Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Forwarding database | |
4 | * Linux ethernet bridge | |
5 | * | |
6 | * Authors: | |
7 | * Lennert Buytenhek <buytenh@gnu.org> | |
1da177e4 LT |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/init.h> | |
82524746 | 12 | #include <linux/rculist.h> |
1da177e4 LT |
13 | #include <linux/spinlock.h> |
14 | #include <linux/times.h> | |
15 | #include <linux/netdevice.h> | |
16 | #include <linux/etherdevice.h> | |
17 | #include <linux/jhash.h> | |
3f890923 | 18 | #include <linux/random.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
60063497 | 20 | #include <linux/atomic.h> |
3f890923 | 21 | #include <asm/unaligned.h> |
2ba071ec | 22 | #include <linux/if_vlan.h> |
b4ad7baa | 23 | #include <net/switchdev.h> |
b74fd306 | 24 | #include <trace/events/bridge.h> |
1da177e4 LT |
25 | #include "br_private.h" |
26 | ||
eb793583 NA |
27 | static const struct rhashtable_params br_fdb_rht_params = { |
28 | .head_offset = offsetof(struct net_bridge_fdb_entry, rhnode), | |
29 | .key_offset = offsetof(struct net_bridge_fdb_entry, key), | |
30 | .key_len = sizeof(struct net_bridge_fdb_key), | |
31 | .automatic_shrinking = true, | |
eb793583 NA |
32 | }; |
33 | ||
e18b890b | 34 | static struct kmem_cache *br_fdb_cache __read_mostly; |
1da177e4 | 35 | |
87a596e0 | 36 | int __init br_fdb_init(void) |
1da177e4 LT |
37 | { |
38 | br_fdb_cache = kmem_cache_create("bridge_fdb_cache", | |
39 | sizeof(struct net_bridge_fdb_entry), | |
40 | 0, | |
20c2df83 | 41 | SLAB_HWCACHE_ALIGN, NULL); |
87a596e0 AM |
42 | if (!br_fdb_cache) |
43 | return -ENOMEM; | |
44 | ||
87a596e0 | 45 | return 0; |
1da177e4 LT |
46 | } |
47 | ||
73afc906 | 48 | void br_fdb_fini(void) |
1da177e4 LT |
49 | { |
50 | kmem_cache_destroy(br_fdb_cache); | |
51 | } | |
52 | ||
eb793583 NA |
53 | int br_fdb_hash_init(struct net_bridge *br) |
54 | { | |
55 | return rhashtable_init(&br->fdb_hash_tbl, &br_fdb_rht_params); | |
56 | } | |
57 | ||
58 | void br_fdb_hash_fini(struct net_bridge *br) | |
59 | { | |
60 | rhashtable_destroy(&br->fdb_hash_tbl); | |
61 | } | |
1da177e4 LT |
62 | |
63 | /* if topology_changing then use forward_delay (default 15 sec) | |
64 | * otherwise keep longer (default 5 minutes) | |
65 | */ | |
3f890923 | 66 | static inline unsigned long hold_time(const struct net_bridge *br) |
1da177e4 LT |
67 | { |
68 | return br->topology_change ? br->forward_delay : br->ageing_time; | |
69 | } | |
70 | ||
3f890923 | 71 | static inline int has_expired(const struct net_bridge *br, |
1da177e4 LT |
72 | const struct net_bridge_fdb_entry *fdb) |
73 | { | |
29e63fff | 74 | return !test_bit(BR_FDB_STATIC, &fdb->flags) && |
b5cd9f7c | 75 | !test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags) && |
29e63fff | 76 | time_before_eq(fdb->updated + hold_time(br), jiffies); |
1da177e4 LT |
77 | } |
78 | ||
da678292 MM |
79 | static void fdb_rcu_free(struct rcu_head *head) |
80 | { | |
81 | struct net_bridge_fdb_entry *ent | |
82 | = container_of(head, struct net_bridge_fdb_entry, rcu); | |
83 | kmem_cache_free(br_fdb_cache, ent); | |
84 | } | |
85 | ||
4682048a VO |
86 | static int fdb_to_nud(const struct net_bridge *br, |
87 | const struct net_bridge_fdb_entry *fdb) | |
88 | { | |
89 | if (test_bit(BR_FDB_LOCAL, &fdb->flags)) | |
90 | return NUD_PERMANENT; | |
91 | else if (test_bit(BR_FDB_STATIC, &fdb->flags)) | |
92 | return NUD_NOARP; | |
93 | else if (has_expired(br, fdb)) | |
94 | return NUD_STALE; | |
95 | else | |
96 | return NUD_REACHABLE; | |
97 | } | |
98 | ||
99 | static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br, | |
100 | const struct net_bridge_fdb_entry *fdb, | |
101 | u32 portid, u32 seq, int type, unsigned int flags) | |
102 | { | |
103 | const struct net_bridge_port *dst = READ_ONCE(fdb->dst); | |
104 | unsigned long now = jiffies; | |
105 | struct nda_cacheinfo ci; | |
106 | struct nlmsghdr *nlh; | |
107 | struct ndmsg *ndm; | |
a35ec8e3 | 108 | u32 ext_flags = 0; |
4682048a VO |
109 | |
110 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags); | |
111 | if (nlh == NULL) | |
112 | return -EMSGSIZE; | |
113 | ||
114 | ndm = nlmsg_data(nlh); | |
115 | ndm->ndm_family = AF_BRIDGE; | |
116 | ndm->ndm_pad1 = 0; | |
117 | ndm->ndm_pad2 = 0; | |
118 | ndm->ndm_flags = 0; | |
119 | ndm->ndm_type = 0; | |
120 | ndm->ndm_ifindex = dst ? dst->dev->ifindex : br->dev->ifindex; | |
121 | ndm->ndm_state = fdb_to_nud(br, fdb); | |
122 | ||
123 | if (test_bit(BR_FDB_OFFLOADED, &fdb->flags)) | |
124 | ndm->ndm_flags |= NTF_OFFLOADED; | |
125 | if (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags)) | |
126 | ndm->ndm_flags |= NTF_EXT_LEARNED; | |
127 | if (test_bit(BR_FDB_STICKY, &fdb->flags)) | |
128 | ndm->ndm_flags |= NTF_STICKY; | |
a35ec8e3 HS |
129 | if (test_bit(BR_FDB_LOCKED, &fdb->flags)) |
130 | ext_flags |= NTF_EXT_LOCKED; | |
4682048a VO |
131 | |
132 | if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->key.addr)) | |
133 | goto nla_put_failure; | |
134 | if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex)) | |
135 | goto nla_put_failure; | |
a35ec8e3 HS |
136 | if (nla_put_u32(skb, NDA_FLAGS_EXT, ext_flags)) |
137 | goto nla_put_failure; | |
138 | ||
4682048a VO |
139 | ci.ndm_used = jiffies_to_clock_t(now - fdb->used); |
140 | ci.ndm_confirmed = 0; | |
141 | ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated); | |
142 | ci.ndm_refcnt = 0; | |
143 | if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci)) | |
144 | goto nla_put_failure; | |
145 | ||
146 | if (fdb->key.vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), | |
147 | &fdb->key.vlan_id)) | |
148 | goto nla_put_failure; | |
149 | ||
150 | if (test_bit(BR_FDB_NOTIFY, &fdb->flags)) { | |
151 | struct nlattr *nest = nla_nest_start(skb, NDA_FDB_EXT_ATTRS); | |
152 | u8 notify_bits = FDB_NOTIFY_BIT; | |
153 | ||
154 | if (!nest) | |
155 | goto nla_put_failure; | |
156 | if (test_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags)) | |
157 | notify_bits |= FDB_NOTIFY_INACTIVE_BIT; | |
158 | ||
159 | if (nla_put_u8(skb, NFEA_ACTIVITY_NOTIFY, notify_bits)) { | |
160 | nla_nest_cancel(skb, nest); | |
161 | goto nla_put_failure; | |
162 | } | |
163 | ||
164 | nla_nest_end(skb, nest); | |
165 | } | |
166 | ||
167 | nlmsg_end(skb, nlh); | |
168 | return 0; | |
169 | ||
170 | nla_put_failure: | |
171 | nlmsg_cancel(skb, nlh); | |
172 | return -EMSGSIZE; | |
173 | } | |
174 | ||
175 | static inline size_t fdb_nlmsg_size(void) | |
176 | { | |
177 | return NLMSG_ALIGN(sizeof(struct ndmsg)) | |
178 | + nla_total_size(ETH_ALEN) /* NDA_LLADDR */ | |
179 | + nla_total_size(sizeof(u32)) /* NDA_MASTER */ | |
a35ec8e3 | 180 | + nla_total_size(sizeof(u32)) /* NDA_FLAGS_EXT */ |
4682048a VO |
181 | + nla_total_size(sizeof(u16)) /* NDA_VLAN */ |
182 | + nla_total_size(sizeof(struct nda_cacheinfo)) | |
183 | + nla_total_size(0) /* NDA_FDB_EXT_ATTRS */ | |
184 | + nla_total_size(sizeof(u8)); /* NFEA_ACTIVITY_NOTIFY */ | |
185 | } | |
186 | ||
187 | static void fdb_notify(struct net_bridge *br, | |
188 | const struct net_bridge_fdb_entry *fdb, int type, | |
189 | bool swdev_notify) | |
190 | { | |
191 | struct net *net = dev_net(br->dev); | |
