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 | { | |
52ba57cf | 136 | struct switchdev_obj_port_fdb fdb = { |
56607386 JP |
137 | .obj = { |
138 | .id = SWITCHDEV_OBJ_ID_PORT_FDB, | |
139 | .flags = SWITCHDEV_F_DEFER, | |
140 | }, | |
ab069002 | 141 | .vid = f->vlan_id, |
b4ad7baa SF |
142 | }; |
143 | ||
850d0cbc | 144 | ether_addr_copy(fdb.addr, f->addr.addr); |
9e8f4a54 | 145 | switchdev_port_obj_del(f->dst->dev, &fdb.obj); |
b4ad7baa SF |
146 | } |
147 | ||
31e8a49c | 148 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
1da177e4 | 149 | { |
145beee8 | 150 | if (f->is_static) |
020ec6ba | 151 | fdb_del_hw_addr(br, f->addr.addr); |
145beee8 | 152 | |
b4ad7baa SF |
153 | if (f->added_by_external_learn) |
154 | fdb_del_external_learn(f); | |
155 | ||
1da177e4 | 156 | hlist_del_rcu(&f->hlist); |
31e8a49c | 157 | fdb_notify(br, f, RTM_DELNEIGH); |
da678292 | 158 | call_rcu(&f->rcu, fdb_rcu_free); |
1da177e4 LT |
159 | } |
160 | ||
960b589f TM |
161 | /* Delete a local entry if no other port had the same address. */ |
162 | static void fdb_delete_local(struct net_bridge *br, | |
163 | const struct net_bridge_port *p, | |
164 | struct net_bridge_fdb_entry *f) | |
165 | { | |
166 | const unsigned char *addr = f->addr.addr; | |
2594e906 NA |
167 | struct net_bridge_vlan_group *vg; |
168 | const struct net_bridge_vlan *v; | |
960b589f | 169 | struct net_bridge_port *op; |
2594e906 | 170 | u16 vid = f->vlan_id; |
960b589f TM |
171 | |
172 | /* Maybe another port has same hw addr? */ | |
173 | list_for_each_entry(op, &br->port_list, list) { | |
2594e906 | 174 | vg = nbp_vlan_group(op); |
960b589f | 175 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && |
2594e906 | 176 | (!vid || br_vlan_find(vg, vid))) { |
960b589f | 177 | f->dst = op; |
a778e6d1 | 178 | f->added_by_user = 0; |
960b589f TM |
179 | return; |
180 | } | |
181 | } | |
182 | ||
2594e906 NA |
183 | vg = br_vlan_group(br); |
184 | v = br_vlan_find(vg, vid); | |
960b589f TM |
185 | /* Maybe bridge device has same hw addr? */ |
186 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
2594e906 | 187 | (!vid || (v && br_vlan_should_use(v)))) { |
960b589f | 188 | f->dst = NULL; |
a778e6d1 | 189 | f->added_by_user = 0; |
960b589f TM |
190 | return; |
191 | } | |
192 | ||
193 | fdb_delete(br, f); | |
194 | } | |
195 | ||
424bb9c9 TM |
196 | void br_fdb_find_delete_local(struct net_bridge *br, |
197 | const struct net_bridge_port *p, | |
198 | const unsigned char *addr, u16 vid) | |
199 | { | |
200 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
201 | struct net_bridge_fdb_entry *f; | |
202 | ||
203 | spin_lock_bh(&br->hash_lock); | |
204 | f = fdb_find(head, addr, vid); | |
205 | if (f && f->is_local && !f->added_by_user && f->dst == p) | |
206 | fdb_delete_local(br, p, f); | |
207 | spin_unlock_bh(&br->hash_lock); | |
208 | } | |
209 | ||
1da177e4 LT |
210 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
211 | { | |
2594e906 | 212 | struct net_bridge_vlan_group *vg; |
1da177e4 | 213 | struct net_bridge *br = p->br; |
2594e906 | 214 | struct net_bridge_vlan *v; |
1da177e4 | 215 | int i; |
9d6f229f | 216 | |
1da177e4 LT |
217 | spin_lock_bh(&br->hash_lock); |
218 | ||
2594e906 | 219 | vg = nbp_vlan_group(p); |
1da177e4 LT |
220 | /* Search all chains since old address/hash is unknown */ |
221 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
222 | struct hlist_node *h; | |
223 | hlist_for_each(h, &br->hash[i]) { | |
224 | struct net_bridge_fdb_entry *f; | |
225 | ||
226 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
a5642ab4 | 227 | if (f->dst == p && f->is_local && !f->added_by_user) { |
1da177e4 | 228 | /* delete old one */ |
960b589f TM |
229 | fdb_delete_local(br, p, f); |
230 | ||
bc9a25d2 VY |
231 | /* if this port has no vlan information |
232 | * configured, we can safely be done at | |
233 | * this point. | |
234 | */ | |
2594e906 | 235 | if (!vg || !vg->num_vlans) |
2836882f | 236 | goto insert; |
1da177e4 LT |
237 | } |
238 | } | |
239 | } | |
1da177e4 | 240 | |
2836882f TM |
241 | insert: |
242 | /* insert new address, may fail if invalid address or dup. */ | |
243 | fdb_insert(br, p, newaddr, 0); | |
244 | ||
2594e906 | 245 | if (!vg || !vg->num_vlans) |
2836882f TM |
246 | goto done; |
247 | ||
