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Commit | Line | Data |
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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 | 137 | .obj = { |
6ff64f6f | 138 | .orig_dev = f->dst->dev, |
56607386 JP |
139 | .id = SWITCHDEV_OBJ_ID_PORT_FDB, |
140 | .flags = SWITCHDEV_F_DEFER, | |
141 | }, | |
ab069002 | 142 | .vid = f->vlan_id, |
b4ad7baa SF |
143 | }; |
144 | ||
850d0cbc | 145 | ether_addr_copy(fdb.addr, f->addr.addr); |
9e8f4a54 | 146 | switchdev_port_obj_del(f->dst->dev, &fdb.obj); |
b4ad7baa SF |
147 | } |
148 | ||
31e8a49c | 149 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f) |
1da177e4 | 150 | { |
145beee8 | 151 | if (f->is_static) |
020ec6ba | 152 | fdb_del_hw_addr(br, f->addr.addr); |
145beee8 | 153 | |
b4ad7baa SF |
154 | if (f->added_by_external_learn) |
155 | fdb_del_external_learn(f); | |
156 | ||
1da177e4 | 157 | hlist_del_rcu(&f->hlist); |
31e8a49c | 158 | fdb_notify(br, f, RTM_DELNEIGH); |
da678292 | 159 | call_rcu(&f->rcu, fdb_rcu_free); |
1da177e4 LT |
160 | } |
161 | ||
960b589f TM |
162 | /* Delete a local entry if no other port had the same address. */ |
163 | static void fdb_delete_local(struct net_bridge *br, | |
164 | const struct net_bridge_port *p, | |
165 | struct net_bridge_fdb_entry *f) | |
166 | { | |
167 | const unsigned char *addr = f->addr.addr; | |
2594e906 NA |
168 | struct net_bridge_vlan_group *vg; |
169 | const struct net_bridge_vlan *v; | |
960b589f | 170 | struct net_bridge_port *op; |
2594e906 | 171 | u16 vid = f->vlan_id; |
960b589f TM |
172 | |
173 | /* Maybe another port has same hw addr? */ | |
174 | list_for_each_entry(op, &br->port_list, list) { | |
2594e906 | 175 | vg = nbp_vlan_group(op); |
960b589f | 176 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && |
2594e906 | 177 | (!vid || br_vlan_find(vg, vid))) { |
960b589f | 178 | f->dst = op; |
a778e6d1 | 179 | f->added_by_user = 0; |
960b589f TM |
180 | return; |
181 | } | |
182 | } | |
183 | ||
2594e906 NA |
184 | vg = br_vlan_group(br); |
185 | v = br_vlan_find(vg, vid); | |
960b589f TM |
186 | /* Maybe bridge device has same hw addr? */ |
187 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
2594e906 | 188 | (!vid || (v && br_vlan_should_use(v)))) { |
960b589f | 189 | f->dst = NULL; |
a778e6d1 | 190 | f->added_by_user = 0; |
960b589f TM |
191 | return; |
192 | } | |
193 | ||
194 | fdb_delete(br, f); | |
195 | } | |
196 | ||
424bb9c9 TM |
197 | void br_fdb_find_delete_local(struct net_bridge *br, |
198 | const struct net_bridge_port *p, | |
199 | const unsigned char *addr, u16 vid) | |
200 | { | |
201 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
202 | struct net_bridge_fdb_entry *f; | |
203 | ||
204 | spin_lock_bh(&br->hash_lock); | |
205 | f = fdb_find(head, addr, vid); | |
206 | if (f && f->is_local && !f->added_by_user && f->dst == p) | |
207 | fdb_delete_local(br, p, f); | |
208 | spin_unlock_bh(&br->hash_lock); | |
209 | } | |
210 | ||
1da177e4 LT |
211 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
212 | { | |
2594e906 | 213 | struct net_bridge_vlan_group *vg; |
1da177e4 | 214 | struct net_bridge *br = p->br; |
2594e906 | 215 | struct net_bridge_vlan *v; |
1da177e4 | 216 | int i; |
9d6f229f | 217 | |
1da177e4 LT |
218 | spin_lock_bh(&br->hash_lock); |
219 | ||
2594e906 | 220 | vg = nbp_vlan_group(p); |
1da177e4 LT |
221 | /* Search all chains since old address/hash is unknown */ |
222 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
223 | struct hlist_node *h; | |
224 | hlist_for_each(h, &br->hash[i]) { | |
225 | struct net_bridge_fdb_entry *f; | |
226 | ||
227 | f = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
a5642ab4 | 228 | if (f->dst == p && f->is_local && !f->added_by_user) { |
1da177e4 | 229 | /* delete old one */ |
960b589f TM |
230 | fdb_delete_local(br, p, f); |
231 | ||
bc9a25d2 VY |
232 | /* if this port has no vlan information |
233 | * configured, we can safely be done at | |
234 | * this point. | |
235 | */ | |
2594e906 | 236 | if (!vg || !vg->num_vlans) |
2836882f | 237 | goto insert; |
1da177e4 LT |
238 | } |
239 | } | |
240 | } | |
1da177e4 | 241 | |
2836882f TM |
242 | insert: |
243 | /* insert new address, may fail if invalid address or dup. */ | |
244 | fdb_insert(br, p, newaddr, 0); | |
245 | ||
2594e906 | 246 | if (!vg || !vg->num_vlans) |
2836882f TM |
247 | goto done; |
248 | ||
249 | /* Now add entries for every VLAN configured on the port. | |
250 | * This function runs under RTNL so the bitmap will not change | |