192 | struct sk_buff *skb; | |
193 | int err = -ENOBUFS; | |
194 | ||
195 | if (swdev_notify) | |
196 | br_switchdev_fdb_notify(br, fdb, type); | |
197 | ||
198 | skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC); | |
199 | if (skb == NULL) | |
200 | goto errout; | |
201 | ||
202 | err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0); | |
203 | if (err < 0) { | |
204 | /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */ | |
205 | WARN_ON(err == -EMSGSIZE); | |
206 | kfree_skb(skb); | |
207 | goto errout; | |
208 | } | |
209 | rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); | |
210 | return; | |
211 | errout: | |
212 | rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); | |
213 | } | |
214 | ||
eb793583 | 215 | static struct net_bridge_fdb_entry *fdb_find_rcu(struct rhashtable *tbl, |
bfd0aeac NA |
216 | const unsigned char *addr, |
217 | __u16 vid) | |
218 | { | |
eb793583 | 219 | struct net_bridge_fdb_key key; |
bfd0aeac | 220 | |
410b3d48 NA |
221 | WARN_ON_ONCE(!rcu_read_lock_held()); |
222 | ||
eb793583 NA |
223 | key.vlan_id = vid; |
224 | memcpy(key.addr.addr, addr, sizeof(key.addr.addr)); | |
bfd0aeac | 225 | |
eb793583 | 226 | return rhashtable_lookup(tbl, &key, br_fdb_rht_params); |
bfd0aeac NA |
227 | } |
228 | ||
229 | /* requires bridge hash_lock */ | |
230 | static struct net_bridge_fdb_entry *br_fdb_find(struct net_bridge *br, | |
231 | const unsigned char *addr, | |
232 | __u16 vid) | |
233 | { | |
bfd0aeac NA |
234 | struct net_bridge_fdb_entry *fdb; |
235 | ||
d12c9176 | 236 | lockdep_assert_held_once(&br->hash_lock); |
410b3d48 | 237 | |
bfd0aeac | 238 | rcu_read_lock(); |
eb793583 | 239 | fdb = fdb_find_rcu(&br->fdb_hash_tbl, addr, vid); |
bfd0aeac NA |
240 | rcu_read_unlock(); |
241 | ||
242 | return fdb; | |
243 | } | |
244 | ||
4d4fd361 PM |
245 | struct net_device *br_fdb_find_port(const struct net_device *br_dev, |
246 | const unsigned char *addr, | |
247 | __u16 vid) | |
248 | { | |
249 | struct net_bridge_fdb_entry *f; | |
250 | struct net_device *dev = NULL; | |
251 | struct net_bridge *br; | |
252 | ||
253 | ASSERT_RTNL(); | |
254 | ||
255 | if (!netif_is_bridge_master(br_dev)) | |
256 | return NULL; | |
257 | ||
258 | br = netdev_priv(br_dev); | |
873aca2e PM |
259 | rcu_read_lock(); |
260 | f = br_fdb_find_rcu(br, addr, vid); | |
4d4fd361 PM |
261 | if (f && f->dst) |
262 | dev = f->dst->dev; | |
873aca2e | 263 | rcu_read_unlock(); |
4d4fd361 PM |
264 | |
265 | return dev; | |
266 | } | |
267 | EXPORT_SYMBOL_GPL(br_fdb_find_port); | |
268 | ||
bfd0aeac NA |
269 | struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br, |
270 | const unsigned char *addr, | |
271 | __u16 vid) | |
272 | { | |
eb793583 | 273 | return fdb_find_rcu(&br->fdb_hash_tbl, addr, vid); |
bfd0aeac NA |
274 | } |
275 | ||
145beee8 VY |
276 | /* When a static FDB entry is added, the mac address from the entry is |
277 | * added to the bridge private HW address list and all required ports | |
278 | * are then updated with the new information. | |
279 | * Called under RTNL. | |
280 | */ | |
020ec6ba | 281 | static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
282 | { |
283 | int err; | |
a3f5ee71 | 284 | struct net_bridge_port *p; |
145beee8 VY |
285 | |
286 | ASSERT_RTNL(); | |
287 | ||
288 | list_for_each_entry(p, &br->port_list, list) { | |
289 | if (!br_promisc_port(p)) { | |
290 | err = dev_uc_add(p->dev, addr); | |
291 | if (err) | |
292 | goto undo; | |
293 | } | |
294 | } | |
295 | ||
296 | return; | |
297 | undo: | |
a3f5ee71 LR |
298 | list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
299 | if (!br_promisc_port(p)) | |
300 | dev_uc_del(p->dev, addr); | |
145beee8 VY |
301 | } |
302 | } | |
303 | ||
304 | /* When a static FDB entry is deleted, the HW address from that entry is | |
305 | * also removed from the bridge private HW address list and updates all | |
306 | * the ports with needed information. | |
307 | * Called under RTNL. | |
308 | */ | |
020ec6ba | 309 | static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr) |
145beee8 VY |
310 | { |
311 | struct net_bridge_port *p; | |
312 | ||
313 | ASSERT_RTNL(); | |
314 | ||
315 | list_for_each_entry(p, &br->port_list, list) { | |
316 | if (!br_promisc_port(p)) | |
317 | dev_uc_del(p->dev, addr); | |
318 | } | |
319 | } | |
320 | ||
161d82de PM |
321 | static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f, |
322 | bool swdev_notify) | |
1da177e4 | 323 | { |
b74fd306 RP |
324 | trace_fdb_delete(br, f); |
325 | ||
29e63fff | 326 | if (test_bit(BR_FDB_STATIC, &f->flags)) |
eb793583 | 327 | fdb_del_hw_addr(br, f->key.addr.addr); |
145beee8 | 328 | |
eb793583 NA |
329 | hlist_del_init_rcu(&f->fdb_node); |
330 | rhashtable_remove_fast(&br->fdb_hash_tbl, &f->rhnode, | |
331 | br_fdb_rht_params); | |
161d82de | 332 | fdb_notify(br, f, RTM_DELNEIGH, swdev_notify); |
da678292 | 333 | call_rcu(&f->rcu, fdb_rcu_free); |
1da177e4 LT |
334 | } |
335 | ||
960b589f TM |
336 | /* Delete a local entry if no other port had the same address. */ |
337 | static void fdb_delete_local(struct net_bridge *br, | |
338 | const struct net_bridge_port *p, | |
339 | struct net_bridge_fdb_entry *f) | |
340 | { | |
eb793583 | 341 | const unsigned char *addr = f->key.addr.addr; |
2594e906 NA |
342 | struct net_bridge_vlan_group *vg; |
343 | const struct net_bridge_vlan *v; | |
960b589f | 344 | struct net_bridge_port *op; |
eb793583 | 345 | u16 vid = f->key.vlan_id; |
960b589f TM |
346 | |
347 | /* Maybe another port has same hw addr? */ | |
348 | list_for_each_entry(op, &br->port_list, list) { | |
2594e906 | 349 | vg = nbp_vlan_group(op); |
960b589f | 350 | if (op != p && ether_addr_equal(op->dev->dev_addr, addr) && |
2594e906 | 351 | (!vid || br_vlan_find(vg, vid))) { |
960b589f | 352 | f->dst = op; |
ac3ca6af | 353 | clear_bit(BR_FDB_ADDED_BY_USER, &f->flags); |
960b589f TM |
354 | return; |
355 | } | |
356 | } | |
357 | ||
2594e906 NA |
358 | vg = br_vlan_group(br); |
359 | v = br_vlan_find(vg, vid); | |
960b589f TM |
360 | /* Maybe bridge device has same hw addr? */ |
361 | if (p && ether_addr_equal(br->dev->dev_addr, addr) && | |
2594e906 | 362 | (!vid || (v && br_vlan_should_use(v)))) { |
960b589f | 363 | f->dst = NULL; |
ac3ca6af | 364 | clear_bit(BR_FDB_ADDED_BY_USER, &f->flags); |
960b589f TM |
365 | return; |
366 | } | |
367 | ||
161d82de | 368 | fdb_delete(br, f, true); |
960b589f TM |
369 | } |
370 | ||
424bb9c9 TM |
371 | void br_fdb_find_delete_local(struct net_bridge *br, |
372 | const struct net_bridge_port *p, | |
373 | const unsigned char *addr, u16 vid) | |
374 | { | |
424bb9c9 TM |
375 | struct net_bridge_fdb_entry *f; |
376 | ||
377 | spin_lock_bh(&br->hash_lock); | |
bfd0aeac | 378 | f = br_fdb_find(br, addr, vid); |
6869c3b0 | 379 | if (f && test_bit(BR_FDB_LOCAL, &f->flags) && |
ac3ca6af | 380 | !test_bit(BR_FDB_ADDED_BY_USER, &f->flags) && f->dst == p) |
424bb9c9 TM |
381 | fdb_delete_local(br, p, f); |
382 | spin_unlock_bh(&br->hash_lock); | |
383 | } | |
384 | ||
5f94a5e2 VO |
385 | static struct net_bridge_fdb_entry *fdb_create(struct net_bridge *br, |
386 | struct net_bridge_port *source, | |