248 | /* Now add entries for every VLAN configured on the port. | |
249 | * This function runs under RTNL so the bitmap will not change | |
250 | * from under us. | |
251 | */ | |
2594e906 NA |
252 | list_for_each_entry(v, &vg->vlan_list, vlist) |
253 | fdb_insert(br, p, newaddr, v->vid); | |
2836882f | 254 | |
bc9a25d2 | 255 | done: |
1da177e4 LT |
256 | spin_unlock_bh(&br->hash_lock); |
257 | } | |
258 | ||
43598813 | 259 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
260 | { | |
2594e906 | 261 | struct net_bridge_vlan_group *vg; |
43598813 | 262 | struct net_bridge_fdb_entry *f; |
2594e906 | 263 | struct net_bridge_vlan *v; |
43598813 | 264 | |
ac4c8868 TM |
265 | spin_lock_bh(&br->hash_lock); |
266 | ||
43598813 | 267 | /* If old entry was unassociated with any port, then delete it. */ |
2ba071ec | 268 | f = __br_fdb_get(br, br->dev->dev_addr, 0); |
43598813 | 269 | if (f && f->is_local && !f->dst) |
960b589f | 270 | fdb_delete_local(br, NULL, f); |
43598813 | 271 | |
bc9a25d2 | 272 | fdb_insert(br, NULL, newaddr, 0); |
2594e906 NA |
273 | vg = br_vlan_group(br); |
274 | if (!vg || !vg->num_vlans) | |
275 | goto out; | |
bc9a25d2 VY |
276 | /* Now remove and add entries for every VLAN configured on the |
277 | * bridge. This function runs under RTNL so the bitmap will not | |
278 | * change from under us. | |
279 | */ | |
2594e906 NA |
280 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
281 | f = __br_fdb_get(br, br->dev->dev_addr, v->vid); | |
bc9a25d2 | 282 | if (f && f->is_local && !f->dst) |
960b589f | 283 | fdb_delete_local(br, NULL, f); |
2594e906 | 284 | fdb_insert(br, NULL, newaddr, v->vid); |
bc9a25d2 | 285 | } |
ac4c8868 TM |
286 | out: |
287 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 288 | } |
289 | ||
1da177e4 LT |
290 | void br_fdb_cleanup(unsigned long _data) |
291 | { | |
292 | struct net_bridge *br = (struct net_bridge *)_data; | |
293 | unsigned long delay = hold_time(br); | |
25442e06 | 294 | unsigned long next_timer = jiffies + br->ageing_time; |
1da177e4 LT |
295 | int i; |
296 | ||
27a42938 | 297 | spin_lock(&br->hash_lock); |
1da177e4 LT |
298 | for (i = 0; i < BR_HASH_SIZE; i++) { |
299 | struct net_bridge_fdb_entry *f; | |
b67bfe0d | 300 | struct hlist_node *n; |
1da177e4 | 301 | |
b67bfe0d | 302 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
071f7722 | 303 | unsigned long this_timer; |
3fcf9011 | 304 | if (f->is_static) |
071f7722 | 305 | continue; |
dcd45e06 SM |
306 | if (f->added_by_external_learn) |
307 | continue; | |
7cd8861a | 308 | this_timer = f->updated + delay; |
071f7722 | 309 | if (time_before_eq(this_timer, jiffies)) |
31e8a49c | 310 | fdb_delete(br, f); |
2bec008c | 311 | else if (time_before(this_timer, next_timer)) |
071f7722 | 312 | next_timer = this_timer; |
1da177e4 LT |
313 | } |
314 | } | |
27a42938 | 315 | spin_unlock(&br->hash_lock); |
1da177e4 | 316 | |
25442e06 | 317 | mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
1da177e4 LT |
318 | } |
319 | ||
9cf63747 SH |
320 | /* Completely flush all dynamic entries in forwarding database.*/ |
321 | void br_fdb_flush(struct net_bridge *br) | |
322 | { | |
323 | int i; | |
324 | ||
325 | spin_lock_bh(&br->hash_lock); | |
326 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
327 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
328 | struct hlist_node *n; |
329 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 330 | if (!f->is_static) |
31e8a49c | 331 | fdb_delete(br, f); |
9cf63747 SH |
332 | } |
333 | } | |
334 | spin_unlock_bh(&br->hash_lock); | |
335 | } | |
1a620698 | 336 | |
25985edc | 337 | /* Flush all entries referring to a specific port. |
9cf63747 | 338 | * if do_all is set also flush static entries |
1ea2d020 | 339 | * if vid is set delete all entries that match the vlan_id |
9cf63747 | 340 | */ |
1a620698 SH |
341 | void br_fdb_delete_by_port(struct net_bridge *br, |
342 | const struct net_bridge_port *p, | |
1ea2d020 | 343 | u16 vid, |
1a620698 | 344 | int do_all) |
1da177e4 LT |
345 | { |
346 | int i; | |
347 | ||
348 | spin_lock_bh(&br->hash_lock); | |
349 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
350 | struct hlist_node *h, *g; | |
9d6f229f | 351 | |
1da177e4 LT |
352 | hlist_for_each_safe(h, g, &br->hash[i]) { |
353 | struct net_bridge_fdb_entry *f | |