251 | * from under us. | |
252 | */ | |
2594e906 NA |
253 | list_for_each_entry(v, &vg->vlan_list, vlist) |
254 | fdb_insert(br, p, newaddr, v->vid); | |
2836882f | 255 | |
bc9a25d2 | 256 | done: |
1da177e4 LT |
257 | spin_unlock_bh(&br->hash_lock); |
258 | } | |
259 | ||
43598813 | 260 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
261 | { | |
2594e906 | 262 | struct net_bridge_vlan_group *vg; |
43598813 | 263 | struct net_bridge_fdb_entry *f; |
2594e906 | 264 | struct net_bridge_vlan *v; |
43598813 | 265 | |
ac4c8868 TM |
266 | spin_lock_bh(&br->hash_lock); |
267 | ||
43598813 | 268 | /* If old entry was unassociated with any port, then delete it. */ |
2ba071ec | 269 | f = __br_fdb_get(br, br->dev->dev_addr, 0); |
7bb90c37 | 270 | if (f && f->is_local && !f->dst && !f->added_by_user) |
960b589f | 271 | fdb_delete_local(br, NULL, f); |
43598813 | 272 | |
bc9a25d2 | 273 | fdb_insert(br, NULL, newaddr, 0); |
2594e906 NA |
274 | vg = br_vlan_group(br); |
275 | if (!vg || !vg->num_vlans) | |
276 | goto out; | |
bc9a25d2 VY |
277 | /* Now remove and add entries for every VLAN configured on the |
278 | * bridge. This function runs under RTNL so the bitmap will not | |
279 | * change from under us. | |
280 | */ | |
2594e906 | 281 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
0b148def TM |
282 | if (!br_vlan_should_use(v)) |
283 | continue; | |
2594e906 | 284 | f = __br_fdb_get(br, br->dev->dev_addr, v->vid); |
7bb90c37 | 285 | if (f && f->is_local && !f->dst && !f->added_by_user) |
960b589f | 286 | fdb_delete_local(br, NULL, f); |
2594e906 | 287 | fdb_insert(br, NULL, newaddr, v->vid); |
bc9a25d2 | 288 | } |
ac4c8868 TM |
289 | out: |
290 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 291 | } |
292 | ||
1da177e4 LT |
293 | void br_fdb_cleanup(unsigned long _data) |
294 | { | |
295 | struct net_bridge *br = (struct net_bridge *)_data; | |
296 | unsigned long delay = hold_time(br); | |
25442e06 | 297 | unsigned long next_timer = jiffies + br->ageing_time; |
1da177e4 LT |
298 | int i; |
299 | ||
27a42938 | 300 | spin_lock(&br->hash_lock); |
1da177e4 LT |
301 | for (i = 0; i < BR_HASH_SIZE; i++) { |
302 | struct net_bridge_fdb_entry *f; | |
b67bfe0d | 303 | struct hlist_node *n; |
1da177e4 | 304 | |
b67bfe0d | 305 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { |
071f7722 | 306 | unsigned long this_timer; |
3fcf9011 | 307 | if (f->is_static) |
071f7722 | 308 | continue; |
dcd45e06 SM |
309 | if (f->added_by_external_learn) |
310 | continue; | |
7cd8861a | 311 | this_timer = f->updated + delay; |
071f7722 | 312 | if (time_before_eq(this_timer, jiffies)) |
31e8a49c | 313 | fdb_delete(br, f); |
2bec008c | 314 | else if (time_before(this_timer, next_timer)) |
071f7722 | 315 | next_timer = this_timer; |
1da177e4 LT |
316 | } |
317 | } | |
27a42938 | 318 | spin_unlock(&br->hash_lock); |
1da177e4 | 319 | |
25442e06 | 320 | mod_timer(&br->gc_timer, round_jiffies_up(next_timer)); |
1da177e4 LT |
321 | } |
322 | ||
9cf63747 SH |
323 | /* Completely flush all dynamic entries in forwarding database.*/ |
324 | void br_fdb_flush(struct net_bridge *br) | |
325 | { | |
326 | int i; | |
327 | ||
328 | spin_lock_bh(&br->hash_lock); | |
329 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
330 | struct net_bridge_fdb_entry *f; | |
b67bfe0d SL |
331 | struct hlist_node *n; |
332 | hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) { | |
9cf63747 | 333 | if (!f->is_static) |
31e8a49c | 334 | fdb_delete(br, f); |
9cf63747 SH |
335 | } |
336 | } | |
337 | spin_unlock_bh(&br->hash_lock); | |
338 | } | |
1a620698 | 339 | |
25985edc | 340 | /* Flush all entries referring to a specific port. |
9cf63747 | 341 | * if do_all is set also flush static entries |
1ea2d020 | 342 | * if vid is set delete all entries that match the vlan_id |
9cf63747 | 343 | */ |
1a620698 SH |
344 | void br_fdb_delete_by_port(struct net_bridge *br, |
345 | const struct net_bridge_port *p, | |
1ea2d020 | 346 | u16 vid, |
1a620698 | 347 | int do_all) |
1da177e4 LT |
348 | { |
349 | int i; | |
350 | ||
351 | spin_lock_bh(&br->hash_lock); | |
352 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
353 | struct hlist_node *h, *g; | |
9d6f229f | 354 | |
1da177e4 LT |
355 | hlist_for_each_safe(h, g, &br->hash[i]) { |
356 | struct net_bridge_fdb_entry *f | |
357 | = hlist_entry(h, struct net_bridge_fdb_entry, hlist); | |
9d6f229f | 358 | if (f->dst != p) |
1da177e4 LT |
359 | continue; |
360 | ||
1ea2d020 NA |
361 | if (!do_all) |
362 | if (f->is_static || (vid && f->vlan_id != vid)) | |