387 | const unsigned char *addr, | |
388 | __u16 vid, | |
389 | unsigned long flags) | |
390 | { | |
391 | struct net_bridge_fdb_entry *fdb; | |
9574fb55 | 392 | int err; |
5f94a5e2 VO |
393 | |
394 | fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC); | |
9574fb55 VO |
395 | if (!fdb) |
396 | return NULL; | |
397 | ||
398 | memcpy(fdb->key.addr.addr, addr, ETH_ALEN); | |
399 | WRITE_ONCE(fdb->dst, source); | |
400 | fdb->key.vlan_id = vid; | |
401 | fdb->flags = flags; | |
402 | fdb->updated = fdb->used = jiffies; | |
403 | err = rhashtable_lookup_insert_fast(&br->fdb_hash_tbl, &fdb->rhnode, | |
404 | br_fdb_rht_params); | |
405 | if (err) { | |
406 | kmem_cache_free(br_fdb_cache, fdb); | |
407 | return NULL; | |
5f94a5e2 | 408 | } |
9574fb55 VO |
409 | |
410 | hlist_add_head_rcu(&fdb->fdb_node, &br->fdb_list); | |
411 | ||
5f94a5e2 VO |
412 | return fdb; |
413 | } | |
414 | ||
4731b6d6 VO |
415 | static int fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, |
416 | const unsigned char *addr, u16 vid) | |
5f94a5e2 VO |
417 | { |
418 | struct net_bridge_fdb_entry *fdb; | |
419 | ||
420 | if (!is_valid_ether_addr(addr)) | |
421 | return -EINVAL; | |
422 | ||
423 | fdb = br_fdb_find(br, addr, vid); | |
424 | if (fdb) { | |
425 | /* it is okay to have multiple ports with same | |
426 | * address, just use the first one. | |
427 | */ | |
428 | if (test_bit(BR_FDB_LOCAL, &fdb->flags)) | |
429 | return 0; | |
430 | br_warn(br, "adding interface %s with same address as a received packet (addr:%pM, vlan:%u)\n", | |
431 | source ? source->dev->name : br->dev->name, addr, vid); | |
432 | fdb_delete(br, fdb, true); | |
433 | } | |
434 | ||
435 | fdb = fdb_create(br, source, addr, vid, | |
436 | BIT(BR_FDB_LOCAL) | BIT(BR_FDB_STATIC)); | |
437 | if (!fdb) | |
438 | return -ENOMEM; | |
439 | ||
440 | fdb_add_hw_addr(br, addr); | |
441 | fdb_notify(br, fdb, RTM_NEWNEIGH, true); | |
442 | return 0; | |
443 | } | |
444 | ||
1da177e4 LT |
445 | void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr) |
446 | { | |
2594e906 | 447 | struct net_bridge_vlan_group *vg; |
eb793583 | 448 | struct net_bridge_fdb_entry *f; |
1da177e4 | 449 | struct net_bridge *br = p->br; |
2594e906 | 450 | struct net_bridge_vlan *v; |
9d6f229f | 451 | |
1da177e4 | 452 | spin_lock_bh(&br->hash_lock); |
2594e906 | 453 | vg = nbp_vlan_group(p); |
eb793583 | 454 | hlist_for_each_entry(f, &br->fdb_list, fdb_node) { |
6869c3b0 | 455 | if (f->dst == p && test_bit(BR_FDB_LOCAL, &f->flags) && |
ac3ca6af | 456 | !test_bit(BR_FDB_ADDED_BY_USER, &f->flags)) { |
eb793583 NA |
457 | /* delete old one */ |
458 | fdb_delete_local(br, p, f); | |
459 | ||
460 | /* if this port has no vlan information | |
461 | * configured, we can safely be done at | |
462 | * this point. | |
463 | */ | |
464 | if (!vg || !vg->num_vlans) | |
465 | goto insert; | |
1da177e4 LT |
466 | } |
467 | } | |
1da177e4 | 468 | |
2836882f TM |
469 | insert: |
470 | /* insert new address, may fail if invalid address or dup. */ | |
4731b6d6 | 471 | fdb_add_local(br, p, newaddr, 0); |
2836882f | 472 | |
2594e906 | 473 | if (!vg || !vg->num_vlans) |
2836882f TM |
474 | goto done; |
475 | ||
476 | /* Now add entries for every VLAN configured on the port. | |
477 | * This function runs under RTNL so the bitmap will not change | |
478 | * from under us. | |
479 | */ | |
2594e906 | 480 | list_for_each_entry(v, &vg->vlan_list, vlist) |
4731b6d6 | 481 | fdb_add_local(br, p, newaddr, v->vid); |
2836882f | 482 | |
bc9a25d2 | 483 | done: |
1da177e4 LT |
484 | spin_unlock_bh(&br->hash_lock); |
485 | } | |
486 | ||
43598813 | 487 | void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr) |
488 | { | |
2594e906 | 489 | struct net_bridge_vlan_group *vg; |
43598813 | 490 | struct net_bridge_fdb_entry *f; |
2594e906 | 491 | struct net_bridge_vlan *v; |
43598813 | 492 | |
ac4c8868 TM |
493 | spin_lock_bh(&br->hash_lock); |
494 | ||
43598813 | 495 | /* If old entry was unassociated with any port, then delete it. */ |
bfd0aeac | 496 | f = br_fdb_find(br, br->dev->dev_addr, 0); |
6869c3b0 | 497 | if (f && test_bit(BR_FDB_LOCAL, &f->flags) && |
ac3ca6af | 498 | !f->dst && !test_bit(BR_FDB_ADDED_BY_USER, &f->flags)) |
960b589f | 499 | fdb_delete_local(br, NULL, f); |
43598813 | 500 | |
4731b6d6 | 501 | fdb_add_local(br, NULL, newaddr, 0); |
2594e906 NA |
502 | vg = br_vlan_group(br); |
503 | if (!vg || !vg->num_vlans) | |
504 | goto out; | |
bc9a25d2 VY |
505 | /* Now remove and add entries for every VLAN configured on the |
506 | * bridge. This function runs under RTNL so the bitmap will not | |
507 | * change from under us. | |
508 | */ | |
2594e906 | 509 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
0b148def TM |
510 | if (!br_vlan_should_use(v)) |
511 | continue; | |
bfd0aeac | 512 | f = br_fdb_find(br, br->dev->dev_addr, v->vid); |
6869c3b0 | 513 | if (f && test_bit(BR_FDB_LOCAL, &f->flags) && |
ac3ca6af | 514 | !f->dst && !test_bit(BR_FDB_ADDED_BY_USER, &f->flags)) |
960b589f | 515 | fdb_delete_local(br, NULL, f); |
4731b6d6 | 516 | fdb_add_local(br, NULL, newaddr, v->vid); |
bc9a25d2 | 517 | } |
ac4c8868 TM |
518 | out: |
519 | spin_unlock_bh(&br->hash_lock); | |
43598813 | 520 | } |
521 | ||
f7cdee8a | 522 | void br_fdb_cleanup(struct work_struct *work) |
1da177e4 | 523 | { |
f7cdee8a NA |
524 | struct net_bridge *br = container_of(work, struct net_bridge, |
525 | gc_work.work); | |
eb793583 | 526 | struct net_bridge_fdb_entry *f = NULL; |
1da177e4 | 527 | unsigned long delay = hold_time(br); |
f7cdee8a NA |
528 | unsigned long work_delay = delay; |
529 | unsigned long now = jiffies; | |
1da177e4 | 530 | |
eb793583 NA |
531 | /* this part is tricky, in order to avoid blocking learning and |
532 | * consequently forwarding, we rely on rcu to delete objects with | |
533 | * delayed freeing allowing us to continue traversing | |
534 | */ | |
535 | rcu_read_lock(); | |
536 | hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) { | |
31cbc39b | 537 | unsigned long this_timer = f->updated + delay; |
1da177e4 | 538 | |
29e63fff | 539 | if (test_bit(BR_FDB_STATIC, &f->flags) || |
31cbc39b NA |
540 | test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &f->flags)) { |
541 | if (test_bit(BR_FDB_NOTIFY, &f->flags)) { | |
542 | if (time_after(this_timer, now)) | |
543 | work_delay = min(work_delay, | |
544 | this_timer - now); | |
545 | else if (!test_and_set_bit(BR_FDB_NOTIFY_INACTIVE, | |
546 | &f->flags)) | |
547 | fdb_notify(br, f, RTM_NEWNEIGH, false); | |
548 | } | |
f7cdee8a | 549 | continue; |
31cbc39b NA |
550 | } |
551 | ||
eb793583 NA |
552 | if (time_after(this_timer, now)) { |
553 | work_delay = min(work_delay, this_timer - now); | |
554 | } else { | |
555 | spin_lock_bh(&br->hash_lock); | |
556 | if (!hlist_unhashed(&f->fdb_node)) | |
161d82de | 557 | fdb_delete(br, f, true); |
eb793583 | 558 | spin_unlock_bh(&br->hash_lock); |
1da177e4 LT |
559 | } |
560 | } | |
eb793583 | 561 | rcu_read_unlock(); |
1da177e4 | 562 | |
f7cdee8a NA |
563 | /* Cleanup minimum 10 milliseconds apart */ |
564 | work_delay = max_t(unsigned long, work_delay, msecs_to_jiffies(10)); | |
565 | mod_delayed_work(system_long_wq, &br->gc_work, work_delay); | |