354 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 355 | if (f->dst != p) |
1da177e4 LT |
356 | continue; |
357 | ||
1ea2d020 NA |
358 | if (!do_all) |
359 | if (f->is_static || (vid && f->vlan_id != vid)) | |
360 | continue; | |
1da177e4 | 361 | |
a778e6d1 TM |
362 | if (f->is_local) |
363 | fdb_delete_local(br, p, f); | |
364 | else | |
365 | fdb_delete(br, f); | |
1da177e4 LT |
366 | } |
367 | } | |
368 | spin_unlock_bh(&br->hash_lock); | |
369 | } | |
370 | ||
eeaf61d8 | 371 | /* No locking or refcounting, assumes caller has rcu_read_lock */ |
1da177e4 | 372 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
2ba071ec VY |
373 | const unsigned char *addr, |
374 | __u16 vid) | |
1da177e4 | 375 | { |
1da177e4 LT |
376 | struct net_bridge_fdb_entry *fdb; |
377 | ||
b67bfe0d | 378 | hlist_for_each_entry_rcu(fdb, |
2ba071ec VY |
379 | &br->hash[br_mac_hash(addr, vid)], hlist) { |
380 | if (ether_addr_equal(fdb->addr.addr, addr) && | |
381 | fdb->vlan_id == vid) { | |
1da177e4 LT |
382 | if (unlikely(has_expired(br, fdb))) |
383 | break; | |
384 | return fdb; | |
385 | } | |
386 | } | |
387 | ||
388 | return NULL; | |
389 | } | |
390 | ||
e6373c4c | 391 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
392 | /* Interface used by ATM LANE hook to test |
393 | * if an addr is on some other bridge port */ | |
394 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
395 | { |
396 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 397 | struct net_bridge_port *port; |
da678292 MM |
398 | int ret; |
399 | ||
1da177e4 | 400 | rcu_read_lock(); |
b5ed54e9 | 401 | port = br_port_get_rcu(dev); |
402 | if (!port) | |
403 | ret = 0; | |
404 | else { | |
2ba071ec | 405 | fdb = __br_fdb_get(port->br, addr, 0); |
43598813 | 406 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 407 | fdb->dst->state == BR_STATE_FORWARDING; |
408 | } | |
1da177e4 | 409 | rcu_read_unlock(); |
1da177e4 | 410 | |
da678292 | 411 | return ret; |
1da177e4 | 412 | } |
da678292 | 413 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
414 | |
415 | /* | |
9d6f229f | 416 | * Fill buffer with forwarding table records in |
1da177e4 LT |
417 | * the API format. |
418 | */ | |
419 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
420 | unsigned long maxnum, unsigned long skip) | |
421 | { | |
422 | struct __fdb_entry *fe = buf; | |
423 | int i, num = 0; | |
1da177e4 LT |
424 | struct net_bridge_fdb_entry *f; |
425 | ||
426 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
427 | ||
428 | rcu_read_lock(); | |
429 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 430 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
431 | if (num >= maxnum) |
432 | goto out; | |
433 | ||
9d6f229f | 434 | if (has_expired(br, f)) |
1da177e4 LT |
435 | continue; |
436 | ||
43598813 | 437 | /* ignore pseudo entry for local MAC address */ |
438 | if (!f->dst) | |
439 | continue; | |
440 | ||
1da177e4 LT |
441 | if (skip) { |
442 | --skip; | |
443 | continue; | |
444 | } | |
445 | ||
446 | /* convert from internal format to API */ | |
447 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
448 | |
449 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 450 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
451 | fe->port_hi = f->dst->port_no >> 8; |
452 | ||
1da177e4 LT |
453 | fe->is_local = f->is_local; |
454 | if (!f->is_static) | |
a399a805 | 455 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
456 | ++fe; |
457 | ++num; | |
458 | } | |
459 | } | |
460 | ||
461 | out: | |
462 | rcu_read_unlock(); | |
463 | ||
464 | return num; | |
465 | } | |
466 | ||
664de48b | 467 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
2ba071ec VY |
468 | const unsigned char *addr, |
469 | __u16 vid) | |
664de48b | 470 | { |
664de48b | 471 | struct net_bridge_fdb_entry *fdb; |
472 | ||
b67bfe0d | 473 | hlist_for_each_entry(fdb, head, hlist) { |
2ba071ec VY |
474 | if (ether_addr_equal(fdb->addr.addr, addr) && |
475 | fdb->vlan_id == vid) | |
664de48b | 476 | return fdb; |
477 | } | |
478 | return NULL; | |
479 | } | |
480 | ||
481 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, | |
2ba071ec VY |
482 | const unsigned char *addr, |
483 | __u16 vid) | |
1da177e4 | 484 | { |
1da177e4 LT |
485 | struct net_bridge_fdb_entry *fdb; |
486 | ||
b67bfe0d | 487 | hlist_for_each_entry_rcu(fdb, head, hlist) { |
