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add conn_src_sock.c+conn_trgt_sock.c, remove credits.c
[cor.git] / net / bridge / br_vlan.c
blobbb98984cd27d0edb68243f8ee6a027dfddc0861d
1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/kernel.h>
3 #include <linux/netdevice.h>
4 #include <linux/rtnetlink.h>
5 #include <linux/slab.h>
6 #include <net/switchdev.h>
7
8 #include "br_private.h"
9 #include "br_private_tunnel.h"
10
11 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid);
12
13 static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg,
14 const void *ptr)
15 {
16 const struct net_bridge_vlan *vle = ptr;
17 u16 vid = *(u16 *)arg->key;
18
19 return vle->vid != vid;
20 }
21
22 static const struct rhashtable_params br_vlan_rht_params = {
23 .head_offset = offsetof(struct net_bridge_vlan, vnode),
24 .key_offset = offsetof(struct net_bridge_vlan, vid),
25 .key_len = sizeof(u16),
26 .nelem_hint = 3,
27 .max_size = VLAN_N_VID,
28 .obj_cmpfn = br_vlan_cmp,
29 .automatic_shrinking = true,
30 };
31
32 static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid)
33 {
34 return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params);
35 }
36
37 static bool __vlan_add_pvid(struct net_bridge_vlan_group *vg, u16 vid)
38 {
39 if (vg->pvid == vid)
40 return false;
41
42 smp_wmb();
43 vg->pvid = vid;
44
45 return true;
46 }
47
48 static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
49 {
50 if (vg->pvid != vid)
51 return false;
52
53 smp_wmb();
54 vg->pvid = 0;
55
56 return true;
57 }
58
59 /* return true if anything changed, false otherwise */
60 static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
61 {
62 struct net_bridge_vlan_group *vg;
63 u16 old_flags = v->flags;
64 bool ret;
65
66 if (br_vlan_is_master(v))
67 vg = br_vlan_group(v->br);
68 else
69 vg = nbp_vlan_group(v->port);
70
71 if (flags & BRIDGE_VLAN_INFO_PVID)
72 ret = __vlan_add_pvid(vg, v->vid);
73 else
74 ret = __vlan_delete_pvid(vg, v->vid);
75
76 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
77 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
78 else
79 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
80
81 return ret || !!(old_flags ^ v->flags);
82 }
83
84 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
85 struct net_bridge_vlan *v, u16 flags,
86 struct netlink_ext_ack *extack)
87 {
88 int err;
89
90 /* Try switchdev op first. In case it is not supported, fallback to
91 * 8021q add.
92 */
93 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
94 if (err == -EOPNOTSUPP)
95 return vlan_vid_add(dev, br->vlan_proto, v->vid);
96 v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV;
97 return err;
98 }
99
100 static void __vlan_add_list(struct net_bridge_vlan *v)
101 {
102 struct net_bridge_vlan_group *vg;
103 struct list_head *headp, *hpos;
104 struct net_bridge_vlan *vent;
105
106 if (br_vlan_is_master(v))
107 vg = br_vlan_group(v->br);
108 else
109 vg = nbp_vlan_group(v->port);
110
111 headp = &vg->vlan_list;
112 list_for_each_prev(hpos, headp) {
113 vent = list_entry(hpos, struct net_bridge_vlan, vlist);
114 if (v->vid < vent->vid)
115 continue;
116 else
117 break;
118 }
119 list_add_rcu(&v->vlist, hpos);
120 }
121
122 static void __vlan_del_list(struct net_bridge_vlan *v)
123 {
124 list_del_rcu(&v->vlist);
125 }
126
127 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
128 const struct net_bridge_vlan *v)
129 {
130 int err;
131
132 /* Try switchdev op first. In case it is not supported, fallback to
133 * 8021q del.
134 */
135 err = br_switchdev_port_vlan_del(dev, v->vid);
136 if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV))
137 vlan_vid_del(dev, br->vlan_proto, v->vid);
138 return err == -EOPNOTSUPP ? 0 : err;
139 }
140
141 /* Returns a master vlan, if it didn't exist it gets created. In all cases a
142 * a reference is taken to the master vlan before returning.