363 | continue; | |
1da177e4 | 364 | |
a778e6d1 TM |
365 | if (f->is_local) |
366 | fdb_delete_local(br, p, f); | |
367 | else | |
368 | fdb_delete(br, f); | |
1da177e4 LT |
369 | } |
370 | } | |
371 | spin_unlock_bh(&br->hash_lock); | |
372 | } | |
373 | ||
eeaf61d8 | 374 | /* No locking or refcounting, assumes caller has rcu_read_lock */ |
1da177e4 | 375 | struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, |
2ba071ec VY |
376 | const unsigned char *addr, |
377 | __u16 vid) | |
1da177e4 | 378 | { |
1da177e4 LT |
379 | struct net_bridge_fdb_entry *fdb; |
380 | ||
b67bfe0d | 381 | hlist_for_each_entry_rcu(fdb, |
2ba071ec VY |
382 | &br->hash[br_mac_hash(addr, vid)], hlist) { |
383 | if (ether_addr_equal(fdb->addr.addr, addr) && | |
384 | fdb->vlan_id == vid) { | |
1da177e4 LT |
385 | if (unlikely(has_expired(br, fdb))) |
386 | break; | |
387 | return fdb; | |
388 | } | |
389 | } | |
390 | ||
391 | return NULL; | |
392 | } | |
393 | ||
e6373c4c | 394 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
395 | /* Interface used by ATM LANE hook to test |
396 | * if an addr is on some other bridge port */ | |
397 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
398 | { |
399 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 400 | struct net_bridge_port *port; |
da678292 MM |
401 | int ret; |
402 | ||
1da177e4 | 403 | rcu_read_lock(); |
b5ed54e9 | 404 | port = br_port_get_rcu(dev); |
405 | if (!port) | |
406 | ret = 0; | |
407 | else { | |
2ba071ec | 408 | fdb = __br_fdb_get(port->br, addr, 0); |
43598813 | 409 | ret = fdb && fdb->dst && fdb->dst->dev != dev && |
b5ed54e9 | 410 | fdb->dst->state == BR_STATE_FORWARDING; |
411 | } | |
1da177e4 | 412 | rcu_read_unlock(); |
1da177e4 | 413 | |
da678292 | 414 | return ret; |
1da177e4 | 415 | } |
da678292 | 416 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
417 | |
418 | /* | |
9d6f229f | 419 | * Fill buffer with forwarding table records in |
1da177e4 LT |
420 | * the API format. |
421 | */ | |
422 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
423 | unsigned long maxnum, unsigned long skip) | |
424 | { | |
425 | struct __fdb_entry *fe = buf; | |
426 | int i, num = 0; | |
1da177e4 LT |
427 | struct net_bridge_fdb_entry *f; |
428 | ||
429 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
430 | ||
431 | rcu_read_lock(); | |
432 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
b67bfe0d | 433 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
1da177e4 LT |
434 | if (num >= maxnum) |
435 | goto out; | |
436 | ||
9d6f229f | 437 | if (has_expired(br, f)) |
1da177e4 LT |
438 | continue; |
439 | ||
43598813 | 440 | /* ignore pseudo entry for local MAC address */ |
441 | if (!f->dst) | |
442 | continue; | |
443 | ||
1da177e4 LT |
444 | if (skip) { |
445 | --skip; | |
446 | continue; | |
447 | } | |
448 | ||
449 | /* convert from internal format to API */ | |
450 | memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN); | |
ae4f8fca SH |
451 | |
452 | /* due to ABI compat need to split into hi/lo */ | |
1da177e4 | 453 | fe->port_no = f->dst->port_no; |
ae4f8fca SH |
454 | fe->port_hi = f->dst->port_no >> 8; |
455 | ||
1da177e4 LT |
456 | fe->is_local = f->is_local; |
457 | if (!f->is_static) | |
a399a805 | 458 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
1da177e4 LT |
459 | ++fe; |
460 | ++num; | |
461 | } | |
462 | } | |
463 | ||
464 | out: | |
465 | rcu_read_unlock(); | |
466 | ||
467 | return num; | |
468 | } | |
469 | ||
664de48b | 470 | static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head, |
2ba071ec VY |
471 | const unsigned char *addr, |
472 | __u16 vid) | |
664de48b | 473 | { |
664de48b | 474 | struct net_bridge_fdb_entry *fdb; |
475 | ||
b67bfe0d | 476 | hlist_for_each_entry(fdb, head, hlist) { |
2ba071ec VY |
477 | if (ether_addr_equal(fdb->addr.addr, addr) && |
478 | fdb->vlan_id == vid) | |
664de48b | 479 | return fdb; |
480 | } | |
481 | return NULL; | |
482 | } | |
483 | ||
484 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head, | |
2ba071ec VY |
485 | const unsigned char *addr, |
486 | __u16 vid) | |
1da177e4 | 487 | { |
1da177e4 LT |
488 | struct net_bridge_fdb_entry *fdb; |
489 | ||
b67bfe0d | 490 | hlist_for_each_entry_rcu(fdb, head, hlist) { |
2ba071ec VY |
491 | if (ether_addr_equal(fdb->addr.addr, addr) && |
492 | fdb->vlan_id == vid) | |
1da177e4 LT |
493 | return fdb; |
494 | } | |
495 | return NULL; | |
496 | } | |
497 | ||
498 | static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head, | |
499 | struct net_bridge_port *source, | |