2ba071ec VY |
488 | if (ether_addr_equal(fdb->addr.addr, addr) && |
489 | fdb->vlan_id == vid) | |
1da177e4 LT |
490 | return fdb; |
491 | } | |
492 | return NULL; | |
493 | } | |
494 | ||
495 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, | |
496 | struct net_bridge_port *source, | |
2ba071ec VY |
497 | const unsigned char *addr, |
498 | __u16 vid) | |
1da177e4 LT |
499 | { |
500 | struct net_bridge_fdb_entry *fdb; | |
501 | ||
502 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
503 | if (fdb) { | |
504 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 505 | fdb->dst = source; |
2ba071ec | 506 | fdb->vlan_id = vid; |
03e9b64b | 507 | fdb->is_local = 0; |
508 | fdb->is_static = 0; | |
a5642ab4 | 509 | fdb->added_by_user = 0; |
cf6b8e1e | 510 | fdb->added_by_external_learn = 0; |
7cd8861a | 511 | fdb->updated = fdb->used = jiffies; |
1158f762 | 512 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
513 | } |
514 | return fdb; | |
515 | } | |
516 | ||
517 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 518 | const unsigned char *addr, u16 vid) |
1da177e4 | 519 | { |
bc9a25d2 | 520 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
521 | struct net_bridge_fdb_entry *fdb; |
522 | ||
523 | if (!is_valid_ether_addr(addr)) | |
524 | return -EINVAL; | |
525 | ||
bc9a25d2 | 526 | fdb = fdb_find(head, addr, vid); |
1da177e4 | 527 | if (fdb) { |
9d6f229f | 528 | /* it is okay to have multiple ports with same |
1da177e4 LT |
529 | * address, just use the first one. |
530 | */ | |
9d6f229f | 531 | if (fdb->is_local) |
1da177e4 | 532 | return 0; |
28a16c97 | 533 | br_warn(br, "adding interface %s with same address " |
1da177e4 | 534 | "as a received packet\n", |
9b46922e | 535 | source ? source->dev->name : br->dev->name); |
31e8a49c | 536 | fdb_delete(br, fdb); |
9d6f229f | 537 | } |
1da177e4 | 538 | |
bc9a25d2 | 539 | fdb = fdb_create(head, source, addr, vid); |
03e9b64b | 540 | if (!fdb) |
1da177e4 LT |
541 | return -ENOMEM; |
542 | ||
03e9b64b | 543 | fdb->is_local = fdb->is_static = 1; |
020ec6ba | 544 | fdb_add_hw_addr(br, addr); |
31e8a49c | 545 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
546 | return 0; |
547 | } | |
548 | ||
03e9b64b | 549 | /* Add entry for local address of interface */ |
1da177e4 | 550 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 551 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
552 | { |
553 | int ret; | |
554 | ||
555 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 556 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
557 | spin_unlock_bh(&br->hash_lock); |
558 | return ret; | |
559 | } | |
560 | ||
561 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 562 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 563 | { |
2ba071ec | 564 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 565 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 566 | bool fdb_modified = false; |
1da177e4 LT |
567 | |
568 | /* some users want to always flood. */ | |
569 | if (hold_time(br) == 0) | |
570 | return; | |
571 | ||
df1c0b84 SH |
572 | /* ignore packets unless we are using this port */ |
573 | if (!(source->state == BR_STATE_LEARNING || | |
574 | source->state == BR_STATE_FORWARDING)) | |
575 | return; | |
576 | ||
2ba071ec | 577 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
578 | if (likely(fdb)) { |
579 | /* attempt to update an entry for a local interface */ | |
580 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 581 | if (net_ratelimit()) |
28a16c97 | 582 | br_warn(br, "received packet on %s with " |
583 | "own address as source address\n", | |
584 | source->dev->name); | |
1da177e4 LT |
585 | } else { |
586 | /* fastpath: update of existing entry */ | |
c65c7a30 JM |
587 | if (unlikely(source != fdb->dst)) { |
588 | fdb->dst = source; | |
589 | fdb_modified = true; | |
590 | } | |
7cd8861a | 591 | fdb->updated = jiffies; |
a5642ab4 TM |
592 | if (unlikely(added_by_user)) |
593 | fdb->added_by_user = 1; | |
c65c7a30 JM |
594 | if (unlikely(fdb_modified)) |
595 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1da177e4 LT |
596 | } |
597 | } else { | |
f8ae737d | 598 | spin_lock(&br->hash_lock); |
2ba071ec VY |
599 | if (likely(!fdb_find(head, addr, vid))) { |
600 | fdb = fdb_create(head, source, addr, vid); | |