143 */
144 static struct net_bridge_vlan *
145 br_vlan_get_master(struct net_bridge *br, u16 vid,
146 struct netlink_ext_ack *extack)
147 {
148 struct net_bridge_vlan_group *vg;
149 struct net_bridge_vlan *masterv;
150
151 vg = br_vlan_group(br);
152 masterv = br_vlan_find(vg, vid);
153 if (!masterv) {
154 bool changed;
155
156 /* missing global ctx, create it now */
157 if (br_vlan_add(br, vid, 0, &changed, extack))
158 return NULL;
159 masterv = br_vlan_find(vg, vid);
160 if (WARN_ON(!masterv))
161 return NULL;
162 refcount_set(&masterv->refcnt, 1);
163 return masterv;
164 }
165 refcount_inc(&masterv->refcnt);
166
167 return masterv;
168 }
169
170 static void br_master_vlan_rcu_free(struct rcu_head *rcu)
171 {
172 struct net_bridge_vlan *v;
173
174 v = container_of(rcu, struct net_bridge_vlan, rcu);
175 WARN_ON(!br_vlan_is_master(v));
176 free_percpu(v->stats);
177 v->stats = NULL;
178 kfree(v);
179 }
180
181 static void br_vlan_put_master(struct net_bridge_vlan *masterv)
182 {
183 struct net_bridge_vlan_group *vg;
184
185 if (!br_vlan_is_master(masterv))
186 return;
187
188 vg = br_vlan_group(masterv->br);
189 if (refcount_dec_and_test(&masterv->refcnt)) {
190 rhashtable_remove_fast(&vg->vlan_hash,
191 &masterv->vnode, br_vlan_rht_params);
192 __vlan_del_list(masterv);
193 call_rcu(&masterv->rcu, br_master_vlan_rcu_free);
194 }
195 }
196
197 static void nbp_vlan_rcu_free(struct rcu_head *rcu)
198 {
199 struct net_bridge_vlan *v;
200
201 v = container_of(rcu, struct net_bridge_vlan, rcu);
202 WARN_ON(br_vlan_is_master(v));
203 /* if we had per-port stats configured then free them here */
204 if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS)
205 free_percpu(v->stats);
206 v->stats = NULL;
207 kfree(v);
208 }
209
210 /* This is the shared VLAN add function which works for both ports and bridge
211 * devices. There are four possible calls to this function in terms of the
212 * vlan entry type:
213 * 1. vlan is being added on a port (no master flags, global entry exists)
214 * 2. vlan is being added on a bridge (both master and brentry flags)
215 * 3. vlan is being added on a port, but a global entry didn't exist which
216 * is being created right now (master flag set, brentry flag unset), the
217 * global entry is used for global per-vlan features, but not for filtering
218 * 4. same as 3 but with both master and brentry flags set so the entry
219 * will be used for filtering in both the port and the bridge
220 */
221 static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
222 struct netlink_ext_ack *extack)
223 {
224 struct net_bridge_vlan *masterv = NULL;
225 struct net_bridge_port *p = NULL;
226 struct net_bridge_vlan_group *vg;
227 struct net_device *dev;
228 struct net_bridge *br;
229 int err;
230
231 if (br_vlan_is_master(v)) {
232 br = v->br;
233 dev = br->dev;
234 vg = br_vlan_group(br);
235 } else {
236 p = v->port;
237 br = p->br;
238 dev = p->dev;
239 vg = nbp_vlan_group(p);
240 }
241
242 if (p) {
243 /* Add VLAN to the device filter if it is supported.
244 * This ensures tagged traffic enters the bridge when
245 * promiscuous mode is disabled by br_manage_promisc().
246 */
247 err = __vlan_vid_add(dev, br, v, flags, extack);
248 if (err)
249 goto out;
250
251 /* need to work on the master vlan too */
252 if (flags & BRIDGE_VLAN_INFO_MASTER) {
253 bool changed;
254
255 err = br_vlan_add(br, v->vid,
256 flags | BRIDGE_VLAN_INFO_BRENTRY,
257 &changed, extack);
258 if (err)
259 goto out_filt;
260 }
261
262 masterv = br_vlan_get_master(br, v->vid, extack);
263 if (!masterv)
264 goto out_filt;
265 v->brvlan = masterv;
266 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) {
267 v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
268 if (!v->stats) {
269 err = -ENOMEM;
270 goto out_filt;
271 }
272 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
273 } else {
274 v->stats = masterv->stats;
275 }
276 } else {
277 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
278 if (err && err != -EOPNOTSUPP)
279 goto out;
280 }
281
282 /* Add the dev mac and count the vlan only if it's usable */
283 if (br_vlan_should_use(v)) {
284 err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
285 if (err) {
286 br_err(br, "failed insert local address into bridge forwarding table\n");
287 goto out_filt;
288 }
289 vg->num_vlans++;
290 }
291
292 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
293 br_vlan_rht_params);
294 if (err)
295 goto out_fdb_insert;
296
297 __vlan_add_list(v);
298 __vlan_add_flags(v, flags);
299
300 if (p)
301 nbp_vlan_set_vlan_dev_state(p, v->vid);
302 out:
303 return err;
304
305 out_fdb_insert:
306 if (br_vlan_should_use(v)) {
307 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
308 vg->num_vlans--;
309 }
310
311 out_filt:
312 if (p) {
313 __vlan_vid_del(dev, br, v);
314 if (masterv) {
315 if (v->stats && masterv->stats != v->stats)
316 free_percpu(v->stats);
317 v->stats = NULL;
318
319 br_vlan_put_master(masterv);
320 v->brvlan = NULL;
321 }
322 } else {
323 br_switchdev_port_vlan_del(dev, v->vid);
324 }
325
326 goto out;
327 }
328
329 static int __vlan_del(struct net_bridge_vlan *v)
330 {
331 struct net_bridge_vlan *masterv = v;
332 struct net_bridge_vlan_group *vg;
333 struct net_bridge_port *p = NULL;
334 int err = 0;
335
336 if (br_vlan_is_master(v)) {
337 vg = br_vlan_group(v->br);
338 } else {
339 p = v->port;
340 vg = nbp_vlan_group(v->port);