2ba071ec | 500 | const unsigned char *addr, |
b7af1472 RP |
501 | __u16 vid, |
502 | unsigned char is_local, | |
503 | unsigned char is_static) | |
1da177e4 LT |
504 | { |
505 | struct net_bridge_fdb_entry *fdb; | |
506 | ||
507 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
508 | if (fdb) { | |
509 | memcpy(fdb->addr.addr, addr, ETH_ALEN); | |
1da177e4 | 510 | fdb->dst = source; |
2ba071ec | 511 | fdb->vlan_id = vid; |
b7af1472 RP |
512 | fdb->is_local = is_local; |
513 | fdb->is_static = is_static; | |
a5642ab4 | 514 | fdb->added_by_user = 0; |
cf6b8e1e | 515 | fdb->added_by_external_learn = 0; |
7cd8861a | 516 | fdb->updated = fdb->used = jiffies; |
1158f762 | 517 | hlist_add_head_rcu(&fdb->hlist, head); |
1da177e4 LT |
518 | } |
519 | return fdb; | |
520 | } | |
521 | ||
522 | static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source, | |
bc9a25d2 | 523 | const unsigned char *addr, u16 vid) |
1da177e4 | 524 | { |
bc9a25d2 | 525 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 LT |
526 | struct net_bridge_fdb_entry *fdb; |
527 | ||
528 | if (!is_valid_ether_addr(addr)) | |
529 | return -EINVAL; | |
530 | ||
bc9a25d2 | 531 | fdb = fdb_find(head, addr, vid); |
1da177e4 | 532 | if (fdb) { |
9d6f229f | 533 | /* it is okay to have multiple ports with same |
1da177e4 LT |
534 | * address, just use the first one. |
535 | */ | |
9d6f229f | 536 | if (fdb->is_local) |
1da177e4 | 537 | return 0; |
28a16c97 | 538 | br_warn(br, "adding interface %s with same address " |
1da177e4 | 539 | "as a received packet\n", |
9b46922e | 540 | source ? source->dev->name : br->dev->name); |
31e8a49c | 541 | fdb_delete(br, fdb); |
9d6f229f | 542 | } |
1da177e4 | 543 | |
b7af1472 | 544 | fdb = fdb_create(head, source, addr, vid, 1, 1); |
03e9b64b | 545 | if (!fdb) |
1da177e4 LT |
546 | return -ENOMEM; |
547 | ||
020ec6ba | 548 | fdb_add_hw_addr(br, addr); |
31e8a49c | 549 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
1da177e4 LT |
550 | return 0; |
551 | } | |
552 | ||
03e9b64b | 553 | /* Add entry for local address of interface */ |
1da177e4 | 554 | int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source, |
bc9a25d2 | 555 | const unsigned char *addr, u16 vid) |
1da177e4 LT |
556 | { |
557 | int ret; | |
558 | ||
559 | spin_lock_bh(&br->hash_lock); | |
bc9a25d2 | 560 | ret = fdb_insert(br, source, addr, vid); |
1da177e4 LT |
561 | spin_unlock_bh(&br->hash_lock); |
562 | return ret; | |
563 | } | |
564 | ||
565 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, | |
a5642ab4 | 566 | const unsigned char *addr, u16 vid, bool added_by_user) |
1da177e4 | 567 | { |
2ba071ec | 568 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
1da177e4 | 569 | struct net_bridge_fdb_entry *fdb; |
c65c7a30 | 570 | bool fdb_modified = false; |
1da177e4 LT |
571 | |
572 | /* some users want to always flood. */ | |
573 | if (hold_time(br) == 0) | |
574 | return; | |
575 | ||
df1c0b84 SH |
576 | /* ignore packets unless we are using this port */ |
577 | if (!(source->state == BR_STATE_LEARNING || | |
578 | source->state == BR_STATE_FORWARDING)) | |
579 | return; | |
580 | ||
2ba071ec | 581 | fdb = fdb_find_rcu(head, addr, vid); |
1da177e4 LT |
582 | if (likely(fdb)) { |
583 | /* attempt to update an entry for a local interface */ | |
584 | if (unlikely(fdb->is_local)) { | |
9d6f229f | 585 | if (net_ratelimit()) |
28a16c97 | 586 | br_warn(br, "received packet on %s with " |
587 | "own address as source address\n", | |
588 | source->dev->name); | |
1da177e4 LT |
589 | } else { |
590 | /* fastpath: update of existing entry */ | |
c65c7a30 JM |
591 | if (unlikely(source != fdb->dst)) { |
592 | fdb->dst = source; | |
593 | fdb_modified = true; | |
594 | } | |
7cd8861a | 595 | fdb->updated = jiffies; |
a5642ab4 TM |
596 | if (unlikely(added_by_user)) |
597 | fdb->added_by_user = 1; | |
c65c7a30 JM |
598 | if (unlikely(fdb_modified)) |
599 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1da177e4 LT |
600 | } |
601 | } else { | |
f8ae737d | 602 | spin_lock(&br->hash_lock); |
2ba071ec | 603 | if (likely(!fdb_find(head, addr, vid))) { |
b7af1472 | 604 | fdb = fdb_create(head, source, addr, vid, 0, 0); |
a5642ab4 TM |
605 | if (fdb) { |
606 | if (unlikely(added_by_user)) | |
607 | fdb->added_by_user = 1; | |
31e8a49c | 608 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
a5642ab4 | 609 | } |
f58ee4e1 | 610 | } |
1da177e4 LT |
611 | /* else we lose race and someone else inserts |
612 | * it first, don't bother updating | |
613 | */ | |
f8ae737d | 614 | spin_unlock(&br->hash_lock); |
