?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ARM: dma-api: fix max_pfn off-by-one error in __dma_supported()
[linux/fpc-iii.git] / net / bridge / br_vlan.c
blob6b5deca08b89e24b664dfa7230003fbaacc41efb
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,
38 const struct net_bridge_vlan *v)
39 {
40 if (vg->pvid == v->vid)
41 return false;
42
43 smp_wmb();
44 br_vlan_set_pvid_state(vg, v->state);
45 vg->pvid = v->vid;
46
47 return true;
48 }
49
50 static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
51 {
52 if (vg->pvid != vid)
53 return false;
54
55 smp_wmb();
56 vg->pvid = 0;
57
58 return true;
59 }
60
61 /* return true if anything changed, false otherwise */
62 static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
63 {
64 struct net_bridge_vlan_group *vg;
65 u16 old_flags = v->flags;
66 bool ret;
67
68 if (br_vlan_is_master(v))
69 vg = br_vlan_group(v->br);
70 else
71 vg = nbp_vlan_group(v->port);
72
73 if (flags & BRIDGE_VLAN_INFO_PVID)
74 ret = __vlan_add_pvid(vg, v);
75 else
76 ret = __vlan_delete_pvid(vg, v->vid);
77
78 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
79 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
80 else
81 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
82
83 return ret || !!(old_flags ^ v->flags);
84 }
85
86 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
87 struct net_bridge_vlan *v, u16 flags,
88 struct netlink_ext_ack *extack)
89 {
90 int err;
91
92 /* Try switchdev op first. In case it is not supported, fallback to
93 * 8021q add.
94 */
95 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
96 if (err == -EOPNOTSUPP)
97 return vlan_vid_add(dev, br->vlan_proto, v->vid);
98 v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV;
99 return err;
100 }
101
102 static void __vlan_add_list(struct net_bridge_vlan *v)
103 {
104 struct net_bridge_vlan_group *vg;
105 struct list_head *headp, *hpos;
106 struct net_bridge_vlan *vent;
107
108 if (br_vlan_is_master(v))
109 vg = br_vlan_group(v->br);
110 else
111 vg = nbp_vlan_group(v->port);
112
113 headp = &vg->vlan_list;
114 list_for_each_prev(hpos, headp) {
115 vent = list_entry(hpos, struct net_bridge_vlan, vlist);
116 if (v->vid < vent->vid)
117 continue;
118 else
119 break;
120 }
121 list_add_rcu(&v->vlist, hpos);
122 }
123
124 static void __vlan_del_list(struct net_bridge_vlan *v)
125 {
126 list_del_rcu(&v->vlist);
127 }
128
129 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
130 const struct net_bridge_vlan *v)
131 {
132 int err;
133
134 /* Try switchdev op first. In case it is not supported, fallback to
135 * 8021q del.
136 */
137 err = br_switchdev_port_vlan_del(dev, v->vid);
138 if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV))
139 vlan_vid_del(dev, br->vlan_proto, v->vid);
140 return err == -EOPNOTSUPP ? 0 : err;
141 }
142
143 /* Returns a master vlan, if it didn't exist it gets created. In all cases a
144 * a reference is taken to the master vlan before returning.