a5642ab4 TM |
601 | if (fdb) { |
602 | if (unlikely(added_by_user)) | |
603 | fdb->added_by_user = 1; | |
31e8a49c | 604 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 605 | } |
f58ee4e1 | 606 | } |
1da177e4 LT |
607 | /* else we lose race and someone else inserts |
608 | * it first, don't bother updating | |
609 | */ | |
f8ae737d | 610 | spin_unlock(&br->hash_lock); |
1da177e4 | 611 | } |
1da177e4 | 612 | } |
b078f0df | 613 | |
3741873b RP |
614 | static int fdb_to_nud(const struct net_bridge *br, |
615 | const struct net_bridge_fdb_entry *fdb) | |
b078f0df | 616 | { |
617 | if (fdb->is_local) | |
618 | return NUD_PERMANENT; | |
619 | else if (fdb->is_static) | |
620 | return NUD_NOARP; | |
3741873b | 621 | else if (has_expired(br, fdb)) |
b078f0df | 622 | return NUD_STALE; |
623 | else | |
624 | return NUD_REACHABLE; | |
625 | } | |
626 | ||
31e8a49c | 627 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 628 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 629 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 630 | { |
631 | unsigned long now = jiffies; | |
632 | struct nda_cacheinfo ci; | |
633 | struct nlmsghdr *nlh; | |
634 | struct ndmsg *ndm; | |
635 | ||
15e47304 | 636 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 637 | if (nlh == NULL) |
638 | return -EMSGSIZE; | |
639 | ||
b078f0df | 640 | ndm = nlmsg_data(nlh); |
641 | ndm->ndm_family = AF_BRIDGE; | |
642 | ndm->ndm_pad1 = 0; | |
643 | ndm->ndm_pad2 = 0; | |
cf6b8e1e | 644 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
b078f0df | 645 | ndm->ndm_type = 0; |
43598813 | 646 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
3741873b | 647 | ndm->ndm_state = fdb_to_nud(br, fdb); |
b078f0df | 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 | ||
687 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
688 | if (skb == NULL) | |
689 | goto errout; | |
690 | ||
31e8a49c | 691 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 692 | if (err < 0) { |
693 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
694 | WARN_ON(err == -EMSGSIZE); | |
695 | kfree_skb(skb); | |
696 | goto errout; | |
697 | } | |
698 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
699 | return; | |
700 | errout: | |
87e823b3 | 701 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 702 | } |
703 | ||
704 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
705 | int br_fdb_dump(struct sk_buff *skb, |
706 | struct netlink_callback *cb, | |
707 | struct net_device *dev, | |
5d5eacb3 | 708 | struct net_device *filter_dev, |
77162022 | 709 | int idx) |
b078f0df | 710 | { |
77162022 JF |
711 | struct net_bridge *br = netdev_priv(dev); |
712 | int i; | |
b078f0df | 713 | |
77162022 JF |
714 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
715 | goto out; | |
b078f0df | 716 | |
6cb69742 HS |
717 | if (!filter_dev) |
718 | idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
719 | ||
77162022 | 720 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 721 | struct net_bridge_fdb_entry *f; |
b078f0df | 722 | |
b67bfe0d | 723 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
77162022 JF |
724 | if (idx < cb->args[0]) |
725 | goto skip; | |
726 | ||
5e6d2435 JHS |
727 | if (filter_dev && |
728 | (!f->dst || f->dst->dev != filter_dev)) { | |
729 | if (filter_dev != dev) | |
730 | goto skip; | |
6cb69742 | 731 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
732 | * It means the MAC belongs to the bridge |
733 | * Therefore need a little more filtering | |
734 | * we only want to dump the !f->dst case | |
735 | */ | |
736 | if (f->dst) | |
737 | goto skip; | |
738 | } | |
6cb69742 HS |
739 | if (!filter_dev && f->dst) |
740 | goto skip; | |
5d5eacb3 | 741 | |
77162022 | 742 | if (fdb_fill_info(skb, br, f, |
15e47304 | 743 | NETLINK_CB(cb->skb).portid, |
77162022 JF |
744 | cb->nlh->nlmsg_seq, |
745 | RTM_NEWNEIGH, | |
746 | NLM_F_MULTI) < 0) | |
747 | break; | |
b078f0df | 748 | skip: |
77162022 | 749 | ++idx; |
b078f0df | 750 | } |
751 | } | |
b078f0df | 752 | |
77162022 JF |
753 | out: |
754 | return idx; | |
b078f0df | 755 | } |
36fd2b63 | 756 | |
292d1398 | 757 | /* Update (create or replace) forwarding database entry */ |
36fd2b63 | 758 | static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr, |
2ba071ec | 759 | __u16 state, __u16 flags, __u16 vid) |