341 masterv = v->brvlan;
342 }
343
344 __vlan_delete_pvid(vg, v->vid);
345 if (p) {
346 err = __vlan_vid_del(p->dev, p->br, v);
347 if (err)
348 goto out;
349 } else {
350 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
351 if (err && err != -EOPNOTSUPP)
352 goto out;
353 err = 0;
354 }
355
356 if (br_vlan_should_use(v)) {
357 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
358 vg->num_vlans--;
359 }
360
361 if (masterv != v) {
362 vlan_tunnel_info_del(vg, v);
363 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
364 br_vlan_rht_params);
365 __vlan_del_list(v);
366 nbp_vlan_set_vlan_dev_state(p, v->vid);
367 call_rcu(&v->rcu, nbp_vlan_rcu_free);
368 }
369
370 br_vlan_put_master(masterv);
371 out:
372 return err;
373 }
374
375 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
376 {
377 WARN_ON(!list_empty(&vg->vlan_list));
378 rhashtable_destroy(&vg->vlan_hash);
379 vlan_tunnel_deinit(vg);
380 kfree(vg);
381 }
382
383 static void __vlan_flush(struct net_bridge_vlan_group *vg)
384 {
385 struct net_bridge_vlan *vlan, *tmp;
386
387 __vlan_delete_pvid(vg, vg->pvid);
388 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist)
389 __vlan_del(vlan);
390 }
391
392 struct sk_buff *br_handle_vlan(struct net_bridge *br,
393 const struct net_bridge_port *p,
394 struct net_bridge_vlan_group *vg,
395 struct sk_buff *skb)
396 {
397 struct br_vlan_stats *stats;
398 struct net_bridge_vlan *v;
399 u16 vid;
400
401 /* If this packet was not filtered at input, let it pass */
402 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
403 goto out;
404
405 /* At this point, we know that the frame was filtered and contains
406 * a valid vlan id. If the vlan id has untagged flag set,
407 * send untagged; otherwise, send tagged.
408 */
409 br_vlan_get_tag(skb, &vid);
410 v = br_vlan_find(vg, vid);
411 /* Vlan entry must be configured at this point. The
412 * only exception is the bridge is set in promisc mode and the
413 * packet is destined for the bridge device. In this case
414 * pass the packet as is.
415 */
416 if (!v || !br_vlan_should_use(v)) {
417 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
418 goto out;
419 } else {
420 kfree_skb(skb);
421 return NULL;
422 }
423 }
424 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
425 stats = this_cpu_ptr(v->stats);
426 u64_stats_update_begin(&stats->syncp);
427 stats->tx_bytes += skb->len;
428 stats->tx_packets++;
429 u64_stats_update_end(&stats->syncp);
430 }
431
432 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
433 __vlan_hwaccel_clear_tag(skb);
434
435 if (p && (p->flags & BR_VLAN_TUNNEL) &&
436 br_handle_egress_vlan_tunnel(skb, v)) {
437 kfree_skb(skb);
438 return NULL;
439 }
440 out:
441 return skb;
442 }
443
444 /* Called under RCU */
445 static bool __allowed_ingress(const struct net_bridge *br,
446 struct net_bridge_vlan_group *vg,
447 struct sk_buff *skb, u16 *vid)
448 {
449 struct br_vlan_stats *stats;
450 struct net_bridge_vlan *v;
451 bool tagged;
452
453 BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
454 /* If vlan tx offload is disabled on bridge device and frame was
455 * sent from vlan device on the bridge device, it does not have
456 * HW accelerated vlan tag.
457 */
458 if (unlikely(!skb_vlan_tag_present(skb) &&
459 skb->protocol == br->vlan_proto)) {
460 skb = skb_vlan_untag(skb);
461 if (unlikely(!skb))
462 return false;
463 }
464
465 if (!br_vlan_get_tag(skb, vid)) {
466 /* Tagged frame */
467 if (skb->vlan_proto != br->vlan_proto) {
468 /* Protocol-mismatch, empty out vlan_tci for new tag */
469 skb_push(skb, ETH_HLEN);
470 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
471 skb_vlan_tag_get(skb));
472 if (unlikely(!skb))
473 return false;
474
475 skb_pull(skb, ETH_HLEN);
476 skb_reset_mac_len(skb);
477 *vid = 0;
478 tagged = false;
479 } else {
480 tagged = true;
481 }
482 } else {
483 /* Untagged frame */
484 tagged = false;
485 }
486
487 if (!*vid) {
488 u16 pvid = br_get_pvid(vg);
489
490 /* Frame had a tag with VID 0 or did not have a tag.
491 * See if pvid is set on this port. That tells us which
492 * vlan untagged or priority-tagged traffic belongs to.
493 */
494 if (!pvid)
495 goto drop;
496
497 /* PVID is set on this port. Any untagged or priority-tagged
498 * ingress frame is considered to belong to this vlan.
499 */
500 *vid = pvid;
501 if (likely(!tagged))
502 /* Untagged Frame. */
503 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
504 else
505 /* Priority-tagged Frame.
506 * At this point, we know that skb->vlan_tci VID
507 * field was 0.
508 * We update only VID field and preserve PCP field.
509 */
510 skb->vlan_tci |= pvid;
511
512 /* if stats are disabled we can avoid the lookup */
513 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED))
514 return true;
515 }
516 v = br_vlan_find(vg, *vid);
517 if (!v || !br_vlan_should_use(v))
518 goto drop;
519
520 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
521 stats = this_cpu_ptr(v->stats);
522 u64_stats_update_begin(&stats->syncp);
523 stats->rx_bytes += skb->len;
524 stats->rx_packets++;
525 u64_stats_update_end(&stats->syncp);
526 }
527
528 return true;
529
530 drop:
531 kfree_skb(skb);
532 return false;
533 }
534
535 bool br_allowed_ingress(const struct net_bridge *br,
536 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
537 u16 *vid)
538 {
539 /* If VLAN filtering is disabled on the bridge, all packets are
540 * permitted.