145 */
146 static struct net_bridge_vlan *
147 br_vlan_get_master(struct net_bridge *br, u16 vid,
148 struct netlink_ext_ack *extack)
149 {
150 struct net_bridge_vlan_group *vg;
151 struct net_bridge_vlan *masterv;
152
153 vg = br_vlan_group(br);
154 masterv = br_vlan_find(vg, vid);
155 if (!masterv) {
156 bool changed;
157
158 /* missing global ctx, create it now */
159 if (br_vlan_add(br, vid, 0, &changed, extack))
160 return NULL;
161 masterv = br_vlan_find(vg, vid);
162 if (WARN_ON(!masterv))
163 return NULL;
164 refcount_set(&masterv->refcnt, 1);
165 return masterv;
166 }
167 refcount_inc(&masterv->refcnt);
168
169 return masterv;
170 }
171
172 static void br_master_vlan_rcu_free(struct rcu_head *rcu)
173 {
174 struct net_bridge_vlan *v;
175
176 v = container_of(rcu, struct net_bridge_vlan, rcu);
177 WARN_ON(!br_vlan_is_master(v));
178 free_percpu(v->stats);
179 v->stats = NULL;
180 kfree(v);
181 }
182
183 static void br_vlan_put_master(struct net_bridge_vlan *masterv)
184 {
185 struct net_bridge_vlan_group *vg;
186
187 if (!br_vlan_is_master(masterv))
188 return;
189
190 vg = br_vlan_group(masterv->br);
191 if (refcount_dec_and_test(&masterv->refcnt)) {
192 rhashtable_remove_fast(&vg->vlan_hash,
193 &masterv->vnode, br_vlan_rht_params);
194 __vlan_del_list(masterv);
195 call_rcu(&masterv->rcu, br_master_vlan_rcu_free);
196 }
197 }
198
199 static void nbp_vlan_rcu_free(struct rcu_head *rcu)
200 {
201 struct net_bridge_vlan *v;
202
203 v = container_of(rcu, struct net_bridge_vlan, rcu);
204 WARN_ON(br_vlan_is_master(v));
205 /* if we had per-port stats configured then free them here */
206 if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS)
207 free_percpu(v->stats);
208 v->stats = NULL;
209 kfree(v);
210 }
211
212 /* This is the shared VLAN add function which works for both ports and bridge
213 * devices. There are four possible calls to this function in terms of the
214 * vlan entry type:
215 * 1. vlan is being added on a port (no master flags, global entry exists)
216 * 2. vlan is being added on a bridge (both master and brentry flags)
217 * 3. vlan is being added on a port, but a global entry didn't exist which
218 * is being created right now (master flag set, brentry flag unset), the
219 * global entry is used for global per-vlan features, but not for filtering
220 * 4. same as 3 but with both master and brentry flags set so the entry
221 * will be used for filtering in both the port and the bridge
222 */
223 static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
224 struct netlink_ext_ack *extack)
225 {
226 struct net_bridge_vlan *masterv = NULL;
227 struct net_bridge_port *p = NULL;
228 struct net_bridge_vlan_group *vg;
229 struct net_device *dev;
230 struct net_bridge *br;
231 int err;
232
233 if (br_vlan_is_master(v)) {
234 br = v->br;
235 dev = br->dev;
236 vg = br_vlan_group(br);
237 } else {
238 p = v->port;
239 br = p->br;
240 dev = p->dev;
241 vg = nbp_vlan_group(p);
242 }
243
244 if (p) {
245 /* Add VLAN to the device filter if it is supported.
246 * This ensures tagged traffic enters the bridge when
247 * promiscuous mode is disabled by br_manage_promisc().
248 */
249 err = __vlan_vid_add(dev, br, v, flags, extack);
250 if (err)
251 goto out;
252
253 /* need to work on the master vlan too */
254 if (flags & BRIDGE_VLAN_INFO_MASTER) {
255 bool changed;
256
257 err = br_vlan_add(br, v->vid,
258 flags | BRIDGE_VLAN_INFO_BRENTRY,
259 &changed, extack);
260 if (err)
261 goto out_filt;
262
263 if (changed)
264 br_vlan_notify(br, NULL, v->vid, 0,
265 RTM_NEWVLAN);
266 }
267
268 masterv = br_vlan_get_master(br, v->vid, extack);
269 if (!masterv)
270 goto out_filt;
271 v->brvlan = masterv;
272 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) {
273 v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
274 if (!v->stats) {
275 err = -ENOMEM;
276 goto out_filt;
277 }
278 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
279 } else {
280 v->stats = masterv->stats;
281 }
282 } else {
283 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