36fd2b63 | 760 | { |
761 | struct net_bridge *br = source->br; | |
2ba071ec | 762 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 763 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 764 | bool modified = false; |
36fd2b63 | 765 | |
eb8d7baa WK |
766 | /* If the port cannot learn allow only local and static entries */ |
767 | if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) && | |
768 | !(source->state == BR_STATE_LEARNING || | |
769 | source->state == BR_STATE_FORWARDING)) | |
770 | return -EPERM; | |
771 | ||
2ba071ec | 772 | fdb = fdb_find(head, addr, vid); |
64af1bac | 773 | if (fdb == NULL) { |
774 | if (!(flags & NLM_F_CREATE)) | |
775 | return -ENOENT; | |
36fd2b63 | 776 | |
2ba071ec | 777 | fdb = fdb_create(head, source, addr, vid); |
64af1bac | 778 | if (!fdb) |
779 | return -ENOMEM; | |
b0a397fb | 780 | |
781 | modified = true; | |
64af1bac | 782 | } else { |
783 | if (flags & NLM_F_EXCL) | |
784 | return -EEXIST; | |
b0a397fb | 785 | |
786 | if (fdb->dst != source) { | |
787 | fdb->dst = source; | |
788 | modified = true; | |
789 | } | |
292d1398 | 790 | } |
791 | ||
3741873b | 792 | if (fdb_to_nud(br, fdb) != state) { |
145beee8 VY |
793 | if (state & NUD_PERMANENT) { |
794 | fdb->is_local = 1; | |
795 | if (!fdb->is_static) { | |
796 | fdb->is_static = 1; | |
020ec6ba | 797 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
798 | } |
799 | } else if (state & NUD_NOARP) { | |
800 | fdb->is_local = 0; | |
801 | if (!fdb->is_static) { | |
802 | fdb->is_static = 1; | |
020ec6ba | 803 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
804 | } |
805 | } else { | |
292d1398 | 806 | fdb->is_local = 0; |
145beee8 VY |
807 | if (fdb->is_static) { |
808 | fdb->is_static = 0; | |
020ec6ba | 809 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
810 | } |
811 | } | |
64af1bac | 812 | |
b0a397fb | 813 | modified = true; |
814 | } | |
a5642ab4 | 815 | fdb->added_by_user = 1; |
b0a397fb | 816 | |
817 | fdb->used = jiffies; | |
818 | if (modified) { | |
819 | fdb->updated = jiffies; | |
31e8a49c | 820 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 821 | } |
36fd2b63 | 822 | |
36fd2b63 | 823 | return 0; |
824 | } | |
825 | ||
1690be63 VY |
826 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p, |
827 | const unsigned char *addr, u16 nlh_flags, u16 vid) | |
828 | { | |
829 | int err = 0; | |
830 | ||
831 | if (ndm->ndm_flags & NTF_USE) { | |
c4c832f8 | 832 | local_bh_disable(); |
1690be63 | 833 | rcu_read_lock(); |
a5642ab4 | 834 | br_fdb_update(p->br, p, addr, vid, true); |
1690be63 | 835 | rcu_read_unlock(); |
c4c832f8 | 836 | local_bh_enable(); |
1690be63 VY |
837 | } else { |
838 | spin_lock_bh(&p->br->hash_lock); | |
839 | err = fdb_add_entry(p, addr, ndm->ndm_state, | |
840 | nlh_flags, vid); | |
841 | spin_unlock_bh(&p->br->hash_lock); | |
842 | } | |
843 | ||
844 | return err; | |
845 | } | |
846 | ||
36fd2b63 | 847 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 848 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
849 | struct net_device *dev, | |
f6f6424b | 850 | const unsigned char *addr, u16 vid, u16 nlh_flags) |
36fd2b63 | 851 | { |
2594e906 | 852 | struct net_bridge_vlan_group *vg; |
3741873b | 853 | struct net_bridge_port *p = NULL; |
2594e906 | 854 | struct net_bridge_vlan *v; |
3741873b | 855 | struct net_bridge *br = NULL; |
77162022 | 856 | int err = 0; |
36fd2b63 | 857 | |
292d1398 | 858 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
859 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
860 | return -EINVAL; | |
861 | } | |
862 | ||
537f7f84 SH |
863 | if (is_zero_ether_addr(addr)) { |
864 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
3741873b RP |
868 | if (dev->priv_flags & IFF_EBRIDGE) { |
869 | br = netdev_priv(dev); | |
870 | vg = br_vlan_group(br); | |
871 | } else { | |
872 | p = br_port_get_rtnl(dev); | |
873 | if (!p) { | |
874 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
875 | dev->name); | |
876 | return -EINVAL; | |
877 | } | |
878 | vg = nbp_vlan_group(p); | |
36fd2b63 | 879 | } |
880 | ||
f6f6424b | 881 | if (vid) { |
2594e906 | 882 | v = br_vlan_find(vg, vid); |
3741873b RP |
883 | if (!v || !br_vlan_should_use(v)) { |
884 | pr_info("bridge: RTM_NEWNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); | |
