | if (!fdb) |
792 | return -ENOMEM; | |
b0a397fb | 793 | |
794 | modified = true; | |
64af1bac | 795 | } else { |
796 | if (flags & NLM_F_EXCL) | |
797 | return -EEXIST; | |
b0a397fb | 798 | |
799 | if (fdb->dst != source) { | |
800 | fdb->dst = source; | |
801 | modified = true; | |
802 | } | |
292d1398 | 803 | } |
804 | ||
3741873b | 805 | if (fdb_to_nud(br, fdb) != state) { |
145beee8 VY |
806 | if (state & NUD_PERMANENT) { |
807 | fdb->is_local = 1; | |
808 | if (!fdb->is_static) { | |
809 | fdb->is_static = 1; | |
020ec6ba | 810 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
811 | } |
812 | } else if (state & NUD_NOARP) { | |
813 | fdb->is_local = 0; | |
814 | if (!fdb->is_static) { | |
815 | fdb->is_static = 1; | |
020ec6ba | 816 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
817 | } |
818 | } else { | |
292d1398 | 819 | fdb->is_local = 0; |
145beee8 VY |
820 | if (fdb->is_static) { |
821 | fdb->is_static = 0; | |
020ec6ba | 822 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
823 | } |
824 | } | |
64af1bac | 825 | |
b0a397fb | 826 | modified = true; |
827 | } | |
a5642ab4 | 828 | fdb->added_by_user = 1; |
b0a397fb | 829 | |
830 | fdb->used = jiffies; | |
831 | if (modified) { | |
832 | fdb->updated = jiffies; | |
31e8a49c | 833 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 834 | } |
36fd2b63 | 835 | |
36fd2b63 | 836 | return 0; |
837 | } | |
838 | ||
7bb90c37 TM |
839 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br, |
840 | struct net_bridge_port *p, const unsigned char *addr, | |
841 | u16 nlh_flags, u16 vid) | |
1690be63 VY |
842 | { |
843 | int err = 0; | |
844 | ||
845 | if (ndm->ndm_flags & NTF_USE) { | |
7bb90c37 TM |
846 | if (!p) { |
847 | pr_info("bridge: RTM_NEWNEIGH %s with NTF_USE is not supported\n", | |
848 | br->dev->name); | |
849 | return -EINVAL; | |
850 | } | |
c4c832f8 | 851 | local_bh_disable(); |
1690be63 | 852 | rcu_read_lock(); |
7bb90c37 | 853 | br_fdb_update(br, p, addr, vid, true); |
1690be63 | 854 | rcu_read_unlock(); |
c4c832f8 | 855 | local_bh_enable(); |
eb100e0e NA |
856 | } else if (ndm->ndm_flags & NTF_EXT_LEARNED) { |
857 | err = br_fdb_external_learn_add(br, p, addr, vid); | |
1690be63 | 858 | } else { |
7bb90c37 TM |
859 | spin_lock_bh(&br->hash_lock); |
860 | err = fdb_add_entry(br, p, addr, ndm->ndm_state, | |
1690be63 | 861 | nlh_flags, vid); |
7bb90c37 | 862 | spin_unlock_bh(&br->hash_lock); |
1690be63 VY |
863 | } |
864 | ||
865 | return err; | |
866 | } | |
867 | ||
36fd2b63 | 868 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 869 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
870 | struct net_device *dev, | |
f6f6424b | 871 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
36fd2b63 | 872 | { |
2594e906 | 873 | struct net_bridge_vlan_group *vg; |
3741873b | 874 | struct net_bridge_port *p = NULL; |
2594e906 | 875 | struct net_bridge_vlan *v; |
3741873b | 876 | struct net_bridge *br = NULL; |
77162022 | 877 | int err = 0; |
36fd2b63 | 878 | |
b74fd306 RP |
879 | trace_br_fdb_add(ndm, dev, addr, vid, nlh_flags); |
880 | ||
292d1398 | 881 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
882 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
883 | return -EINVAL; | |
884 | } | |
885 | ||
537f7f84 SH |
886 | if (is_zero_ether_addr(addr)) { |
887 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
888 | return -EINVAL; | |
889 | } | |
890 | ||
3741873b RP |
891 | if (dev->priv_flags & IFF_EBRIDGE) { |
892 | br = netdev_priv(dev); | |
893 | vg = br_vlan_group(br); | |
894 | } else { | |
895 | p = br_port_get_rtnl(dev); | |
896 | if (!p) { | |
897 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
898 | dev->name); | |
899 | return -EINVAL; | |
900 | } | |
7bb90c37 | 901 | br = p->br; |
3741873b | 902 | vg = nbp_vlan_group(p); |
36fd2b63 | 903 | } |
904 | ||
f6f6424b | 905 | if (vid) { |
2594e906 | 906 | v = br_vlan_find(vg, vid); |
3741873b RP |
907 | if (!v || !br_vlan_should_use(v)) { |