284 if (err && err != -EOPNOTSUPP)
285 goto out;
286 }
287
288 /* Add the dev mac and count the vlan only if it's usable */
289 if (br_vlan_should_use(v)) {
290 err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
291 if (err) {
292 br_err(br, "failed insert local address into bridge forwarding table\n");
293 goto out_filt;
294 }
295 vg->num_vlans++;
296 }
297
298 /* set the state before publishing */
299 v->state = BR_STATE_FORWARDING;
300
301 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
302 br_vlan_rht_params);
303 if (err)
304 goto out_fdb_insert;
305
306 __vlan_add_list(v);
307 __vlan_add_flags(v, flags);
308
309 if (p)
310 nbp_vlan_set_vlan_dev_state(p, v->vid);
311 out:
312 return err;
313
314 out_fdb_insert:
315 if (br_vlan_should_use(v)) {
316 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
317 vg->num_vlans--;
318 }
319
320 out_filt:
321 if (p) {
322 __vlan_vid_del(dev, br, v);
323 if (masterv) {
324 if (v->stats && masterv->stats != v->stats)
325 free_percpu(v->stats);
326 v->stats = NULL;
327
328 br_vlan_put_master(masterv);
329 v->brvlan = NULL;
330 }
331 } else {
332 br_switchdev_port_vlan_del(dev, v->vid);
333 }
334
335 goto out;
336 }
337
338 static int __vlan_del(struct net_bridge_vlan *v)
339 {
340 struct net_bridge_vlan *masterv = v;
341 struct net_bridge_vlan_group *vg;
342 struct net_bridge_port *p = NULL;
343 int err = 0;
344
345 if (br_vlan_is_master(v)) {
346 vg = br_vlan_group(v->br);
347 } else {
348 p = v->port;
349 vg = nbp_vlan_group(v->port);
350 masterv = v->brvlan;
351 }
352
353 __vlan_delete_pvid(vg, v->vid);
354 if (p) {
355 err = __vlan_vid_del(p->dev, p->br, v);
356 if (err)
357 goto out;
358 } else {
359 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
360 if (err && err != -EOPNOTSUPP)
361 goto out;
362 err = 0;
363 }
364
365 if (br_vlan_should_use(v)) {
366 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
367 vg->num_vlans--;
368 }
369
370 if (masterv != v) {
371 vlan_tunnel_info_del(vg, v);
372 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
373 br_vlan_rht_params);
374 __vlan_del_list(v);
375 nbp_vlan_set_vlan_dev_state(p, v->vid);
376 call_rcu(&v->rcu, nbp_vlan_rcu_free);
377 }
378
379 br_vlan_put_master(masterv);
380 out:
381 return err;
382 }
383
384 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
385 {
386 WARN_ON(!list_empty(&vg->vlan_list));
387 rhashtable_destroy(&vg->vlan_hash);
388 vlan_tunnel_deinit(vg);
389 kfree(vg);
390 }
391
392 static void __vlan_flush(const struct net_bridge *br,
393 const struct net_bridge_port *p,
394 struct net_bridge_vlan_group *vg)
395 {
396 struct net_bridge_vlan *vlan, *tmp;
397 u16 v_start = 0, v_end = 0;
398
399 __vlan_delete_pvid(vg, vg->pvid);
400 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
401 /* take care of disjoint ranges */
402 if (!v_start) {
403 v_start = vlan->vid;
404 } else if (vlan->vid - v_end != 1) {
405 /* found range end, notify and start next one */
406 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
407 v_start = vlan->vid;
408 }
409 v_end = vlan->vid;
410
411 __vlan_del(vlan);
412 }
413
414 /* notify about the last/whole vlan range */
415 if (v_start)
416 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
417 }
418
419 struct sk_buff *br_handle_vlan(struct net_bridge *br,
420 const struct net_bridge_port *p,
421 struct net_bridge_vlan_group *vg,
422 struct sk_buff *skb)
423 {
424 struct br_vlan_stats *stats;
425 struct net_bridge_vlan *v;
426 u16 vid;
427
428 /* If this packet was not filtered at input, let it pass */
429 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
430 goto out;
431
432 /* At this point, we know that the frame was filtered and contains
433 * a valid vlan id. If the vlan id has untagged flag set,
434 * send untagged; otherwise, send tagged.
435 */
436 br_vlan_get_tag(skb, &vid);
437 v = br_vlan_find(vg, vid);
438 /* Vlan entry must be configured at this point. The
439 * only exception is the bridge is set in promisc mode and the
440 * packet is destined for the bridge device. In this case
441 * pass the packet as is.