1da177e4 | 615 | } |
1da177e4 | 616 | } |
b078f0df | 617 | |
3741873b RP |
618 | static int fdb_to_nud(const struct net_bridge *br, |
619 | const struct net_bridge_fdb_entry *fdb) | |
b078f0df | 620 | { |
621 | if (fdb->is_local) | |
622 | return NUD_PERMANENT; | |
623 | else if (fdb->is_static) | |
624 | return NUD_NOARP; | |
3741873b | 625 | else if (has_expired(br, fdb)) |
b078f0df | 626 | return NUD_STALE; |
627 | else | |
628 | return NUD_REACHABLE; | |
629 | } | |
630 | ||
31e8a49c | 631 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, |
b078f0df | 632 | const struct net_bridge_fdb_entry *fdb, |
15e47304 | 633 | u32 portid, u32 seq, int type, unsigned int flags) |
b078f0df | 634 | { |
635 | unsigned long now = jiffies; | |
636 | struct nda_cacheinfo ci; | |
637 | struct nlmsghdr *nlh; | |
638 | struct ndmsg *ndm; | |
639 | ||
15e47304 | 640 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); |
b078f0df | 641 | if (nlh == NULL) |
642 | return -EMSGSIZE; | |
643 | ||
b078f0df | 644 | ndm = nlmsg_data(nlh); |
645 | ndm->ndm_family = AF_BRIDGE; | |
646 | ndm->ndm_pad1 = 0; | |
647 | ndm->ndm_pad2 = 0; | |
cf6b8e1e | 648 | ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0; |
b078f0df | 649 | ndm->ndm_type = 0; |
43598813 | 650 | ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex; |
3741873b | 651 | ndm->ndm_state = fdb_to_nud(br, fdb); |
b078f0df | 652 | |
2eb812e6 DM |
653 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr)) |
654 | goto nla_put_failure; | |
41c389d7 RP |
655 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) |
656 | goto nla_put_failure; | |
b078f0df | 657 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
658 | ci.ndm_confirmed = 0; | |
659 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
660 | ci.ndm_refcnt = 0; | |
2eb812e6 DM |
661 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) |
662 | goto nla_put_failure; | |
1690be63 | 663 | |
47fab41a | 664 | if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id)) |
1690be63 VY |
665 | goto nla_put_failure; |
666 | ||
053c095a JB |
667 | nlmsg_end(skb, nlh); |
668 | return 0; | |
b078f0df | 669 | |
670 | nla_put_failure: | |
671 | nlmsg_cancel(skb, nlh); | |
672 | return -EMSGSIZE; | |
673 | } | |
674 | ||
675 | static inline size_t fdb_nlmsg_size(void) | |
676 | { | |
677 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
678 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
41c389d7 | 679 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ |
1690be63 | 680 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
b078f0df | 681 | + nla_total_size(sizeof(struct nda_cacheinfo)); |
682 | } | |
683 | ||
31e8a49c | 684 | static void fdb_notify(struct net_bridge *br, |
685 | const struct net_bridge_fdb_entry *fdb, int type) | |
b078f0df | 686 | { |
31e8a49c | 687 | struct net *net = dev_net(br->dev); |
b078f0df | 688 | struct sk_buff *skb; |
689 | int err = -ENOBUFS; | |
690 | ||
691 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
692 | if (skb == NULL) | |
693 | goto errout; | |
694 | ||
31e8a49c | 695 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); |
b078f0df | 696 | if (err < 0) { |
697 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
698 | WARN_ON(err == -EMSGSIZE); | |
699 | kfree_skb(skb); | |
700 | goto errout; | |
701 | } | |
702 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
703 | return; | |
704 | errout: | |
87e823b3 | 705 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); |
b078f0df | 706 | } |
707 | ||
708 | /* Dump information about entries, in response to GETNEIGH */ | |
77162022 JF |
709 | int br_fdb_dump(struct sk_buff *skb, |
710 | struct netlink_callback *cb, | |
711 | struct net_device *dev, | |
5d5eacb3 | 712 | struct net_device *filter_dev, |
d297653d | 713 | int *idx) |
b078f0df | 714 | { |
77162022 | 715 | struct net_bridge *br = netdev_priv(dev); |
d297653d | 716 | int err = 0; |
77162022 | 717 | int i; |
b078f0df | 718 | |
77162022 JF |
719 | if (!(dev->priv_flags & IFF_EBRIDGE)) |
720 | goto out; | |
b078f0df | 721 | |
d297653d RP |
722 | if (!filter_dev) { |
723 | err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
724 | if (err < 0) | |
725 | goto out; | |
726 | } | |
6cb69742 | 727 | |
77162022 | 728 | for (i = 0; i < BR_HASH_SIZE; i++) { |
77162022 | 729 | struct net_bridge_fdb_entry *f; |
b078f0df | 730 | |
b67bfe0d | 731 | hlist_for_each_entry_rcu(f, &br->hash[i], hlist) { |
472681d5 | 732 | |
d297653d | 733 | if (*idx < cb->args[2]) |
77162022 JF |