908 | pr_info("bridge: RTM_NEWNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); | |
1690be63 VY |
909 | return -EINVAL; |
910 | } | |
911 | ||
912 | /* VID was specified, so use it. */ | |
7bb90c37 | 913 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, vid); |
292d1398 | 914 | } else { |
7bb90c37 | 915 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, 0); |
2594e906 | 916 | if (err || !vg || !vg->num_vlans) |
1690be63 | 917 | goto out; |
1690be63 VY |
918 | |
919 | /* We have vlans configured on this port and user didn't | |
920 | * specify a VLAN. To be nice, add/update entry for every | |
921 | * vlan on this port. | |
922 | */ | |
2594e906 | 923 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
3741873b RP |
924 | if (!br_vlan_should_use(v)) |
925 | continue; | |
7bb90c37 | 926 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, v->vid); |
1690be63 VY |
927 | if (err) |
928 | goto out; | |
1690be63 | 929 | } |
292d1398 | 930 | } |
36fd2b63 | 931 | |
1690be63 | 932 | out: |
36fd2b63 | 933 | return err; |
934 | } | |
935 | ||
5019ab50 NA |
936 | static int fdb_delete_by_addr_and_port(struct net_bridge *br, |
937 | const struct net_bridge_port *p, | |
8c86f967 | 938 | const u8 *addr, u16 vlan) |
36fd2b63 | 939 | { |
36fd2b63 | 940 | struct net_bridge_fdb_entry *fdb; |
941 | ||
bfd0aeac | 942 | fdb = br_fdb_find(br, addr, vlan); |
8c86f967 | 943 | if (!fdb || fdb->dst != p) |
36fd2b63 | 944 | return -ENOENT; |
945 | ||
1690be63 | 946 | fdb_delete(br, fdb); |
5019ab50 | 947 | |
36fd2b63 | 948 | return 0; |
949 | } | |
950 | ||
5019ab50 NA |
951 | static int __br_fdb_delete(struct net_bridge *br, |
952 | const struct net_bridge_port *p, | |
1690be63 VY |
953 | const unsigned char *addr, u16 vid) |
954 | { | |
955 | int err; | |
956 | ||
5019ab50 NA |
957 | spin_lock_bh(&br->hash_lock); |
958 | err = fdb_delete_by_addr_and_port(br, p, addr, vid); | |
959 | spin_unlock_bh(&br->hash_lock); | |
1690be63 VY |
960 | |
961 | return err; | |
962 | } | |
963 | ||
36fd2b63 | 964 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
965 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
966 | struct net_device *dev, | |
f6f6424b | 967 | const unsigned char *addr, u16 vid) |
36fd2b63 | 968 | { |
2594e906 | 969 | struct net_bridge_vlan_group *vg; |
3741873b | 970 | struct net_bridge_port *p = NULL; |
2594e906 | 971 | struct net_bridge_vlan *v; |
5019ab50 | 972 | struct net_bridge *br; |
36fd2b63 | 973 | int err; |
1690be63 | 974 | |
3741873b RP |
975 | if (dev->priv_flags & IFF_EBRIDGE) { |
976 | br = netdev_priv(dev); | |
977 | vg = br_vlan_group(br); | |
978 | } else { | |
979 | p = br_port_get_rtnl(dev); | |
980 | if (!p) { | |
981 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
982 | dev->name); | |
983 | return -EINVAL; | |
984 | } | |
985 | vg = nbp_vlan_group(p); | |
5019ab50 | 986 | br = p->br; |
36fd2b63 | 987 | } |
988 | ||
f6f6424b | 989 | if (vid) { |
2594e906 NA |
990 | v = br_vlan_find(vg, vid); |
991 | if (!v) { | |
3741873b | 992 | pr_info("bridge: RTM_DELNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); |
1690be63 VY |
993 | return -EINVAL; |
994 | } | |
36fd2b63 | 995 | |
5019ab50 | 996 | err = __br_fdb_delete(br, p, addr, vid); |
1690be63 | 997 | } else { |
25d3b493 | 998 | err = -ENOENT; |
5019ab50 | 999 | err &= __br_fdb_delete(br, p, addr, 0); |
2594e906 | 1000 | if (!vg || !vg->num_vlans) |
5019ab50 | 1001 | return err; |
1690be63 | 1002 | |
3741873b RP |
1003 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
1004 | if (!br_vlan_should_use(v)) | |
1005 | continue; | |
5019ab50 | 1006 | err &= __br_fdb_delete(br, p, addr, v->vid); |
3741873b | 1007 | } |
1690be63 | 1008 | } |
5019ab50 | 1009 | |
36fd2b63 | 1010 | return err; |
1011 | } | |
8db24af7 VY |
1012 | |
1013 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1014 | { | |
1015 | struct net_bridge_fdb_entry *fdb, *tmp; | |
1016 | int i; | |
1017 | int err; | |
1018 | ||
1019 | ASSERT_RTNL(); | |
1020 | ||