1da177e4 LT |
566 | } |
567 | ||
1f78ee14 NA |
568 | static bool __fdb_flush_matches(const struct net_bridge *br, |
569 | const struct net_bridge_fdb_entry *f, | |
570 | const struct net_bridge_fdb_flush_desc *desc) | |
571 | { | |
572 | const struct net_bridge_port *dst = READ_ONCE(f->dst); | |
573 | int port_ifidx = dst ? dst->dev->ifindex : br->dev->ifindex; | |
574 | ||
575 | if (desc->vlan_id && desc->vlan_id != f->key.vlan_id) | |
576 | return false; | |
577 | if (desc->port_ifindex && desc->port_ifindex != port_ifidx) | |
578 | return false; | |
579 | if (desc->flags_mask && (f->flags & desc->flags_mask) != desc->flags) | |
580 | return false; | |
581 | ||
582 | return true; | |
583 | } | |
584 | ||
585 | /* Flush forwarding database entries matching the description */ | |
586 | void br_fdb_flush(struct net_bridge *br, | |
587 | const struct net_bridge_fdb_flush_desc *desc) | |
9cf63747 | 588 | { |
eb793583 | 589 | struct net_bridge_fdb_entry *f; |
9cf63747 | 590 | |
1f78ee14 NA |
591 | rcu_read_lock(); |
592 | hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) { | |
593 | if (!__fdb_flush_matches(br, f, desc)) | |
594 | continue; | |
595 | ||
596 | spin_lock_bh(&br->hash_lock); | |
597 | if (!hlist_unhashed(&f->fdb_node)) | |
161d82de | 598 | fdb_delete(br, f, true); |
1f78ee14 | 599 | spin_unlock_bh(&br->hash_lock); |
9cf63747 | 600 | } |
1f78ee14 | 601 | rcu_read_unlock(); |
9cf63747 | 602 | } |
1a620698 | 603 | |
564445fb NA |
604 | static unsigned long __ndm_state_to_fdb_flags(u16 ndm_state) |
605 | { | |
606 | unsigned long flags = 0; | |
607 | ||
608 | if (ndm_state & NUD_PERMANENT) | |
609 | __set_bit(BR_FDB_LOCAL, &flags); | |
610 | if (ndm_state & NUD_NOARP) | |
611 | __set_bit(BR_FDB_STATIC, &flags); | |
612 | ||
613 | return flags; | |
614 | } | |
615 | ||
616 | static unsigned long __ndm_flags_to_fdb_flags(u8 ndm_flags) | |
617 | { | |
618 | unsigned long flags = 0; | |
619 | ||
620 | if (ndm_flags & NTF_USE) | |
621 | __set_bit(BR_FDB_ADDED_BY_USER, &flags); | |
622 | if (ndm_flags & NTF_EXT_LEARNED) | |
623 | __set_bit(BR_FDB_ADDED_BY_EXT_LEARN, &flags); | |
624 | if (ndm_flags & NTF_OFFLOADED) | |
625 | __set_bit(BR_FDB_OFFLOADED, &flags); | |
626 | if (ndm_flags & NTF_STICKY) | |
627 | __set_bit(BR_FDB_STICKY, &flags); | |
628 | ||
629 | return flags; | |
630 | } | |
631 | ||
0dbe886a NA |
632 | static int __fdb_flush_validate_ifindex(const struct net_bridge *br, |
633 | int ifindex, | |
634 | struct netlink_ext_ack *extack) | |
635 | { | |
636 | const struct net_device *dev; | |
637 | ||
638 | dev = __dev_get_by_index(dev_net(br->dev), ifindex); | |
639 | if (!dev) { | |
640 | NL_SET_ERR_MSG_MOD(extack, "Unknown flush device ifindex"); | |
641 | return -ENODEV; | |
642 | } | |
643 | if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { | |
644 | NL_SET_ERR_MSG_MOD(extack, "Flush device is not a bridge or bridge port"); | |
645 | return -EINVAL; | |
646 | } | |
647 | if (netif_is_bridge_master(dev) && dev != br->dev) { | |
648 | NL_SET_ERR_MSG_MOD(extack, | |
649 | "Flush bridge device does not match target bridge device"); | |
650 | return -EINVAL; | |
651 | } | |
652 | if (netif_is_bridge_port(dev)) { | |
653 | struct net_bridge_port *p = br_port_get_rtnl(dev); | |
654 | ||
655 | if (p->br != br) { | |
656 | NL_SET_ERR_MSG_MOD(extack, "Port belongs to a different bridge device"); | |
657 | return -EINVAL; | |
658 | } | |
659 | } | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
edaef191 NA |
664 | int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[], |
665 | struct net_device *dev, u16 vid, | |
666 | struct netlink_ext_ack *extack) | |
667 | { | |
564445fb | 668 | u8 ndm_flags = ndm->ndm_flags & ~FDB_FLUSH_IGNORED_NDM_FLAGS; |
0dbe886a | 669 | struct net_bridge_fdb_flush_desc desc = { .vlan_id = vid }; |
edaef191 NA |
670 | struct net_bridge_port *p = NULL; |
671 | struct net_bridge *br; | |
672 | ||
673 | if (netif_is_bridge_master(dev)) { | |
674 | br = netdev_priv(dev); | |
675 | } else { | |
676 | p = br_port_get_rtnl(dev); | |
677 | if (!p) { | |
678 | NL_SET_ERR_MSG_MOD(extack, "Device is not a bridge port"); | |
679 | return -EINVAL; | |
680 | } | |
681 | br = p->br; | |
682 | } | |
683 | ||
564445fb NA |
684 | if (ndm_flags & ~FDB_FLUSH_ALLOWED_NDM_FLAGS) { |
685 | NL_SET_ERR_MSG(extack, "Unsupported fdb flush ndm flag bits set"); | |
686 | return -EINVAL; | |
687 | } | |
688 | if (ndm->ndm_state & ~FDB_FLUSH_ALLOWED_NDM_STATES) { | |
689 | NL_SET_ERR_MSG(extack, "Unsupported fdb flush ndm state bits set"); | |
690 | return -EINVAL; | |
691 | } | |
692 | ||
693 | desc.flags |= __ndm_state_to_fdb_flags(ndm->ndm_state); | |
694 | desc.flags |= __ndm_flags_to_fdb_flags(ndm_flags); | |
695 | if (tb[NDA_NDM_STATE_MASK]) { | |
696 | u16 ndm_state_mask = nla_get_u16(tb[NDA_NDM_STATE_MASK]); | |
697 | ||
698 | desc.flags_mask |= __ndm_state_to_fdb_flags(ndm_state_mask); | |
699 | } | |
700 | if (tb[NDA_NDM_FLAGS_MASK]) { | |
701 | u8 ndm_flags_mask = nla_get_u8(tb[NDA_NDM_FLAGS_MASK]); | |
702 | ||
703 | desc.flags_mask |= __ndm_flags_to_fdb_flags(ndm_flags_mask); | |
704 | } | |
0dbe886a NA |
705 | if (tb[NDA_IFINDEX]) { |
706 | int err, ifidx = nla_get_s32(tb[NDA_IFINDEX]); | |
707 | ||
708 | err = __fdb_flush_validate_ifindex(br, ifidx, extack); | |
709 | if (err) | |
710 | return err; | |
711 | desc.port_ifindex = ifidx; | |
712 | } else if (p) { | |
713 | /* flush was invoked with port device and NTF_MASTER */ | |
714 | desc.port_ifindex = p->dev->ifindex; | |
715 | } | |
564445fb NA |
716 | |
717 | br_debug(br, "flushing port ifindex: %d vlan id: %u flags: 0x%lx flags mask: 0x%lx\n", | |
718 | desc.port_ifindex, desc.vlan_id, desc.flags, desc.flags_mask); | |
719 | ||
1f78ee14 | 720 | br_fdb_flush(br, &desc); |
edaef191 NA |
721 | |
722 | return 0; | |
723 | } | |
724 | ||
25985edc | 725 | /* Flush all entries referring to a specific port. |
9cf63747 | 726 | * if do_all is set also flush static entries |
1ea2d020 | 727 | * if vid is set delete all entries that match the vlan_id |
9cf63747 | 728 | */ |
1a620698 SH |
729 | void br_fdb_delete_by_port(struct net_bridge *br, |
730 | const struct net_bridge_port *p, | |
1ea2d020 | 731 | u16 vid, |
1a620698 | 732 | int do_all) |
1da177e4 | 733 | { |
eb793583 NA |
734 | struct net_bridge_fdb_entry *f; |
735 | struct hlist_node *tmp; | |
1da177e4 LT |
736 | |
737 | spin_lock_bh(&br->hash_lock); | |
eb793583 NA |
738 | hlist_for_each_entry_safe(f, tmp, &br->fdb_list, fdb_node) { |
739 | if (f->dst != p) | |
740 | continue; | |
9d6f229f | 741 | |
eb793583 | 742 | if (!do_all) |
29e63fff | 743 | if (test_bit(BR_FDB_STATIC, &f->flags) || |
f2f3729f NA |
744 | (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &f->flags) && |
745 | !test_bit(BR_FDB_OFFLOADED, &f->flags)) || | |
29e63fff | 746 | (vid && f->key.vlan_id != vid)) |
1da177e4 LT |
747 | continue; |
748 | ||
6869c3b0 | 749 | if (test_bit(BR_FDB_LOCAL, &f->flags)) |
eb793583 NA |
750 | fdb_delete_local(br, p, f); |
751 | else | |
161d82de | 752 | fdb_delete(br, f, true); |
1da177e4 LT |
753 | } |
754 | spin_unlock_bh(&br->hash_lock); | |
755 | } | |
756 | ||