734 | goto skip; |
735 | ||
5e6d2435 JHS |
736 | if (filter_dev && |
737 | (!f->dst || f->dst->dev != filter_dev)) { | |
738 | if (filter_dev != dev) | |
739 | goto skip; | |
6cb69742 | 740 | /* !f->dst is a special case for bridge |
5e6d2435 JHS |
741 | * It means the MAC belongs to the bridge |
742 | * Therefore need a little more filtering | |
743 | * we only want to dump the !f->dst case | |
744 | */ | |
745 | if (f->dst) | |
746 | goto skip; | |
747 | } | |
6cb69742 HS |
748 | if (!filter_dev && f->dst) |
749 | goto skip; | |
5d5eacb3 | 750 | |
472681d5 MM |
751 | err = fdb_fill_info(skb, br, f, |
752 | NETLINK_CB(cb->skb).portid, | |
753 | cb->nlh->nlmsg_seq, | |
754 | RTM_NEWNEIGH, | |
755 | NLM_F_MULTI); | |
d297653d RP |
756 | if (err < 0) |
757 | goto out; | |
b078f0df | 758 | skip: |
d297653d | 759 | *idx += 1; |
b078f0df | 760 | } |
761 | } | |
b078f0df | 762 | |
77162022 | 763 | out: |
d297653d | 764 | return err; |
b078f0df | 765 | } |
36fd2b63 | 766 | |
292d1398 | 767 | /* Update (create or replace) forwarding database entry */ |
7bb90c37 TM |
768 | static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source, |
769 | const __u8 *addr, __u16 state, __u16 flags, __u16 vid) | |
36fd2b63 | 770 | { |
2ba071ec | 771 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; |
36fd2b63 | 772 | struct net_bridge_fdb_entry *fdb; |
b0a397fb | 773 | bool modified = false; |
36fd2b63 | 774 | |
eb8d7baa | 775 | /* If the port cannot learn allow only local and static entries */ |
7bb90c37 | 776 | if (source && !(state & NUD_PERMANENT) && !(state & NUD_NOARP) && |
eb8d7baa WK |
777 | !(source->state == BR_STATE_LEARNING || |
778 | source->state == BR_STATE_FORWARDING)) | |
779 | return -EPERM; | |
780 | ||
7bb90c37 TM |
781 | if (!source && !(state & NUD_PERMANENT)) { |
782 | pr_info("bridge: RTM_NEWNEIGH %s without NUD_PERMANENT\n", | |
783 | br->dev->name); | |
784 | return -EINVAL; | |
785 | } | |
786 | ||
2ba071ec | 787 | fdb = fdb_find(head, addr, vid); |
64af1bac | 788 | if (fdb == NULL) { |
789 | if (!(flags & NLM_F_CREATE)) | |
790 | return -ENOENT; | |
36fd2b63 | 791 | |
b7af1472 | 792 | fdb = fdb_create(head, source, addr, vid, 0, 0); |
64af1bac | 793 | if (!fdb) |
794 | return -ENOMEM; | |
b0a397fb | 795 | |
796 | modified = true; | |
64af1bac | 797 | } else { |
798 | if (flags & NLM_F_EXCL) | |
799 | return -EEXIST; | |
b0a397fb | 800 | |
801 | if (fdb->dst != source) { | |
802 | fdb->dst = source; | |
803 | modified = true; | |
804 | } | |
292d1398 | 805 | } |
806 | ||
3741873b | 807 | if (fdb_to_nud(br, fdb) != state) { |
145beee8 VY |
808 | if (state & NUD_PERMANENT) { |
809 | fdb->is_local = 1; | |
810 | if (!fdb->is_static) { | |
811 | fdb->is_static = 1; | |
020ec6ba | 812 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
813 | } |
814 | } else if (state & NUD_NOARP) { | |
815 | fdb->is_local = 0; | |
816 | if (!fdb->is_static) { | |
817 | fdb->is_static = 1; | |
020ec6ba | 818 | fdb_add_hw_addr(br, addr); |
145beee8 VY |
819 | } |
820 | } else { | |
292d1398 | 821 | fdb->is_local = 0; |
145beee8 VY |
822 | if (fdb->is_static) { |
823 | fdb->is_static = 0; | |
020ec6ba | 824 | fdb_del_hw_addr(br, addr); |
145beee8 VY |
825 | } |
826 | } | |
64af1bac | 827 | |
b0a397fb | 828 | modified = true; |
829 | } | |
a5642ab4 | 830 | fdb->added_by_user = 1; |
b0a397fb | 831 | |
832 | fdb->used = jiffies; | |
833 | if (modified) { | |
834 | fdb->updated = jiffies; | |
31e8a49c | 835 | fdb_notify(br, fdb, RTM_NEWNEIGH); |
64af1bac | 836 | } |
36fd2b63 | 837 | |
36fd2b63 | 838 | return 0; |
839 | } | |
840 | ||
7bb90c37 TM |
841 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br, |
842 | struct net_bridge_port *p, const unsigned char *addr, | |
843 | u16 nlh_flags, u16 vid) | |
1690be63 VY |
844 | { |
845 | int err = 0; | |
846 | ||
847 | if (ndm->ndm_flags & NTF_USE) { | |
7bb90c37 TM |
848 | if (!p) { |
849 | pr_info("bridge: RTM_NEWNEIGH %s with NTF_USE is not supported\n", | |
850 | br->dev->name); | |
851 | return -EINVAL; | |
852 | } | |
c4c832f8 | 853 | local_bh_disable(); |
1690be63 | 854 | rcu_read_lock(); |
7bb90c37 | 855 | br_fdb_update(br, p, addr, vid, true); |
1690be63 | 856 | rcu_read_unlock(); |
c4c832f8 | 857 | local_bh_enable(); |
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 | |
292d1398 | 879 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
880 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
881 | return -EINVAL; | |
882 | } | |
883 | ||
537f7f84 SH |
884 | if (is_zero_ether_addr(addr)) { |