1021 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1022 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
1023 | /* We only care for static entries */ | |
1024 | if (!fdb->is_static) | |
1025 | continue; | |
1026 | ||
1027 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
1028 | if (err) | |
1029 | goto rollback; | |
1030 | } | |
1031 | } | |
1032 | return 0; | |
1033 | ||
1034 | rollback: | |
1035 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1036 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
1037 | /* If we reached the fdb that failed, we can stop */ | |
1038 | if (tmp == fdb) | |
1039 | break; | |
1040 | ||
1041 | /* We only care for static entries */ | |
1042 | if (!tmp->is_static) | |
1043 | continue; | |
1044 | ||
1045 | dev_uc_del(p->dev, tmp->addr.addr); | |
1046 | } | |
1047 | } | |
1048 | return err; | |
1049 | } | |
1050 | ||
1051 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1052 | { | |
1053 | struct net_bridge_fdb_entry *fdb; | |
1054 | int i; | |
1055 | ||
1056 | ASSERT_RTNL(); | |
1057 | ||
1058 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1059 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
1060 | /* We only care for static entries */ | |
1061 | if (!fdb->is_static) | |
1062 | continue; | |
1063 | ||
1064 | dev_uc_del(p->dev, fdb->addr.addr); | |
1065 | } | |
1066 | } | |
1067 | } | |
cf6b8e1e | 1068 | |
3aeb6617 | 1069 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1070 | const unsigned char *addr, u16 vid) |
1071 | { | |
cf6b8e1e | 1072 | struct net_bridge_fdb_entry *fdb; |
7597b266 NA |
1073 | struct hlist_head *head; |
1074 | bool modified = false; | |
cf6b8e1e SF |
1075 | int err = 0; |
1076 | ||
b74fd306 RP |
1077 | trace_br_fdb_external_learn_add(br, p, addr, vid); |
1078 | ||
cf6b8e1e SF |
1079 | spin_lock_bh(&br->hash_lock); |
1080 | ||
1081 | head = &br->hash[br_mac_hash(addr, vid)]; | |
bfd0aeac | 1082 | fdb = br_fdb_find(br, addr, vid); |
cf6b8e1e | 1083 | if (!fdb) { |
b7af1472 | 1084 | fdb = fdb_create(head, p, addr, vid, 0, 0); |
cf6b8e1e SF |
1085 | if (!fdb) { |
1086 | err = -ENOMEM; | |
1087 | goto err_unlock; | |
1088 | } | |
1089 | fdb->added_by_external_learn = 1; | |
1090 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
7597b266 | 1091 | } else { |
cf6b8e1e | 1092 | fdb->updated = jiffies; |
7597b266 NA |
1093 | |
1094 | if (fdb->dst != p) { | |
1095 | fdb->dst = p; | |
1096 | modified = true; | |
1097 | } | |
1098 | ||
1099 | if (fdb->added_by_external_learn) { | |
1100 | /* Refresh entry */ | |
1101 | fdb->used = jiffies; | |
1102 | } else if (!fdb->added_by_user) { | |
1103 | /* Take over SW learned entry */ | |
1104 | fdb->added_by_external_learn = 1; | |
1105 | modified = true; | |
1106 | } | |
1107 | ||
1108 | if (modified) | |
1109 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
cf6b8e1e SF |
1110 | } |
1111 | ||
1112 | err_unlock: | |
1113 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1114 | |
1115 | return err; | |
1116 | } | |
cf6b8e1e | 1117 | |
3aeb6617 | 1118 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1119 | const unsigned char *addr, u16 vid) |
1120 | { | |
cf6b8e1e SF |
1121 | struct net_bridge_fdb_entry *fdb; |
1122 | int err = 0; | |
1123 | ||
cf6b8e1e SF |
1124 | spin_lock_bh(&br->hash_lock); |
1125 | ||
bfd0aeac | 1126 | fdb = br_fdb_find(br, addr, vid); |
cf6b8e1e SF |
1127 | if (fdb && fdb->added_by_external_learn) |
1128 | fdb_delete(br, fdb); | |
1129 | else | |
1130 | err = -ENOENT; | |
1131 | ||
1132 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1133 | |
1134 | return err; | |
1135 | } | |
9fe8bcec AS |
1136 | |
1137 | void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, | |
1138 | const unsigned char *addr, u16 vid) | |
1139 | { | |
1140 | struct net_bridge_fdb_entry *fdb; | |
1141 | ||
1142 | spin_lock_bh(&br->hash_lock); | |
1143 | ||
1144 | fdb = br_fdb_find(br, addr, vid); | |
1145 | if (fdb) | |
1146 | fdb->offloaded = 1; | |
1147 | ||
1148 | spin_unlock_bh(&br->hash_lock); | |
1149 | } |