1690be63 VY |
885 | return -EINVAL; |
886 | } | |
887 | ||
888 | /* VID was specified, so use it. */ | |
3741873b RP |
889 | if (dev->priv_flags & IFF_EBRIDGE) |
890 | err = br_fdb_insert(br, NULL, addr, vid); | |
891 | else | |
892 | err = __br_fdb_add(ndm, p, addr, nlh_flags, vid); | |
292d1398 | 893 | } else { |
3741873b RP |
894 | if (dev->priv_flags & IFF_EBRIDGE) |
895 | err = br_fdb_insert(br, NULL, addr, 0); | |
896 | else | |
897 | err = __br_fdb_add(ndm, p, addr, nlh_flags, 0); | |
2594e906 | 898 | if (err || !vg || !vg->num_vlans) |
1690be63 | 899 | goto out; |
1690be63 VY |
900 | |
901 | /* We have vlans configured on this port and user didn't | |
902 | * specify a VLAN. To be nice, add/update entry for every | |
903 | * vlan on this port. | |
904 | */ | |
2594e906 | 905 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
3741873b RP |
906 | if (!br_vlan_should_use(v)) |
907 | continue; | |
908 | if (dev->priv_flags & IFF_EBRIDGE) | |
909 | err = br_fdb_insert(br, NULL, addr, v->vid); | |
910 | else | |
911 | err = __br_fdb_add(ndm, p, addr, nlh_flags, | |
912 | v->vid); | |
1690be63 VY |
913 | if (err) |
914 | goto out; | |
1690be63 | 915 | } |
292d1398 | 916 | } |
36fd2b63 | 917 | |
1690be63 | 918 | out: |
36fd2b63 | 919 | return err; |
920 | } | |
921 | ||
3741873b RP |
922 | static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, |
923 | u16 vid) | |
924 | { | |
925 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
926 | struct net_bridge_fdb_entry *fdb; | |
927 | ||
928 | fdb = fdb_find(head, addr, vid); | |
929 | if (!fdb) | |
930 | return -ENOENT; | |
931 | ||
932 | fdb_delete(br, fdb); | |
933 | return 0; | |
934 | } | |
935 | ||
936 | static int __br_fdb_delete_by_addr(struct net_bridge *br, | |
937 | const unsigned char *addr, u16 vid) | |
938 | { | |
939 | int err; | |
940 | ||
941 | spin_lock_bh(&br->hash_lock); | |
942 | err = fdb_delete_by_addr(br, addr, vid); | |
943 | spin_unlock_bh(&br->hash_lock); | |
944 | ||
945 | return err; | |
946 | } | |
947 | ||
8c86f967 NA |
948 | static int fdb_delete_by_addr_and_port(struct net_bridge_port *p, |
949 | const u8 *addr, u16 vlan) | |
36fd2b63 | 950 | { |
8c86f967 | 951 | struct net_bridge *br = p->br; |
1690be63 | 952 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
36fd2b63 | 953 | struct net_bridge_fdb_entry *fdb; |
954 | ||
1690be63 | 955 | fdb = fdb_find(head, addr, vlan); |
8c86f967 | 956 | if (!fdb || fdb->dst != p) |
36fd2b63 | 957 | return -ENOENT; |
958 | ||
1690be63 | 959 | fdb_delete(br, fdb); |
36fd2b63 | 960 | return 0; |
961 | } | |
962 | ||
1690be63 VY |
963 | static int __br_fdb_delete(struct net_bridge_port *p, |
964 | const unsigned char *addr, u16 vid) | |
965 | { | |
966 | int err; | |
967 | ||
968 | spin_lock_bh(&p->br->hash_lock); | |
8c86f967 | 969 | err = fdb_delete_by_addr_and_port(p, addr, vid); |
1690be63 VY |
970 | spin_unlock_bh(&p->br->hash_lock); |
971 | ||
972 | return err; | |
973 | } | |
974 | ||
36fd2b63 | 975 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
976 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
977 | struct net_device *dev, | |
f6f6424b | 978 | const unsigned char *addr, u16 vid) |
36fd2b63 | 979 | { |
2594e906 | 980 | struct net_bridge_vlan_group *vg; |
3741873b | 981 | struct net_bridge_port *p = NULL; |
2594e906 | 982 | struct net_bridge_vlan *v; |
3741873b | 983 | struct net_bridge *br = NULL; |
36fd2b63 | 984 | int err; |
1690be63 | 985 | |
3741873b RP |
986 | if (dev->priv_flags & IFF_EBRIDGE) { |
987 | br = netdev_priv(dev); | |
988 | vg = br_vlan_group(br); | |
989 | } else { | |
990 | p = br_port_get_rtnl(dev); | |
991 | if (!p) { | |
992 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
993 | dev->name); | |
994 | return -EINVAL; | |
995 | } | |
996 | vg = nbp_vlan_group(p); | |
36fd2b63 | 997 | } |
998 | ||
f6f6424b | 999 | if (vid) { |
2594e906 NA |
1000 | v = br_vlan_find(vg, vid); |
1001 | if (!v) { | |
3741873b | 1002 | pr_info("bridge: RTM_DELNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); |
1690be63 VY |
1003 | return -EINVAL; |
1004 | } | |
36fd2b63 | 1005 | |
3741873b RP |
1006 | if (dev->priv_flags & IFF_EBRIDGE) |
1007 | err = __br_fdb_delete_by_addr(br, addr, vid); | |
1008 | else | |
1009 | err = __br_fdb_delete(p, addr, vid); | |