541 */
542 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
543 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
544 return true;
545 }
546
547 return __allowed_ingress(br, vg, skb, vid);
548 }
549
550 /* Called under RCU. */
551 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
552 const struct sk_buff *skb)
553 {
554 const struct net_bridge_vlan *v;
555 u16 vid;
556
557 /* If this packet was not filtered at input, let it pass */
558 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
559 return true;
560
561 br_vlan_get_tag(skb, &vid);
562 v = br_vlan_find(vg, vid);
563 if (v && br_vlan_should_use(v))
564 return true;
565
566 return false;
567 }
568
569 /* Called under RCU */
570 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
571 {
572 struct net_bridge_vlan_group *vg;
573 struct net_bridge *br = p->br;
574
575 /* If filtering was disabled at input, let it pass. */
576 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
577 return true;
578
579 vg = nbp_vlan_group_rcu(p);
580 if (!vg || !vg->num_vlans)
581 return false;
582
583 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
584 *vid = 0;
585
586 if (!*vid) {
587 *vid = br_get_pvid(vg);
588 if (!*vid)
589 return false;
590
591 return true;
592 }
593
594 if (br_vlan_find(vg, *vid))
595 return true;
596
597 return false;
598 }
599
600 static int br_vlan_add_existing(struct net_bridge *br,
601 struct net_bridge_vlan_group *vg,
602 struct net_bridge_vlan *vlan,
603 u16 flags, bool *changed,
604 struct netlink_ext_ack *extack)
605 {
606 int err;
607
608 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
609 if (err && err != -EOPNOTSUPP)
610 return err;
611
612 if (!br_vlan_is_brentry(vlan)) {
613 /* Trying to change flags of non-existent bridge vlan */
614 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
615 err = -EINVAL;
616 goto err_flags;
617 }
618 /* It was only kept for port vlans, now make it real */
619 err = br_fdb_insert(br, NULL, br->dev->dev_addr,
620 vlan->vid);
621 if (err) {
622 br_err(br, "failed to insert local address into bridge forwarding table\n");
623 goto err_fdb_insert;
624 }
625
626 refcount_inc(&vlan->refcnt);
627 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
628 vg->num_vlans++;
629 *changed = true;
630 }
631
632 if (__vlan_add_flags(vlan, flags))
633 *changed = true;
634
635 return 0;
636
637 err_fdb_insert:
638 err_flags:
639 br_switchdev_port_vlan_del(br->dev, vlan->vid);
640 return err;
641 }
642
643 /* Must be protected by RTNL.
644 * Must be called with vid in range from 1 to 4094 inclusive.
645 * changed must be true only if the vlan was created or updated
646 */
647 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
648 struct netlink_ext_ack *extack)
649 {
650 struct net_bridge_vlan_group *vg;
651 struct net_bridge_vlan *vlan;
652 int ret;
653
654 ASSERT_RTNL();
655
656 *changed = false;
657 vg = br_vlan_group(br);
658 vlan = br_vlan_find(vg, vid);
659 if (vlan)
660 return br_vlan_add_existing(br, vg, vlan, flags, changed,
661 extack);
662
663 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
664 if (!vlan)
665 return -ENOMEM;
666
667 vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
668 if (!vlan->stats) {
669 kfree(vlan);
670 return -ENOMEM;
671 }
672 vlan->vid = vid;
673 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
674 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
675 vlan->br = br;
676 if (flags & BRIDGE_VLAN_INFO_BRENTRY)
677 refcount_set(&vlan->refcnt, 1);
678 ret = __vlan_add(vlan, flags, extack);
679 if (ret) {
680 free_percpu(vlan->stats);
681 kfree(vlan);
682 } else {
683 *changed = true;
684 }
685
686 return ret;
687 }
688
689 /* Must be protected by RTNL.
690 * Must be called with vid in range from 1 to 4094 inclusive.