885 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
886 | return -EINVAL; | |
887 | } | |
888 | ||
3741873b RP |
889 | if (dev->priv_flags & IFF_EBRIDGE) { |
890 | br = netdev_priv(dev); | |
891 | vg = br_vlan_group(br); | |
892 | } else { | |
893 | p = br_port_get_rtnl(dev); | |
894 | if (!p) { | |
895 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
896 | dev->name); | |
897 | return -EINVAL; | |
898 | } | |
7bb90c37 | 899 | br = p->br; |
3741873b | 900 | vg = nbp_vlan_group(p); |
36fd2b63 | 901 | } |
902 | ||
f6f6424b | 903 | if (vid) { |
2594e906 | 904 | v = br_vlan_find(vg, vid); |
3741873b RP |
905 | if (!v || !br_vlan_should_use(v)) { |
906 | pr_info("bridge: RTM_NEWNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); | |
1690be63 VY |
907 | return -EINVAL; |
908 | } | |
909 | ||
910 | /* VID was specified, so use it. */ | |
7bb90c37 | 911 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, vid); |
292d1398 | 912 | } else { |
7bb90c37 | 913 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, 0); |
2594e906 | 914 | if (err || !vg || !vg->num_vlans) |
1690be63 | 915 | goto out; |
1690be63 VY |
916 | |
917 | /* We have vlans configured on this port and user didn't | |
918 | * specify a VLAN. To be nice, add/update entry for every | |
919 | * vlan on this port. | |
920 | */ | |
2594e906 | 921 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
3741873b RP |
922 | if (!br_vlan_should_use(v)) |
923 | continue; | |
7bb90c37 | 924 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, v->vid); |
1690be63 VY |
925 | if (err) |
926 | goto out; | |
1690be63 | 927 | } |
292d1398 | 928 | } |
36fd2b63 | 929 | |
1690be63 | 930 | out: |
36fd2b63 | 931 | return err; |
932 | } | |
933 | ||
3741873b RP |
934 | static int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, |
935 | u16 vid) | |
936 | { | |
937 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)]; | |
938 | struct net_bridge_fdb_entry *fdb; | |
939 | ||
940 | fdb = fdb_find(head, addr, vid); | |
941 | if (!fdb) | |
942 | return -ENOENT; | |
943 | ||
944 | fdb_delete(br, fdb); | |
945 | return 0; | |
946 | } | |
947 | ||
948 | static int __br_fdb_delete_by_addr(struct net_bridge *br, | |
949 | const unsigned char *addr, u16 vid) | |
950 | { | |
951 | int err; | |
952 | ||
953 | spin_lock_bh(&br->hash_lock); | |
954 | err = fdb_delete_by_addr(br, addr, vid); | |
955 | spin_unlock_bh(&br->hash_lock); | |
956 | ||
957 | return err; | |
958 | } | |
959 | ||
8c86f967 NA |
960 | static int fdb_delete_by_addr_and_port(struct net_bridge_port *p, |
961 | const u8 *addr, u16 vlan) | |
36fd2b63 | 962 | { |
8c86f967 | 963 | struct net_bridge *br = p->br; |
1690be63 | 964 | struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)]; |
36fd2b63 | 965 | struct net_bridge_fdb_entry *fdb; |
966 | ||
1690be63 | 967 | fdb = fdb_find(head, addr, vlan); |
8c86f967 | 968 | if (!fdb || fdb->dst != p) |
36fd2b63 | 969 | return -ENOENT; |
970 | ||
1690be63 | 971 | fdb_delete(br, fdb); |
36fd2b63 | 972 | return 0; |
973 | } | |
974 | ||
1690be63 VY |
975 | static int __br_fdb_delete(struct net_bridge_port *p, |
976 | const unsigned char *addr, u16 vid) | |
977 | { | |
978 | int err; | |
979 | ||
980 | spin_lock_bh(&p->br->hash_lock); | |
8c86f967 | 981 | err = fdb_delete_by_addr_and_port(p, addr, vid); |
1690be63 VY |
982 | spin_unlock_bh(&p->br->hash_lock); |
983 | ||
984 | return err; | |
985 | } | |
986 | ||
36fd2b63 | 987 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
988 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
989 | struct net_device *dev, | |
f6f6424b | 990 | const unsigned char *addr, u16 vid) |
36fd2b63 | 991 | { |
2594e906 | 992 | struct net_bridge_vlan_group *vg; |
3741873b | 993 | struct net_bridge_port *p = NULL; |
2594e906 | 994 | struct net_bridge_vlan *v; |
3741873b | 995 | struct net_bridge *br = NULL; |
36fd2b63 | 996 | int err; |
1690be63 | 997 | |
3741873b RP |
998 | if (dev->priv_flags & IFF_EBRIDGE) { |
999 | br = netdev_priv(dev); | |
1000 | vg = br_vlan_group(br); | |
1001 | } else { | |
1002 | p = br_port_get_rtnl(dev); | |
1003 | if (!p) { | |
1004 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
1005 | dev->name); | |
1006 | return -EINVAL; | |
1007 | } | |
1008 | vg = nbp_vlan_group(p); | |
36fd2b63 | 1009 | } |
1010 | ||
f6f6424b | 1011 | if (vid) { |
2594e906 NA |
1012 | v = br_vlan_find(vg, vid); |
1013 | if (!v) { | |
3741873b | 1014 | pr_info("bridge: RTM_DELNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); |
1690be63 VY |
1015 | return -EINVAL; |
1016 | } | |