e6373c4c | 757 | #if IS_ENABLED(CONFIG_ATM_LANE) |
da678292 MM |
758 | /* Interface used by ATM LANE hook to test |
759 | * if an addr is on some other bridge port */ | |
760 | int br_fdb_test_addr(struct net_device *dev, unsigned char *addr) | |
1da177e4 LT |
761 | { |
762 | struct net_bridge_fdb_entry *fdb; | |
b5ed54e9 | 763 | struct net_bridge_port *port; |
da678292 MM |
764 | int ret; |
765 | ||
1da177e4 | 766 | rcu_read_lock(); |
b5ed54e9 | 767 | port = br_port_get_rcu(dev); |
768 | if (!port) | |
769 | ret = 0; | |
770 | else { | |
3e19ae7c VO |
771 | const struct net_bridge_port *dst = NULL; |
772 | ||
bfd0aeac | 773 | fdb = br_fdb_find_rcu(port->br, addr, 0); |
3e19ae7c VO |
774 | if (fdb) |
775 | dst = READ_ONCE(fdb->dst); | |
776 | ||
777 | ret = dst && dst->dev != dev && | |
778 | dst->state == BR_STATE_FORWARDING; | |
b5ed54e9 | 779 | } |
1da177e4 | 780 | rcu_read_unlock(); |
1da177e4 | 781 | |
da678292 | 782 | return ret; |
1da177e4 | 783 | } |
da678292 | 784 | #endif /* CONFIG_ATM_LANE */ |
1da177e4 LT |
785 | |
786 | /* | |
9d6f229f | 787 | * Fill buffer with forwarding table records in |
1da177e4 LT |
788 | * the API format. |
789 | */ | |
790 | int br_fdb_fillbuf(struct net_bridge *br, void *buf, | |
791 | unsigned long maxnum, unsigned long skip) | |
792 | { | |
1da177e4 | 793 | struct net_bridge_fdb_entry *f; |
eb793583 NA |
794 | struct __fdb_entry *fe = buf; |
795 | int num = 0; | |
1da177e4 LT |
796 | |
797 | memset(buf, 0, maxnum*sizeof(struct __fdb_entry)); | |
798 | ||
799 | rcu_read_lock(); | |
eb793583 NA |
800 | hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) { |
801 | if (num >= maxnum) | |
802 | break; | |
1da177e4 | 803 | |
eb793583 NA |
804 | if (has_expired(br, f)) |
805 | continue; | |
1da177e4 | 806 | |
eb793583 NA |
807 | /* ignore pseudo entry for local MAC address */ |
808 | if (!f->dst) | |
809 | continue; | |
43598813 | 810 | |
eb793583 NA |
811 | if (skip) { |
812 | --skip; | |
813 | continue; | |
814 | } | |
1da177e4 | 815 | |
eb793583 NA |
816 | /* convert from internal format to API */ |
817 | memcpy(fe->mac_addr, f->key.addr.addr, ETH_ALEN); | |
ae4f8fca | 818 | |
eb793583 NA |
819 | /* due to ABI compat need to split into hi/lo */ |
820 | fe->port_no = f->dst->port_no; | |
821 | fe->port_hi = f->dst->port_no >> 8; | |
ae4f8fca | 822 | |
6869c3b0 | 823 | fe->is_local = test_bit(BR_FDB_LOCAL, &f->flags); |
29e63fff | 824 | if (!test_bit(BR_FDB_STATIC, &f->flags)) |
eb793583 NA |
825 | fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated); |
826 | ++fe; | |
827 | ++num; | |
1da177e4 | 828 | } |
1da177e4 LT |
829 | rcu_read_unlock(); |
830 | ||
831 | return num; | |
832 | } | |
833 | ||
03e9b64b | 834 | /* Add entry for local address of interface */ |
f6814fdc VO |
835 | int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source, |
836 | const unsigned char *addr, u16 vid) | |
1da177e4 LT |
837 | { |
838 | int ret; | |
839 | ||
840 | spin_lock_bh(&br->hash_lock); | |
4731b6d6 | 841 | ret = fdb_add_local(br, source, addr, vid); |
1da177e4 LT |
842 | spin_unlock_bh(&br->hash_lock); |
843 | return ret; | |
844 | } | |
845 | ||
31cbc39b NA |
846 | /* returns true if the fdb was modified */ |
847 | static bool __fdb_mark_active(struct net_bridge_fdb_entry *fdb) | |
848 | { | |
849 | return !!(test_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags) && | |
850 | test_and_clear_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags)); | |
851 | } | |
852 | ||
1da177e4 | 853 | void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, |
be0c5677 | 854 | const unsigned char *addr, u16 vid, unsigned long flags) |
1da177e4 | 855 | { |
1da177e4 LT |
856 | struct net_bridge_fdb_entry *fdb; |
857 | ||
858 | /* some users want to always flood. */ | |
859 | if (hold_time(br) == 0) | |
860 | return; | |
861 | ||
eb793583 | 862 | fdb = fdb_find_rcu(&br->fdb_hash_tbl, addr, vid); |
1da177e4 LT |
863 | if (likely(fdb)) { |
864 | /* attempt to update an entry for a local interface */ | |
6869c3b0 | 865 | if (unlikely(test_bit(BR_FDB_LOCAL, &fdb->flags))) { |
9d6f229f | 866 | if (net_ratelimit()) |
de1dfeef RP |
867 | br_warn(br, "received packet on %s with own address as source address (addr:%pM, vlan:%u)\n", |
868 | source->dev->name, addr, vid); | |
1da177e4 | 869 | } else { |
ca6d4480 | 870 | unsigned long now = jiffies; |
31cbc39b NA |
871 | bool fdb_modified = false; |
872 | ||
873 | if (now != fdb->updated) { | |
874 | fdb->updated = now; | |
875 | fdb_modified = __fdb_mark_active(fdb); | |
876 | } | |
ca6d4480 | 877 | |
1da177e4 | 878 | /* fastpath: update of existing entry */ |
3e19ae7c | 879 | if (unlikely(source != READ_ONCE(fdb->dst) && |
e0458d9a | 880 | !test_bit(BR_FDB_STICKY, &fdb->flags))) { |
6eb38bf8 | 881 | br_switchdev_fdb_notify(br, fdb, RTM_DELNEIGH); |
3e19ae7c | 882 | WRITE_ONCE(fdb->dst, source); |
c65c7a30 | 883 | fdb_modified = true; |
58073b32 | 884 | /* Take over HW learned entry */ |
58ec1ea6 NA |
885 | if (unlikely(test_bit(BR_FDB_ADDED_BY_EXT_LEARN, |
886 | &fdb->flags))) | |
887 | clear_bit(BR_FDB_ADDED_BY_EXT_LEARN, | |
888 | &fdb->flags); | |
a35ec8e3 HS |
889 | /* Clear locked flag when roaming to an |
890 | * unlocked port. | |
891 | */ | |
892 | if (unlikely(test_bit(BR_FDB_LOCKED, &fdb->flags))) | |
893 | clear_bit(BR_FDB_LOCKED, &fdb->flags); | |
c65c7a30 | 894 | } |
31cbc39b | 895 | |
be0c5677 | 896 | if (unlikely(test_bit(BR_FDB_ADDED_BY_USER, &flags))) |
ac3ca6af | 897 | set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags); |
e3cfddd5 | 898 | if (unlikely(fdb_modified)) { |
be0c5677 | 899 | trace_br_fdb_update(br, source, addr, vid, flags); |
161d82de | 900 | fdb_notify(br, fdb, RTM_NEWNEIGH, true); |
e3cfddd5 | 901 | } |
1da177e4 LT |
902 | } |
903 | } else { | |
f8ae737d | 904 | spin_lock(&br->hash_lock); |
be0c5677 | 905 | fdb = fdb_create(br, source, addr, vid, flags); |
eb793583 | 906 | if (fdb) { |
be0c5677 | 907 | trace_br_fdb_update(br, source, addr, vid, flags); |
161d82de | 908 | fdb_notify(br, fdb, RTM_NEWNEIGH, true); |
f58ee4e1 | 909 | } |
1da177e4 LT |
910 | /* else we lose race and someone else inserts |
911 | * it first, don't bother updating | |
912 | */ | |
f8ae737d | 913 | spin_unlock(&br->hash_lock); |
1da177e4 | 914 | } |
1da177e4 | 915 | } |
b078f0df | 916 | |
b078f0df | 917 | /* Dump information about entries, in response to GETNEIGH */ |
77162022 JF |
918 | int br_fdb_dump(struct sk_buff *skb, |
919 | struct netlink_callback *cb, | |
920 | struct net_device *dev, | |
5d5eacb3 | 921 | struct net_device *filter_dev, |
d297653d | 922 | int *idx) |
b078f0df | 923 | { |
77162022 | 924 | struct net_bridge *br = netdev_priv(dev); |
eb793583 | 925 | struct net_bridge_fdb_entry *f; |
d297653d | 926 | int err = 0; |
b078f0df | 927 | |
254ec036 | 928 | if (!netif_is_bridge_master(dev)) |
eb793583 | 929 | return err; |
b078f0df | 930 | |
d297653d RP |
931 | if (!filter_dev) { |
932 | err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); | |
933 | if (err < 0) | |
eb793583 | 934 | return err; |
d297653d | 935 | } |
6cb69742 | 936 | |
eb793583 NA |
937 | rcu_read_lock(); |
938 | hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) { | |