691 */
692 int br_vlan_delete(struct net_bridge *br, u16 vid)
693 {
694 struct net_bridge_vlan_group *vg;
695 struct net_bridge_vlan *v;
696
697 ASSERT_RTNL();
698
699 vg = br_vlan_group(br);
700 v = br_vlan_find(vg, vid);
701 if (!v || !br_vlan_is_brentry(v))
702 return -ENOENT;
703
704 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
705 br_fdb_delete_by_port(br, NULL, vid, 0);
706
707 vlan_tunnel_info_del(vg, v);
708
709 return __vlan_del(v);
710 }
711
712 void br_vlan_flush(struct net_bridge *br)
713 {
714 struct net_bridge_vlan_group *vg;
715
716 ASSERT_RTNL();
717
718 vg = br_vlan_group(br);
719 __vlan_flush(vg);
720 RCU_INIT_POINTER(br->vlgrp, NULL);
721 synchronize_rcu();
722 __vlan_group_free(vg);
723 }
724
725 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
726 {
727 if (!vg)
728 return NULL;
729
730 return br_vlan_lookup(&vg->vlan_hash, vid);
731 }
732
733 /* Must be protected by RTNL. */
734 static void recalculate_group_addr(struct net_bridge *br)
735 {
736 if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
737 return;
738
739 spin_lock_bh(&br->lock);
740 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
741 br->vlan_proto == htons(ETH_P_8021Q)) {
742 /* Bridge Group Address */
743 br->group_addr[5] = 0x00;
744 } else { /* vlan_enabled && ETH_P_8021AD */
745 /* Provider Bridge Group Address */
746 br->group_addr[5] = 0x08;
747 }
748 spin_unlock_bh(&br->lock);
749 }
750
751 /* Must be protected by RTNL. */
752 void br_recalculate_fwd_mask(struct net_bridge *br)
753 {
754 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
755 br->vlan_proto == htons(ETH_P_8021Q))
756 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
757 else /* vlan_enabled && ETH_P_8021AD */
758 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
759 ~(1u << br->group_addr[5]);
760 }
761
762 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
763 {
764 struct switchdev_attr attr = {
765 .orig_dev = br->dev,
766 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
767 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
768 .u.vlan_filtering = val,
769 };
770 int err;
771
772 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
773 return 0;
774
775 err = switchdev_port_attr_set(br->dev, &attr);
776 if (err && err != -EOPNOTSUPP)
777 return err;
778
779 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
780 br_manage_promisc(br);
781 recalculate_group_addr(br);
782 br_recalculate_fwd_mask(br);
783
784 return 0;
785 }
786
787 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
788 {
789 return __br_vlan_filter_toggle(br, val);
790 }
791
792 bool br_vlan_enabled(const struct net_device *dev)
793 {
794 struct net_bridge *br = netdev_priv(dev);
795
796 return br_opt_get(br, BROPT_VLAN_ENABLED);
797 }
798 EXPORT_SYMBOL_GPL(br_vlan_enabled);
799
800 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
801 {
802 struct net_bridge *br = netdev_priv(dev);
803
804 *p_proto = ntohs(br->vlan_proto);
805
806 return 0;
807 }
808 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
809
810 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
811 {
812 int err = 0;
813 struct net_bridge_port *p;
814 struct net_bridge_vlan *vlan;
815 struct net_bridge_vlan_group *vg;
816 __be16 oldproto;
817
818 if (br->vlan_proto == proto)
819 return 0;
820
821 /* Add VLANs for the new proto to the device filter. */
822 list_for_each_entry(p, &br->port_list, list) {
823 vg = nbp_vlan_group(p);
824 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
825 err = vlan_vid_add(p->dev, proto, vlan->vid);
826 if (err)
827 goto err_filt;
828 }
829 }
830
831 oldproto = br->vlan_proto;
832 br->vlan_proto = proto;
833
834 recalculate_group_addr(br);
835 br_recalculate_fwd_mask(br);
836
837 /* Delete VLANs for the old proto from the device filter. */
838 list_for_each_entry(p, &br->port_list, list) {
839 vg = nbp_vlan_group(p);
840 list_for_each_entry(vlan, &vg->vlan_list, vlist)
841 vlan_vid_del(p->dev, oldproto, vlan->vid);
842 }
843
844 return 0;
845
846 err_filt:
847 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
848 vlan_vid_del(p->dev, proto, vlan->vid);
849
850 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
851 vg = nbp_vlan_group(p);
852 list_for_each_entry(vlan, &vg->vlan_list, vlist)
853 vlan_vid_del(p->dev, proto, vlan->vid);
854 }
855
856 return err;
857 }
858
859 int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
860 {
861 if (val != ETH_P_8021Q && val != ETH_P_8021AD)
862 return -EPROTONOSUPPORT;
863
864 return __br_vlan_set_proto(br, htons(val));
865 }
866
867 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
868 {
869 switch (val) {
870 case 0:
871 case 1:
872 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
873 break;
874 default:
875 return -EINVAL;
876 }
877
878 return 0;
879 }
880
881 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
882 {
883 struct net_bridge_port *p;
884
885 /* allow to change the option if there are no port vlans configured */
886 list_for_each_entry(p, &br->port_list, list) {
887 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
888
889 if (vg->num_vlans)
890 return -EBUSY;
891 }
892
893 switch (val) {
894 case 0:
895 case 1:
896 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
897 break;
898 default:
899 return -EINVAL;
900 }
901
902 return 0;
903 }
904
905 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
906 {
907 struct net_bridge_vlan *v;
908
909 if (vid != vg->pvid)
910 return false;
911
912 v = br_vlan_lookup(&vg->vlan_hash, vid);
913 if (v && br_vlan_should_use(v) &&
914 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
915 return true;
916
917 return false;
918 }
919
920 static void br_vlan_disable_default_pvid(struct net_bridge *br)
921 {
922 struct net_bridge_port *p;
923 u16 pvid = br->default_pvid;
924
925 /* Disable default_pvid on all ports where it is still
926 * configured.
927 */
928 if (vlan_default_pvid(br_vlan_group(br), pvid))
929 br_vlan_delete(br, pvid);
930
931 list_for_each_entry(p, &br->port_list, list) {
932 if (vlan_default_pvid(nbp_vlan_group(p), pvid))
933 nbp_vlan_delete(p, pvid);
934 }
935
936 br->default_pvid = 0;
937 }
938
939 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
940 struct netlink_ext_ack *extack)
941 {
942 const struct net_bridge_vlan *pvent;
943 struct net_bridge_vlan_group *vg;
944 struct net_bridge_port *p;
945 unsigned long *changed;
946 bool vlchange;
947 u16 old_pvid;
948 int err = 0;
949
950 if (!pvid) {
951 br_vlan_disable_default_pvid(br);
952 return 0;
953 }
954
955 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
956 if (!changed)
957 return -ENOMEM;
958
959 old_pvid = br->default_pvid;
960
961 /* Update default_pvid config only if we do not conflict with
962 * user configuration.