36fd2b63 | 1017 | |
3741873b RP |
1018 | if (dev->priv_flags & IFF_EBRIDGE) |
1019 | err = __br_fdb_delete_by_addr(br, addr, vid); | |
1020 | else | |
1021 | err = __br_fdb_delete(p, addr, vid); | |
1690be63 | 1022 | } else { |
25d3b493 | 1023 | err = -ENOENT; |
3741873b RP |
1024 | if (dev->priv_flags & IFF_EBRIDGE) |
1025 | err = __br_fdb_delete_by_addr(br, addr, 0); | |
1026 | else | |
1027 | err &= __br_fdb_delete(p, addr, 0); | |
1028 | ||
2594e906 | 1029 | if (!vg || !vg->num_vlans) |
1690be63 | 1030 | goto out; |
1690be63 | 1031 | |
3741873b RP |
1032 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
1033 | if (!br_vlan_should_use(v)) | |
1034 | continue; | |
1035 | if (dev->priv_flags & IFF_EBRIDGE) | |
1036 | err = __br_fdb_delete_by_addr(br, addr, v->vid); | |
1037 | else | |
1038 | err &= __br_fdb_delete(p, addr, v->vid); | |
1039 | } | |
1690be63 VY |
1040 | } |
1041 | out: | |
36fd2b63 | 1042 | return err; |
1043 | } | |
8db24af7 VY |
1044 | |
1045 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1046 | { | |
1047 | struct net_bridge_fdb_entry *fdb, *tmp; | |
1048 | int i; | |
1049 | int err; | |
1050 | ||
1051 | ASSERT_RTNL(); | |
1052 | ||
1053 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1054 | hlist_for_each_entry(fdb, &br->hash[i], hlist) { | |
1055 | /* We only care for static entries */ | |
1056 | if (!fdb->is_static) | |
1057 | continue; | |
1058 | ||
1059 | err = dev_uc_add(p->dev, fdb->addr.addr); | |
1060 | if (err) | |
1061 | goto rollback; | |
1062 | } | |
1063 | } | |
1064 | return 0; | |
1065 | ||
1066 | rollback: | |
1067 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1068 | hlist_for_each_entry(tmp, &br->hash[i], hlist) { | |
1069 | /* If we reached the fdb that failed, we can stop */ | |
1070 | if (tmp == fdb) | |
1071 | break; | |
1072 | ||
1073 | /* We only care for static entries */ | |
1074 | if (!tmp->is_static) | |
1075 | continue; | |
1076 | ||
1077 | dev_uc_del(p->dev, tmp->addr.addr); | |
1078 | } | |
1079 | } | |
1080 | return err; | |
1081 | } | |
1082 | ||
1083 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1084 | { | |
1085 | struct net_bridge_fdb_entry *fdb; | |
1086 | int i; | |
1087 | ||
1088 | ASSERT_RTNL(); | |
1089 | ||
1090 | for (i = 0; i < BR_HASH_SIZE; i++) { | |
1091 | hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) { | |
1092 | /* We only care for static entries */ | |
1093 | if (!fdb->is_static) | |
1094 | continue; | |
1095 | ||
1096 | dev_uc_del(p->dev, fdb->addr.addr); | |
1097 | } | |
1098 | } | |
1099 | } | |
cf6b8e1e | 1100 | |
3aeb6617 | 1101 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1102 | const unsigned char *addr, u16 vid) |
1103 | { | |
cf6b8e1e SF |
1104 | struct hlist_head *head; |
1105 | struct net_bridge_fdb_entry *fdb; | |
1106 | int err = 0; | |
1107 | ||
3aeb6617 | 1108 | ASSERT_RTNL(); |
cf6b8e1e SF |
1109 | spin_lock_bh(&br->hash_lock); |
1110 | ||
1111 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1112 | fdb = fdb_find(head, addr, vid); | |
1113 | if (!fdb) { | |
b7af1472 | 1114 | fdb = fdb_create(head, p, addr, vid, 0, 0); |
cf6b8e1e SF |
1115 | if (!fdb) { |
1116 | err = -ENOMEM; | |
1117 | goto err_unlock; | |
1118 | } | |
1119 | fdb->added_by_external_learn = 1; | |
1120 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1121 | } else if (fdb->added_by_external_learn) { | |
1122 | /* Refresh entry */ | |
1123 | fdb->updated = fdb->used = jiffies; | |
1124 | } else if (!fdb->added_by_user) { | |
1125 | /* Take over SW learned entry */ | |
1126 | fdb->added_by_external_learn = 1; | |
1127 | fdb->updated = jiffies; | |
1128 | fdb_notify(br, fdb, RTM_NEWNEIGH); | |
1129 | } | |
1130 | ||
1131 | err_unlock: | |
1132 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1133 | |
1134 | return err; | |
1135 | } | |
cf6b8e1e | 1136 | |
3aeb6617 | 1137 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
cf6b8e1e SF |
1138 | const unsigned char *addr, u16 vid) |
1139 | { | |
cf6b8e1e SF |
1140 | struct hlist_head *head; |
1141 | struct net_bridge_fdb_entry *fdb; | |
1142 | int err = 0; | |
1143 | ||
3aeb6617 | 1144 | ASSERT_RTNL(); |
cf6b8e1e SF |
1145 | spin_lock_bh(&br->hash_lock); |
1146 | ||
1147 | head = &br->hash[br_mac_hash(addr, vid)]; | |
1148 | fdb = fdb_find(head, addr, vid); | |
1149 | if (fdb && fdb->added_by_external_learn) | |
1150 | fdb_delete(br, fdb); | |
1151 | else | |
1152 | err = -ENOENT; | |
1153 | ||
1154 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1155 | |
1156 | return err; | |
1157 | } |