939 | if (*idx < cb->args[2]) | |
940 | goto skip; | |
941 | if (filter_dev && (!f->dst || f->dst->dev != filter_dev)) { | |
942 | if (filter_dev != dev) | |
77162022 | 943 | goto skip; |
eb793583 NA |
944 | /* !f->dst is a special case for bridge |
945 | * It means the MAC belongs to the bridge | |
946 | * Therefore need a little more filtering | |
947 | * we only want to dump the !f->dst case | |
948 | */ | |
949 | if (f->dst) | |
6cb69742 | 950 | goto skip; |
b078f0df | 951 | } |
eb793583 NA |
952 | if (!filter_dev && f->dst) |
953 | goto skip; | |
954 | ||
955 | err = fdb_fill_info(skb, br, f, | |
956 | NETLINK_CB(cb->skb).portid, | |
957 | cb->nlh->nlmsg_seq, | |
958 | RTM_NEWNEIGH, | |
959 | NLM_F_MULTI); | |
960 | if (err < 0) | |
961 | break; | |
962 | skip: | |
963 | *idx += 1; | |
b078f0df | 964 | } |
eb793583 | 965 | rcu_read_unlock(); |
b078f0df | 966 | |
d297653d | 967 | return err; |
b078f0df | 968 | } |
36fd2b63 | 969 | |
47674562 RP |
970 | int br_fdb_get(struct sk_buff *skb, |
971 | struct nlattr *tb[], | |
972 | struct net_device *dev, | |
973 | const unsigned char *addr, | |
974 | u16 vid, u32 portid, u32 seq, | |
975 | struct netlink_ext_ack *extack) | |
976 | { | |
977 | struct net_bridge *br = netdev_priv(dev); | |
978 | struct net_bridge_fdb_entry *f; | |
979 | int err = 0; | |
980 | ||
981 | rcu_read_lock(); | |
982 | f = br_fdb_find_rcu(br, addr, vid); | |
983 | if (!f) { | |
984 | NL_SET_ERR_MSG(extack, "Fdb entry not found"); | |
985 | err = -ENOENT; | |
986 | goto errout; | |
987 | } | |
988 | ||
989 | err = fdb_fill_info(skb, br, f, portid, seq, | |
990 | RTM_NEWNEIGH, 0); | |
991 | errout: | |
992 | rcu_read_unlock(); | |
993 | return err; | |
994 | } | |
995 | ||
31cbc39b NA |
996 | /* returns true if the fdb is modified */ |
997 | static bool fdb_handle_notify(struct net_bridge_fdb_entry *fdb, u8 notify) | |
998 | { | |
999 | bool modified = false; | |
1000 | ||
1001 | /* allow to mark an entry as inactive, usually done on creation */ | |
1002 | if ((notify & FDB_NOTIFY_INACTIVE_BIT) && | |
1003 | !test_and_set_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags)) | |
1004 | modified = true; | |
1005 | ||
1006 | if ((notify & FDB_NOTIFY_BIT) && | |
1007 | !test_and_set_bit(BR_FDB_NOTIFY, &fdb->flags)) { | |
1008 | /* enabled activity tracking */ | |
1009 | modified = true; | |
1010 | } else if (!(notify & FDB_NOTIFY_BIT) && | |
1011 | test_and_clear_bit(BR_FDB_NOTIFY, &fdb->flags)) { | |
1012 | /* disabled activity tracking, clear notify state */ | |
1013 | clear_bit(BR_FDB_NOTIFY_INACTIVE, &fdb->flags); | |
1014 | modified = true; | |
1015 | } | |
1016 | ||
1017 | return modified; | |
1018 | } | |
1019 | ||
292d1398 | 1020 | /* Update (create or replace) forwarding database entry */ |
7bb90c37 | 1021 | static int fdb_add_entry(struct net_bridge *br, struct net_bridge_port *source, |
31cbc39b NA |
1022 | const u8 *addr, struct ndmsg *ndm, u16 flags, u16 vid, |
1023 | struct nlattr *nfea_tb[]) | |
36fd2b63 | 1024 | { |
0592ff88 | 1025 | bool is_sticky = !!(ndm->ndm_flags & NTF_STICKY); |
b5f1d9ec | 1026 | bool refresh = !nfea_tb[NFEA_DONT_REFRESH]; |
36fd2b63 | 1027 | struct net_bridge_fdb_entry *fdb; |
0592ff88 | 1028 | u16 state = ndm->ndm_state; |
b0a397fb | 1029 | bool modified = false; |
31cbc39b | 1030 | u8 notify = 0; |
36fd2b63 | 1031 | |
eb8d7baa | 1032 | /* If the port cannot learn allow only local and static entries */ |
7bb90c37 | 1033 | if (source && !(state & NUD_PERMANENT) && !(state & NUD_NOARP) && |
eb8d7baa WK |
1034 | !(source->state == BR_STATE_LEARNING || |
1035 | source->state == BR_STATE_FORWARDING)) | |
1036 | return -EPERM; | |
1037 | ||
7bb90c37 TM |
1038 | if (!source && !(state & NUD_PERMANENT)) { |
1039 | pr_info("bridge: RTM_NEWNEIGH %s without NUD_PERMANENT\n", | |
1040 | br->dev->name); | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
435f2e7c NA |
1044 | if (is_sticky && (state & NUD_PERMANENT)) |
1045 | return -EINVAL; | |
1046 | ||
31cbc39b NA |
1047 | if (nfea_tb[NFEA_ACTIVITY_NOTIFY]) { |
1048 | notify = nla_get_u8(nfea_tb[NFEA_ACTIVITY_NOTIFY]); | |
1049 | if ((notify & ~BR_FDB_NOTIFY_SETTABLE_BITS) || | |
1050 | (notify & BR_FDB_NOTIFY_SETTABLE_BITS) == FDB_NOTIFY_INACTIVE_BIT) | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | ||
bfd0aeac | 1054 | fdb = br_fdb_find(br, addr, vid); |
64af1bac | 1055 | if (fdb == NULL) { |
1056 | if (!(flags & NLM_F_CREATE)) | |
1057 | return -ENOENT; | |
36fd2b63 | 1058 | |
3fb01a31 | 1059 | fdb = fdb_create(br, source, addr, vid, 0); |
64af1bac | 1060 | if (!fdb) |
1061 | return -ENOMEM; | |
b0a397fb | 1062 | |
1063 | modified = true; | |
64af1bac | 1064 | } else { |
1065 | if (flags & NLM_F_EXCL) | |
1066 | return -EEXIST; | |
b0a397fb | 1067 | |
3e19ae7c VO |
1068 | if (READ_ONCE(fdb->dst) != source) { |
1069 | WRITE_ONCE(fdb->dst, source); | |
b0a397fb | 1070 | modified = true; |
1071 | } | |
292d1398 | 1072 | } |
1073 | ||
3741873b | 1074 | if (fdb_to_nud(br, fdb) != state) { |
145beee8 | 1075 | if (state & NUD_PERMANENT) { |
6869c3b0 | 1076 | set_bit(BR_FDB_LOCAL, &fdb->flags); |
29e63fff | 1077 | if (!test_and_set_bit(BR_FDB_STATIC, &fdb->flags)) |
020ec6ba | 1078 | fdb_add_hw_addr(br, addr); |
145beee8 | 1079 | } else if (state & NUD_NOARP) { |
6869c3b0 | 1080 | clear_bit(BR_FDB_LOCAL, &fdb->flags); |
29e63fff | 1081 | if (!test_and_set_bit(BR_FDB_STATIC, &fdb->flags)) |
020ec6ba | 1082 | fdb_add_hw_addr(br, addr); |
145beee8 | 1083 | } else { |
6869c3b0 | 1084 | clear_bit(BR_FDB_LOCAL, &fdb->flags); |
29e63fff | 1085 | if (test_and_clear_bit(BR_FDB_STATIC, &fdb->flags)) |
020ec6ba | 1086 | fdb_del_hw_addr(br, addr); |
145beee8 | 1087 | } |
64af1bac | 1088 | |
b0a397fb | 1089 | modified = true; |
1090 | } | |
435f2e7c | 1091 | |
e0458d9a NA |
1092 | if (is_sticky != test_bit(BR_FDB_STICKY, &fdb->flags)) { |
1093 | change_bit(BR_FDB_STICKY, &fdb->flags); | |
435f2e7c NA |
1094 | modified = true; |
1095 | } | |
1096 | ||
a35ec8e3 HS |
1097 | if (test_and_clear_bit(BR_FDB_LOCKED, &fdb->flags)) |
1098 | modified = true; | |
1099 | ||
31cbc39b NA |
1100 | if (fdb_handle_notify(fdb, notify)) |
1101 | modified = true; | |
1102 | ||
ac3ca6af | 1103 | set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags); |
b0a397fb | 1104 | |
1105 | fdb->used = jiffies; | |
1106 | if (modified) { | |
b5f1d9ec NA |
1107 | if (refresh) |
1108 | fdb->updated = jiffies; | |
161d82de | 1109 | fdb_notify(br, fdb, RTM_NEWNEIGH, true); |
64af1bac | 1110 | } |
36fd2b63 | 1111 | |
36fd2b63 | 1112 | return 0; |
1113 | } | |
1114 | ||
7bb90c37 TM |
1115 | static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge *br, |
1116 | struct net_bridge_port *p, const unsigned char *addr, | |
0541a629 VO |
1117 | u16 nlh_flags, u16 vid, struct nlattr *nfea_tb[], |
1118 | struct netlink_ext_ack *extack) | |
1690be63 VY |
1119 | { |
1120 | int err = 0; | |
1121 | ||
1122 | if (ndm->ndm_flags & NTF_USE) { | |
7bb90c37 TM |
1123 | if (!p) { |
1124 | pr_info("bridge: RTM_NEWNEIGH %s with NTF_USE is not supported\n", | |
1125 | br->dev->name); | |
1126 | return -EINVAL; | |
1127 | } | |
5d1fcaf3 NA |
1128 | if (!nbp_state_should_learn(p)) |