963 */
964 vg = br_vlan_group(br);
965 pvent = br_vlan_find(vg, pvid);
966 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
967 (!pvent || !br_vlan_should_use(pvent))) {
968 err = br_vlan_add(br, pvid,
969 BRIDGE_VLAN_INFO_PVID |
970 BRIDGE_VLAN_INFO_UNTAGGED |
971 BRIDGE_VLAN_INFO_BRENTRY,
972 &vlchange, extack);
973 if (err)
974 goto out;
975 br_vlan_delete(br, old_pvid);
976 set_bit(0, changed);
977 }
978
979 list_for_each_entry(p, &br->port_list, list) {
980 /* Update default_pvid config only if we do not conflict with
981 * user configuration.
982 */
983 vg = nbp_vlan_group(p);
984 if ((old_pvid &&
985 !vlan_default_pvid(vg, old_pvid)) ||
986 br_vlan_find(vg, pvid))
987 continue;
988
989 err = nbp_vlan_add(p, pvid,
990 BRIDGE_VLAN_INFO_PVID |
991 BRIDGE_VLAN_INFO_UNTAGGED,
992 &vlchange, extack);
993 if (err)
994 goto err_port;
995 nbp_vlan_delete(p, old_pvid);
996 set_bit(p->port_no, changed);
997 }
998
999 br->default_pvid = pvid;
1000
1001 out:
1002 bitmap_free(changed);
1003 return err;
1004
1005 err_port:
1006 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1007 if (!test_bit(p->port_no, changed))
1008 continue;
1009
1010 if (old_pvid)
1011 nbp_vlan_add(p, old_pvid,
1012 BRIDGE_VLAN_INFO_PVID |
1013 BRIDGE_VLAN_INFO_UNTAGGED,
1014 &vlchange, NULL);
1015 nbp_vlan_delete(p, pvid);
1016 }
1017
1018 if (test_bit(0, changed)) {
1019 if (old_pvid)
1020 br_vlan_add(br, old_pvid,
1021 BRIDGE_VLAN_INFO_PVID |
1022 BRIDGE_VLAN_INFO_UNTAGGED |
1023 BRIDGE_VLAN_INFO_BRENTRY,
1024 &vlchange, NULL);
1025 br_vlan_delete(br, pvid);
1026 }
1027 goto out;
1028 }
1029
1030 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
1031 {
1032 u16 pvid = val;
1033 int err = 0;
1034
1035 if (val >= VLAN_VID_MASK)
1036 return -EINVAL;
1037
1038 if (pvid == br->default_pvid)
1039 goto out;
1040
1041 /* Only allow default pvid change when filtering is disabled */
1042 if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1043 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1044 err = -EPERM;
1045 goto out;
1046 }
1047 err = __br_vlan_set_default_pvid(br, pvid, NULL);
1048 out:
1049 return err;
1050 }
1051
1052 int br_vlan_init(struct net_bridge *br)
1053 {
1054 struct net_bridge_vlan_group *vg;
1055 int ret = -ENOMEM;
1056
1057 vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1058 if (!vg)
1059 goto out;
1060 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1061 if (ret)
1062 goto err_rhtbl;
1063 ret = vlan_tunnel_init(vg);
1064 if (ret)
1065 goto err_tunnel_init;
1066 INIT_LIST_HEAD(&vg->vlan_list);
1067 br->vlan_proto = htons(ETH_P_8021Q);
1068 br->default_pvid = 1;
1069 rcu_assign_pointer(br->vlgrp, vg);
1070
1071 out:
1072 return ret;
1073
1074 err_tunnel_init:
1075 rhashtable_destroy(&vg->vlan_hash);
1076 err_rhtbl:
1077 kfree(vg);
1078
1079 goto out;
1080 }
1081
1082 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1083 {
1084 struct switchdev_attr attr = {
1085 .orig_dev = p->br->dev,
1086 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1087 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1088 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1089 };
1090 struct net_bridge_vlan_group *vg;
1091 int ret = -ENOMEM;
1092
1093 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1094 if (!vg)
1095 goto out;
1096
1097 ret = switchdev_port_attr_set(p->dev, &attr);
1098 if (ret && ret != -EOPNOTSUPP)
1099 goto err_vlan_enabled;
1100
1101 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1102 if (ret)
1103 goto err_rhtbl;
1104 ret = vlan_tunnel_init(vg);
1105 if (ret)
1106 goto err_tunnel_init;
1107 INIT_LIST_HEAD(&vg->vlan_list);
1108 rcu_assign_pointer(p->vlgrp, vg);
1109 if (p->br->default_pvid) {
1110 bool changed;
1111
1112 ret = nbp_vlan_add(p, p->br->default_pvid,
1113 BRIDGE_VLAN_INFO_PVID |
1114 BRIDGE_VLAN_INFO_UNTAGGED,
1115 &changed, extack);
1116 if (ret)
1117 goto err_vlan_add;
1118 }
1119 out:
1120 return ret;
1121
1122 err_vlan_add:
1123 RCU_INIT_POINTER(p->vlgrp, NULL);
1124 synchronize_rcu();
1125 vlan_tunnel_deinit(vg);
1126 err_tunnel_init:
1127 rhashtable_destroy(&vg->vlan_hash);
1128 err_rhtbl:
1129 err_vlan_enabled:
1130 kfree(vg);
1131
1132 goto out;
1133 }
1134
1135 /* Must be protected by RTNL.