1690be63 | 1010 | } else { |
25d3b493 | 1011 | err = -ENOENT; |
3741873b RP |
1012 | if (dev->priv_flags & IFF_EBRIDGE) |
1013 | err = __br_fdb_delete_by_addr(br, addr, 0); | |
1014 | else | |
1015 | err &= __br_fdb_delete(p, addr, 0); | |
1016 | ||
2594e906 | 1017 | if (!vg || !vg->num_vlans) |
1690be63 | 1018 | goto out; |
1690be63 | 1019 | |
3741873b RP |
1020 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
1021 | if (!br_vlan_should_use(v)) | |
1022 | continue; | |
1023 | if (dev->priv_flags & IFF_EBRIDGE) | |
1024 | err = __br_fdb_delete_by_addr(br, addr, v->vid); | |
1025 | else | |
1026 | err &= __br_fdb_delete(p, addr, v->vid); | |
1027 | } | |
1690be63 VY |
1028 | } |
1029 | out: | |
36fd2b63 | 1030 | return err; |
1031 | } | |
8db24af7 VY |
1032 | |
1033 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1034 | { | |
1035 | struct net_bridge_fdb_entry *fdb, *tmp; | |
1036 | int i; | |
1037 | int err; | |
1038 | ||
1039 | ASSERT_RTNL(); | |
1040 | ||
1041 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1042 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
1043 | /* We only care for static entries */ | |
1044 | if (!fdb->is_static) | |
1045 | continue; | |
1046 | ||
1047 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
1048 | if (err) | |
1049 | goto rollback; | |
1050 | } | |
1051 | } | |
1052 | return 0; | |
1053 | ||
1054 | rollback: | |
1055 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1056 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
1057 | /* If we reached the fdb that failed, we can stop */ | |
1058 | if (tmp == fdb) | |
1059 | break; | |
1060 | ||
1061 | /* We only care for static entries */ | |
1062 | if (!tmp->is_static) | |
1063 | continue; | |
1064 | ||
1065 | dev_uc_del(p->dev, tmp->addr.addr); | |
1066 | } | |
1067 | } | |
1068 | return err; | |
1069 | } | |
1070 | ||
1071 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1072 | { | |
1073 | struct net_bridge_fdb_entry *fdb; | |
1074 | int i; | |
1075 | ||
1076 | ASSERT_RTNL(); | |
1077 | ||
1078 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1079 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
1080 | /* We only care for static entries */ | |
1081 | if (!fdb->is_static) | |
1082 | continue; | |
1083 | ||
1084 | dev_uc_del(p->dev, fdb->addr.addr); | |
1085 | } | |
1086 | } | |
1087 | } | |
cf6b8e1e | 1088 | |
3aeb6617 | 1089 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1090 | const unsigned char *addr, u16 vid) |
1091 | { | |
cf6b8e1e SF |
1092 | struct hlist_head *head; |
1093 | struct net_bridge_fdb_entry *fdb; | |
1094 | int err = 0; | |
1095 | ||
3aeb6617 | 1096 | ASSERT_RTNL(); |
cf6b8e1e SF |
1097 | spin_lock_bh(&br->hash_lock); |
1098 | ||
1099 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1100 | fdb = fdb_find(head, addr, vid); | |
1101 | if (!fdb) { | |
1102 | fdb = fdb_create(head, p, addr, vid); | |
1103 | if (!fdb) { | |
1104 | err = -ENOMEM; | |
1105 | goto err_unlock; | |
1106 | } | |
1107 | fdb->added_by_external_learn = 1; | |
1108 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1109 | } else if (fdb->added_by_external_learn) { | |
1110 | /* Refresh entry */ | |
1111 | fdb->updated = fdb->used = jiffies; | |
1112 | } else if (!fdb->added_by_user) { | |
1113 | /* Take over SW learned entry */ | |
1114 | fdb->added_by_external_learn = 1; | |
1115 | fdb->updated = jiffies; | |
1116 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1117 | } | |
1118 | ||
1119 | err_unlock: | |
1120 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1121 | |
1122 | return err; | |
1123 | } | |
cf6b8e1e | 1124 | |
3aeb6617 | 1125 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1126 | const unsigned char *addr, u16 vid) |
1127 | { | |
cf6b8e1e SF |
1128 | struct hlist_head *head; |
1129 | struct net_bridge_fdb_entry *fdb; | |
1130 | int err = 0; | |
1131 | ||
3aeb6617 | 1132 | ASSERT_RTNL(); |
cf6b8e1e SF |
1133 | spin_lock_bh(&br->hash_lock); |
1134 | ||
1135 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1136 | fdb = fdb_find(head, addr, vid); | |
1137 | if (fdb && fdb->added_by_external_learn) | |
1138 | fdb_delete(br, fdb); | |
1139 | else | |
1140 | err = -ENOENT; | |
1141 | ||
1142 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1143 | |
1144 | return err; | |
1145 | } |