1129 | return 0; | |
1130 | ||
c4c832f8 | 1131 | local_bh_disable(); |
1690be63 | 1132 | rcu_read_lock(); |
be0c5677 | 1133 | br_fdb_update(br, p, addr, vid, BIT(BR_FDB_ADDED_BY_USER)); |
1690be63 | 1134 | rcu_read_unlock(); |
c4c832f8 | 1135 | local_bh_enable(); |
eb100e0e | 1136 | } else if (ndm->ndm_flags & NTF_EXT_LEARNED) { |
0541a629 VO |
1137 | if (!p && !(ndm->ndm_state & NUD_PERMANENT)) { |
1138 | NL_SET_ERR_MSG_MOD(extack, | |
1139 | "FDB entry towards bridge must be permanent"); | |
1140 | return -EINVAL; | |
1141 | } | |
27fabd02 | 1142 | err = br_fdb_external_learn_add(br, p, addr, vid, false, true); |
1690be63 | 1143 | } else { |
7bb90c37 | 1144 | spin_lock_bh(&br->hash_lock); |
31cbc39b | 1145 | err = fdb_add_entry(br, p, addr, ndm, nlh_flags, vid, nfea_tb); |
7bb90c37 | 1146 | spin_unlock_bh(&br->hash_lock); |
1690be63 VY |
1147 | } |
1148 | ||
1149 | return err; | |
1150 | } | |
1151 | ||
31cbc39b NA |
1152 | static const struct nla_policy br_nda_fdb_pol[NFEA_MAX + 1] = { |
1153 | [NFEA_ACTIVITY_NOTIFY] = { .type = NLA_U8 }, | |
b5f1d9ec | 1154 | [NFEA_DONT_REFRESH] = { .type = NLA_FLAG }, |
31cbc39b NA |
1155 | }; |
1156 | ||
36fd2b63 | 1157 | /* Add new permanent fdb entry with RTM_NEWNEIGH */ |
edc7d573 | 1158 | int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
1159 | struct net_device *dev, | |
87b0984e PM |
1160 | const unsigned char *addr, u16 vid, u16 nlh_flags, |
1161 | struct netlink_ext_ack *extack) | |
36fd2b63 | 1162 | { |
31cbc39b | 1163 | struct nlattr *nfea_tb[NFEA_MAX + 1], *attr; |
2594e906 | 1164 | struct net_bridge_vlan_group *vg; |
3741873b | 1165 | struct net_bridge_port *p = NULL; |
2594e906 | 1166 | struct net_bridge_vlan *v; |
3741873b | 1167 | struct net_bridge *br = NULL; |
a35ec8e3 | 1168 | u32 ext_flags = 0; |
77162022 | 1169 | int err = 0; |
36fd2b63 | 1170 | |
b74fd306 RP |
1171 | trace_br_fdb_add(ndm, dev, addr, vid, nlh_flags); |
1172 | ||
292d1398 | 1173 | if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) { |
1174 | pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state); | |
1175 | return -EINVAL; | |
1176 | } | |
1177 | ||
537f7f84 SH |
1178 | if (is_zero_ether_addr(addr)) { |
1179 | pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n"); | |
1180 | return -EINVAL; | |
1181 | } | |
1182 | ||
254ec036 | 1183 | if (netif_is_bridge_master(dev)) { |
3741873b RP |
1184 | br = netdev_priv(dev); |
1185 | vg = br_vlan_group(br); | |
1186 | } else { | |
1187 | p = br_port_get_rtnl(dev); | |
1188 | if (!p) { | |
1189 | pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n", | |
1190 | dev->name); | |
1191 | return -EINVAL; | |
1192 | } | |
7bb90c37 | 1193 | br = p->br; |
3741873b | 1194 | vg = nbp_vlan_group(p); |
36fd2b63 | 1195 | } |
1196 | ||
a35ec8e3 HS |
1197 | if (tb[NDA_FLAGS_EXT]) |
1198 | ext_flags = nla_get_u32(tb[NDA_FLAGS_EXT]); | |
1199 | ||
1200 | if (ext_flags & NTF_EXT_LOCKED) { | |
1201 | NL_SET_ERR_MSG_MOD(extack, "Cannot add FDB entry with \"locked\" flag set"); | |
1202 | return -EINVAL; | |
1203 | } | |
1204 | ||
31cbc39b NA |
1205 | if (tb[NDA_FDB_EXT_ATTRS]) { |
1206 | attr = tb[NDA_FDB_EXT_ATTRS]; | |
1207 | err = nla_parse_nested(nfea_tb, NFEA_MAX, attr, | |
1208 | br_nda_fdb_pol, extack); | |
1209 | if (err) | |
1210 | return err; | |
1211 | } else { | |
1212 | memset(nfea_tb, 0, sizeof(struct nlattr *) * (NFEA_MAX + 1)); | |
1213 | } | |
1214 | ||
f6f6424b | 1215 | if (vid) { |
2594e906 | 1216 | v = br_vlan_find(vg, vid); |
3741873b RP |
1217 | if (!v || !br_vlan_should_use(v)) { |
1218 | pr_info("bridge: RTM_NEWNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); | |
1690be63 VY |
1219 | return -EINVAL; |
1220 | } | |
1221 | ||
1222 | /* VID was specified, so use it. */ | |
0541a629 VO |
1223 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, vid, nfea_tb, |
1224 | extack); | |
292d1398 | 1225 | } else { |
0541a629 VO |
1226 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, 0, nfea_tb, |
1227 | extack); | |
2594e906 | 1228 | if (err || !vg || !vg->num_vlans) |
1690be63 | 1229 | goto out; |
1690be63 VY |
1230 | |
1231 | /* We have vlans configured on this port and user didn't | |
1232 | * specify a VLAN. To be nice, add/update entry for every | |
1233 | * vlan on this port. | |
1234 | */ | |
2594e906 | 1235 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
3741873b RP |
1236 | if (!br_vlan_should_use(v)) |
1237 | continue; | |
31cbc39b | 1238 | err = __br_fdb_add(ndm, br, p, addr, nlh_flags, v->vid, |
0541a629 | 1239 | nfea_tb, extack); |
1690be63 VY |
1240 | if (err) |
1241 | goto out; | |
1690be63 | 1242 | } |
292d1398 | 1243 | } |
36fd2b63 | 1244 | |
1690be63 | 1245 | out: |
36fd2b63 | 1246 | return err; |
1247 | } | |
1248 | ||
5019ab50 NA |
1249 | static int fdb_delete_by_addr_and_port(struct net_bridge *br, |
1250 | const struct net_bridge_port *p, | |
8c86f967 | 1251 | const u8 *addr, u16 vlan) |
36fd2b63 | 1252 | { |
36fd2b63 | 1253 | struct net_bridge_fdb_entry *fdb; |
1254 | ||
bfd0aeac | 1255 | fdb = br_fdb_find(br, addr, vlan); |
3e19ae7c | 1256 | if (!fdb || READ_ONCE(fdb->dst) != p) |
36fd2b63 | 1257 | return -ENOENT; |
1258 | ||
161d82de | 1259 | fdb_delete(br, fdb, true); |
5019ab50 | 1260 | |
36fd2b63 | 1261 | return 0; |
1262 | } | |
1263 | ||
5019ab50 NA |
1264 | static int __br_fdb_delete(struct net_bridge *br, |
1265 | const struct net_bridge_port *p, | |
1690be63 VY |
1266 | const unsigned char *addr, u16 vid) |
1267 | { | |
1268 | int err; | |
1269 | ||
5019ab50 NA |
1270 | spin_lock_bh(&br->hash_lock); |
1271 | err = fdb_delete_by_addr_and_port(br, p, addr, vid); | |
1272 | spin_unlock_bh(&br->hash_lock); | |
1690be63 VY |
1273 | |
1274 | return err; | |
1275 | } | |
1276 | ||
36fd2b63 | 1277 | /* Remove neighbor entry with RTM_DELNEIGH */ |
1690be63 VY |
1278 | int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[], |
1279 | struct net_device *dev, | |
ca4567f1 AM |
1280 | const unsigned char *addr, u16 vid, |
1281 | struct netlink_ext_ack *extack) | |
36fd2b63 | 1282 | { |
2594e906 | 1283 | struct net_bridge_vlan_group *vg; |
3741873b | 1284 | struct net_bridge_port *p = NULL; |
2594e906 | 1285 | struct net_bridge_vlan *v; |
5019ab50 | 1286 | struct net_bridge *br; |
36fd2b63 | 1287 | int err; |
1690be63 | 1288 | |
254ec036 | 1289 | if (netif_is_bridge_master(dev)) { |
3741873b RP |
1290 | br = netdev_priv(dev); |
1291 | vg = br_vlan_group(br); | |
1292 | } else { | |
1293 | p = br_port_get_rtnl(dev); | |
1294 | if (!p) { | |
1295 | pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n", | |
1296 | dev->name); | |
1297 | return -EINVAL; | |
1298 | } | |
1299 | vg = nbp_vlan_group(p); | |
5019ab50 | 1300 | br = p->br; |
36fd2b63 | 1301 | } |
1302 | ||
f6f6424b | 1303 | if (vid) { |
2594e906 NA |
1304 | v = br_vlan_find(vg, vid); |
1305 | if (!v) { | |
3741873b | 1306 | pr_info("bridge: RTM_DELNEIGH with unconfigured vlan %d on %s\n", vid, dev->name); |
1690be63 VY |
1307 | return -EINVAL; |
1308 | } | |
36fd2b63 | 1309 | |
5019ab50 | 1310 | err = __br_fdb_delete(br, p, addr, vid); |
1690be63 | 1311 | } else { |
25d3b493 | 1312 | err = -ENOENT; |
5019ab50 | 1313 | err &= __br_fdb_delete(br, p, addr, 0); |