1136 * Must be called with vid in range from 1 to 4094 inclusive.
1137 * changed must be true only if the vlan was created or updated
1138 */
1139 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1140 bool *changed, struct netlink_ext_ack *extack)
1141 {
1142 struct net_bridge_vlan *vlan;
1143 int ret;
1144
1145 ASSERT_RTNL();
1146
1147 *changed = false;
1148 vlan = br_vlan_find(nbp_vlan_group(port), vid);
1149 if (vlan) {
1150 /* Pass the flags to the hardware bridge */
1151 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
1152 if (ret && ret != -EOPNOTSUPP)
1153 return ret;
1154 *changed = __vlan_add_flags(vlan, flags);
1155
1156 return 0;
1157 }
1158
1159 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1160 if (!vlan)
1161 return -ENOMEM;
1162
1163 vlan->vid = vid;
1164 vlan->port = port;
1165 ret = __vlan_add(vlan, flags, extack);
1166 if (ret)
1167 kfree(vlan);
1168 else
1169 *changed = true;
1170
1171 return ret;
1172 }
1173
1174 /* Must be protected by RTNL.
1175 * Must be called with vid in range from 1 to 4094 inclusive.
1176 */
1177 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1178 {
1179 struct net_bridge_vlan *v;
1180
1181 ASSERT_RTNL();
1182
1183 v = br_vlan_find(nbp_vlan_group(port), vid);
1184 if (!v)
1185 return -ENOENT;
1186 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1187 br_fdb_delete_by_port(port->br, port, vid, 0);
1188
1189 return __vlan_del(v);
1190 }
1191
1192 void nbp_vlan_flush(struct net_bridge_port *port)
1193 {
1194 struct net_bridge_vlan_group *vg;
1195
1196 ASSERT_RTNL();
1197
1198 vg = nbp_vlan_group(port);
1199 __vlan_flush(vg);
1200 RCU_INIT_POINTER(port->vlgrp, NULL);
1201 synchronize_rcu();
1202 __vlan_group_free(vg);
1203 }
1204
1205 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1206 struct br_vlan_stats *stats)
1207 {
1208 int i;
1209
1210 memset(stats, 0, sizeof(*stats));
1211 for_each_possible_cpu(i) {
1212 u64 rxpackets, rxbytes, txpackets, txbytes;
1213 struct br_vlan_stats *cpu_stats;
1214 unsigned int start;
1215
1216 cpu_stats = per_cpu_ptr(v->stats, i);
1217 do {
1218 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1219 rxpackets = cpu_stats->rx_packets;
1220 rxbytes = cpu_stats->rx_bytes;
1221 txbytes = cpu_stats->tx_bytes;
1222 txpackets = cpu_stats->tx_packets;
1223 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1224
1225 stats->rx_packets += rxpackets;
1226 stats->rx_bytes += rxbytes;
1227 stats->tx_bytes += txbytes;
1228 stats->tx_packets += txpackets;
1229 }
1230 }
1231
1232 static int __br_vlan_get_pvid(const struct net_device *dev,
1233 struct net_bridge_port *p, u16 *p_pvid)
1234 {
1235 struct net_bridge_vlan_group *vg;
1236
1237 if (p)
1238 vg = nbp_vlan_group(p);
1239 else if (netif_is_bridge_master(dev))
1240 vg = br_vlan_group(netdev_priv(dev));
1241 else
1242 return -EINVAL;
1243
1244 *p_pvid = br_get_pvid(vg);
1245 return 0;
1246 }
1247
1248 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1249 {
1250 ASSERT_RTNL();
1251
1252 return __br_vlan_get_pvid(dev, br_port_get_check_rtnl(dev), p_pvid);
1253 }
1254 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1255
1256 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
1257 {
1258 return __br_vlan_get_pvid(dev, br_port_get_check_rcu(dev), p_pvid);
1259 }
1260 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
1261
1262 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1263 struct bridge_vlan_info *p_vinfo)
1264 {
1265 struct net_bridge_vlan_group *vg;
1266 struct net_bridge_vlan *v;
1267 struct net_bridge_port *p;
1268
1269 ASSERT_RTNL();
1270 p = br_port_get_check_rtnl(dev);
1271 if (p)
1272 vg = nbp_vlan_group(p);
1273 else if (netif_is_bridge_master(dev))
1274 vg = br_vlan_group(netdev_priv(dev));
1275 else
1276 return -EINVAL;
1277
1278 v = br_vlan_find(vg, vid);
1279 if (!v)
1280 return -ENOENT;
1281
1282 p_vinfo->vid = vid;
1283 p_vinfo->flags = v->flags;
1284 if (vid == br_get_pvid(vg))
1285 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1286 return 0;
1287 }
1288 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1289
1290 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1291 {
1292 return is_vlan_dev(dev) &&
1293 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1294 }
1295
1296 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1297 __always_unused void *data)
1298 {
1299 return br_vlan_is_bind_vlan_dev(dev);
1300 }
1301
1302 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1303 {
1304 int found;
1305
1306 rcu_read_lock();
1307 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1308 NULL);
1309 rcu_read_unlock();
1310
1311 return !!found;
1312 }
1313
1314 struct br_vlan_bind_walk_data {
1315 u16 vid;
1316 struct net_device *result;
1317 };
1318
1319 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1320 void *data_in)
1321 {
1322 struct br_vlan_bind_walk_data *data = data_in;
1323 int found = 0;
1324
1325 if (br_vlan_is_bind_vlan_dev(dev) &&
1326 vlan_dev_priv(dev)->vlan_id == data->vid) {
1327 data->result = dev;
1328 found = 1;
1329 }
1330
1331 return found;
1332 }
1333
1334 static struct net_device *
1335 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1336 {
1337 struct br_vlan_bind_walk_data data = {
1338 .vid = vid,
1339 };
1340
1341 rcu_read_lock();
1342 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1343 &data);
1344 rcu_read_unlock();
1345
1346 return data.result;
1347 }
1348
1349 static bool br_vlan_is_dev_up(const struct net_device *dev)
1350 {
1351 return !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1352 }
1353
1354 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1355 struct net_device *vlan_dev)
1356 {
1357 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1358 struct net_bridge_vlan_group *vg;
1359 struct net_bridge_port *p;
1360 bool has_carrier = false;
1361
1362 if (!netif_carrier_ok(br->dev)) {
1363 netif_carrier_off(vlan_dev);
1364 return;
1365 }
1366
1367 list_for_each_entry(p, &br->port_list, list) {
1368 vg = nbp_vlan_group(p);
1369 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1370 has_carrier = true;
1371 break;
1372 }
1373 }
1374
1375 if (has_carrier)
1376 netif_carrier_on(vlan_dev);
1377 else
1378 netif_carrier_off(vlan_dev);
1379 }
1380
1381 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1382 {
1383 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1384 struct net_bridge_vlan *vlan;
1385 struct net_device *vlan_dev;
1386
1387 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1388 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1389 vlan->vid);
1390 if (vlan_dev) {
1391 if (br_vlan_is_dev_up(p->dev)) {
1392 if (netif_carrier_ok(p->br->dev))
1393 netif_carrier_on(vlan_dev);
1394 } else {
1395 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1396 }
1397 }
1398 }
1399 }
1400
1401 static void br_vlan_upper_change(struct net_device *dev,
1402 struct net_device *upper_dev,
1403 bool linking)
1404 {
1405 struct net_bridge *br = netdev_priv(dev);
1406
1407 if (!br_vlan_is_bind_vlan_dev(upper_dev))
1408 return;
1409
1410 if (linking) {
1411 br_vlan_set_vlan_dev_state(br, upper_dev);
1412 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1413 } else {
1414 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1415 br_vlan_has_upper_bind_vlan_dev(dev));
1416 }
1417 }
1418
1419 struct br_vlan_link_state_walk_data {
1420 struct net_bridge *br;
1421 };
1422
1423 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1424 void *data_in)
1425 {
1426 struct br_vlan_link_state_walk_data *data = data_in;
1427
1428 if (br_vlan_is_bind_vlan_dev(vlan_dev))
1429 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1430
1431 return 0;
1432 }
1433
1434 static void br_vlan_link_state_change(struct net_device *dev,
1435 struct net_bridge *br)
1436 {
1437 struct br_vlan_link_state_walk_data data = {
1438 .br = br
1439 };
1440
1441 rcu_read_lock();
1442 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1443 &data);
1444 rcu_read_unlock();
1445 }
1446
1447 /* Must be protected by RTNL. */
1448 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1449 {
1450 struct net_device *vlan_dev;
1451
1452 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1453 return;
1454
1455 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1456 if (vlan_dev)
1457 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1458 }
1459
1460 /* Must be protected by RTNL. */
1461 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr)
1462 {
1463 struct netdev_notifier_changeupper_info *info;
1464 struct net_bridge *br = netdev_priv(dev);
1465 bool changed;
1466 int ret = 0;
1467
1468 switch (event) {
1469 case NETDEV_REGISTER:
1470 ret = br_vlan_add(br, br->default_pvid,
1471 BRIDGE_VLAN_INFO_PVID |
1472 BRIDGE_VLAN_INFO_UNTAGGED |
1473 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1474 break;
1475 case NETDEV_UNREGISTER:
1476 br_vlan_delete(br, br->default_pvid);
1477 break;
1478 case NETDEV_CHANGEUPPER:
1479 info = ptr;
1480 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1481 break;
1482
1483 case NETDEV_CHANGE:
1484 case NETDEV_UP:
1485 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1486 break;
1487 br_vlan_link_state_change(dev, br);
1488 break;
1489 }
1490
1491 return ret;
1492 }
1493
1494 /* Must be protected by RTNL. */
1495 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1496 {
1497 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1498 return;
1499
1500 switch (event) {
1501 case NETDEV_CHANGE:
1502 case NETDEV_DOWN:
1503 case NETDEV_UP:
1504 br_vlan_set_all_vlan_dev_state(p);
1505 break;
1506 }
1507 }
connection oriented routing