2594e906 | 1314 | if (!vg || !vg->num_vlans) |
5019ab50 | 1315 | return err; |
1690be63 | 1316 | |
3741873b RP |
1317 | list_for_each_entry(v, &vg->vlan_list, vlist) { |
1318 | if (!br_vlan_should_use(v)) | |
1319 | continue; | |
5019ab50 | 1320 | err &= __br_fdb_delete(br, p, addr, v->vid); |
3741873b | 1321 | } |
1690be63 | 1322 | } |
5019ab50 | 1323 | |
36fd2b63 | 1324 | return err; |
1325 | } | |
8db24af7 VY |
1326 | |
1327 | int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1328 | { | |
eb793583 | 1329 | struct net_bridge_fdb_entry *f, *tmp; |
367dc658 | 1330 | int err = 0; |
8db24af7 VY |
1331 | |
1332 | ASSERT_RTNL(); | |
1333 | ||
eb793583 NA |
1334 | /* the key here is that static entries change only under rtnl */ |
1335 | rcu_read_lock(); | |
1336 | hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) { | |
1337 | /* We only care for static entries */ | |
29e63fff | 1338 | if (!test_bit(BR_FDB_STATIC, &f->flags)) |
eb793583 NA |
1339 | continue; |
1340 | err = dev_uc_add(p->dev, f->key.addr.addr); | |
1341 | if (err) | |
1342 | goto rollback; | |
8db24af7 | 1343 | } |
eb793583 NA |
1344 | done: |
1345 | rcu_read_unlock(); | |
8db24af7 | 1346 | |
eb793583 | 1347 | return err; |
8db24af7 | 1348 | |
eb793583 NA |
1349 | rollback: |
1350 | hlist_for_each_entry_rcu(tmp, &br->fdb_list, fdb_node) { | |
1351 | /* We only care for static entries */ | |
29e63fff | 1352 | if (!test_bit(BR_FDB_STATIC, &tmp->flags)) |
eb793583 NA |
1353 | continue; |
1354 | if (tmp == f) | |
1355 | break; | |
1356 | dev_uc_del(p->dev, tmp->key.addr.addr); | |
8db24af7 | 1357 | } |
eb793583 NA |
1358 | |
1359 | goto done; | |
8db24af7 VY |
1360 | } |
1361 | ||
1362 | void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p) | |
1363 | { | |
eb793583 | 1364 | struct net_bridge_fdb_entry *f; |
8db24af7 VY |
1365 | |
1366 | ASSERT_RTNL(); | |
1367 | ||
eb793583 NA |
1368 | rcu_read_lock(); |
1369 | hlist_for_each_entry_rcu(f, &br->fdb_list, fdb_node) { | |
1370 | /* We only care for static entries */ | |
29e63fff | 1371 | if (!test_bit(BR_FDB_STATIC, &f->flags)) |
eb793583 | 1372 | continue; |
8db24af7 | 1373 | |
eb793583 | 1374 | dev_uc_del(p->dev, f->key.addr.addr); |
8db24af7 | 1375 | } |
eb793583 | 1376 | rcu_read_unlock(); |
8db24af7 | 1377 | } |
cf6b8e1e | 1378 | |
3aeb6617 | 1379 | int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, |
27fabd02 | 1380 | const unsigned char *addr, u16 vid, bool locked, |
161d82de | 1381 | bool swdev_notify) |
cf6b8e1e | 1382 | { |
cf6b8e1e | 1383 | struct net_bridge_fdb_entry *fdb; |
7597b266 | 1384 | bool modified = false; |
cf6b8e1e SF |
1385 | int err = 0; |
1386 | ||
b74fd306 RP |
1387 | trace_br_fdb_external_learn_add(br, p, addr, vid); |
1388 | ||
27fabd02 HS |
1389 | if (locked && (!p || !(p->flags & BR_PORT_MAB))) |
1390 | return -EINVAL; | |
1391 | ||
cf6b8e1e SF |
1392 | spin_lock_bh(&br->hash_lock); |
1393 | ||
bfd0aeac | 1394 | fdb = br_fdb_find(br, addr, vid); |
cf6b8e1e | 1395 | if (!fdb) { |
31f1155b NA |
1396 | unsigned long flags = BIT(BR_FDB_ADDED_BY_EXT_LEARN); |
1397 | ||
1398 | if (swdev_notify) | |
1399 | flags |= BIT(BR_FDB_ADDED_BY_USER); | |
0541a629 | 1400 | |
45a68787 | 1401 | if (!p) |
0541a629 VO |
1402 | flags |= BIT(BR_FDB_LOCAL); |
1403 | ||
27fabd02 HS |
1404 | if (locked) |
1405 | flags |= BIT(BR_FDB_LOCKED); | |
1406 | ||
31f1155b | 1407 | fdb = fdb_create(br, p, addr, vid, flags); |
cf6b8e1e SF |
1408 | if (!fdb) { |
1409 | err = -ENOMEM; | |
1410 | goto err_unlock; | |
1411 | } | |
161d82de | 1412 | fdb_notify(br, fdb, RTM_NEWNEIGH, swdev_notify); |
7597b266 | 1413 | } else { |
27fabd02 HS |
1414 | if (locked && |
1415 | (!test_bit(BR_FDB_LOCKED, &fdb->flags) || | |
1416 | READ_ONCE(fdb->dst) != p)) { | |
1417 | err = -EINVAL; | |
1418 | goto err_unlock; | |
1419 | } | |
1420 | ||
cf6b8e1e | 1421 | fdb->updated = jiffies; |
7597b266 | 1422 | |
3e19ae7c VO |
1423 | if (READ_ONCE(fdb->dst) != p) { |
1424 | WRITE_ONCE(fdb->dst, p); | |
7597b266 NA |
1425 | modified = true; |
1426 | } | |
1427 | ||
b5cd9f7c | 1428 | if (test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags)) { |
7597b266 NA |
1429 | /* Refresh entry */ |
1430 | fdb->used = jiffies; | |
ac3ca6af | 1431 | } else if (!test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags)) { |
7597b266 | 1432 | /* Take over SW learned entry */ |
b5cd9f7c | 1433 | set_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags); |
7597b266 NA |
1434 | modified = true; |
1435 | } | |
1436 | ||
27fabd02 HS |
1437 | if (locked != test_bit(BR_FDB_LOCKED, &fdb->flags)) { |
1438 | change_bit(BR_FDB_LOCKED, &fdb->flags); | |
1439 | modified = true; | |
1440 | } | |
1441 | ||
710ae728 | 1442 | if (swdev_notify) |
ac3ca6af | 1443 | set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags); |
710ae728 | 1444 | |
45a68787 | 1445 | if (!p) |
0541a629 VO |
1446 | set_bit(BR_FDB_LOCAL, &fdb->flags); |
1447 | ||
7597b266 | 1448 | if (modified) |
161d82de | 1449 | fdb_notify(br, fdb, RTM_NEWNEIGH, swdev_notify); |
cf6b8e1e SF |
1450 | } |
1451 | ||
1452 | err_unlock: | |
1453 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1454 | |
1455 | return err; | |
1456 | } | |
cf6b8e1e | 1457 | |
3aeb6617 | 1458 | int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p, |
161d82de PM |
1459 | const unsigned char *addr, u16 vid, |
1460 | bool swdev_notify) | |
cf6b8e1e | 1461 | { |
cf6b8e1e SF |
1462 | struct net_bridge_fdb_entry *fdb; |
1463 | int err = 0; | |
1464 | ||
cf6b8e1e SF |
1465 | spin_lock_bh(&br->hash_lock); |
1466 | ||
bfd0aeac | 1467 | fdb = br_fdb_find(br, addr, vid); |
b5cd9f7c | 1468 | if (fdb && test_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags)) |
161d82de | 1469 | fdb_delete(br, fdb, swdev_notify); |
cf6b8e1e SF |
1470 | else |
1471 | err = -ENOENT; | |
1472 | ||
1473 | spin_unlock_bh(&br->hash_lock); | |
cf6b8e1e SF |
1474 | |
1475 | return err; | |
1476 | } | |
9fe8bcec AS |
1477 | |
1478 | void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p, | |
e9ba0fbc | 1479 | const unsigned char *addr, u16 vid, bool offloaded) |
9fe8bcec AS |
1480 | { |
1481 | struct net_bridge_fdb_entry *fdb; | |
1482 | ||
1483 | spin_lock_bh(&br->hash_lock); | |
1484 | ||
1485 | fdb = br_fdb_find(br, addr, vid); | |
d38c6e3d NA |
1486 | if (fdb && offloaded != test_bit(BR_FDB_OFFLOADED, &fdb->flags)) |
1487 | change_bit(BR_FDB_OFFLOADED, &fdb->flags); | |
9fe8bcec AS |
1488 | |
1489 | spin_unlock_bh(&br->hash_lock); | |
1490 | } | |
43920edf PM |
1491 | |
1492 | void br_fdb_clear_offload(const struct net_device *dev, u16 vid) | |
1493 | { | |
1494 | struct net_bridge_fdb_entry *f; | |
1495 | struct net_bridge_port *p; | |
1496 | ||
1497 | ASSERT_RTNL(); | |
1498 | ||
1499 | p = br_port_get_rtnl(dev); | |
1500 | if (!p) | |
1501 | return; | |
1502 | ||
1503 | spin_lock_bh(&p->br->hash_lock); | |
1504 | hlist_for_each_entry(f, &p->br->fdb_list, fdb_node) { | |
1505 | if (f->dst == p && f->key.vlan_id == vid) | |
d38c6e3d | 1506 | clear_bit(BR_FDB_OFFLOADED, &f->flags); |
43920edf PM |
1507 | } |
1508 | spin_unlock_bh(&p->br->hash_lock); | |
1509 | } | |
1510 | EXPORT_SYMBOL_GPL(br_fdb_clear_offload); |