442 */
443 if (!v || !br_vlan_should_use(v)) {
444 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
445 goto out;
446 } else {
447 kfree_skb(skb);
448 return NULL;
449 }
450 }
451 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
452 stats = this_cpu_ptr(v->stats);
453 u64_stats_update_begin(&stats->syncp);
454 stats->tx_bytes += skb->len;
455 stats->tx_packets++;
456 u64_stats_update_end(&stats->syncp);
457 }
458
459 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
460 __vlan_hwaccel_clear_tag(skb);
461
462 if (p && (p->flags & BR_VLAN_TUNNEL) &&
463 br_handle_egress_vlan_tunnel(skb, v)) {
464 kfree_skb(skb);
465 return NULL;
466 }
467 out:
468 return skb;
469 }
470
471 /* Called under RCU */
472 static bool __allowed_ingress(const struct net_bridge *br,
473 struct net_bridge_vlan_group *vg,
474 struct sk_buff *skb, u16 *vid,
475 u8 *state)
476 {
477 struct br_vlan_stats *stats;
478 struct net_bridge_vlan *v;
479 bool tagged;
480
481 BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
482 /* If vlan tx offload is disabled on bridge device and frame was
483 * sent from vlan device on the bridge device, it does not have
484 * HW accelerated vlan tag.
485 */
486 if (unlikely(!skb_vlan_tag_present(skb) &&
487 skb->protocol == br->vlan_proto)) {
488 skb = skb_vlan_untag(skb);
489 if (unlikely(!skb))
490 return false;
491 }
492
493 if (!br_vlan_get_tag(skb, vid)) {
494 /* Tagged frame */
495 if (skb->vlan_proto != br->vlan_proto) {
496 /* Protocol-mismatch, empty out vlan_tci for new tag */
497 skb_push(skb, ETH_HLEN);
498 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
499 skb_vlan_tag_get(skb));
500 if (unlikely(!skb))
501 return false;
502
503 skb_pull(skb, ETH_HLEN);
504 skb_reset_mac_len(skb);
505 *vid = 0;
506 tagged = false;
507 } else {
508 tagged = true;
509 }
510 } else {
511 /* Untagged frame */
512 tagged = false;
513 }
514
515 if (!*vid) {
516 u16 pvid = br_get_pvid(vg);
517
518 /* Frame had a tag with VID 0 or did not have a tag.
519 * See if pvid is set on this port. That tells us which
520 * vlan untagged or priority-tagged traffic belongs to.
521 */
522 if (!pvid)
523 goto drop;
524
525 /* PVID is set on this port. Any untagged or priority-tagged
526 * ingress frame is considered to belong to this vlan.
527 */
528 *vid = pvid;
529 if (likely(!tagged))
530 /* Untagged Frame. */
531 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
532 else
533 /* Priority-tagged Frame.
534 * At this point, we know that skb->vlan_tci VID
535 * field was 0.
536 * We update only VID field and preserve PCP field.
537 */
538 skb->vlan_tci |= pvid;
539
540 /* if stats are disabled we can avoid the lookup */
541 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
542 if (*state == BR_STATE_FORWARDING) {
543 *state = br_vlan_get_pvid_state(vg);
544 return br_vlan_state_allowed(*state, true);
545 } else {
546 return true;
547 }
548 }
549 }
550 v = br_vlan_find(vg, *vid);
551 if (!v || !br_vlan_should_use(v))
552 goto drop;
553
554 if (*state == BR_STATE_FORWARDING) {
555 *state = br_vlan_get_state(v);
556 if (!br_vlan_state_allowed(*state, true))
557 goto drop;
558 }
559
560 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
561 stats = this_cpu_ptr(v->stats);
562 u64_stats_update_begin(&stats->syncp);
563 stats->rx_bytes += skb->len;
564 stats->rx_packets++;
565 u64_stats_update_end(&stats->syncp);
566 }
567
568 return true;
569
570 drop:
571 kfree_skb(skb);
572 return false;
573 }
574
575 bool br_allowed_ingress(const struct net_bridge *br,
576 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
577 u16 *vid, u8 *state)
578 {
579 /* If VLAN filtering is disabled on the bridge, all packets are
580 * permitted.
581 */
582 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
583 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
584 return true;
585 }
586
587 return __allowed_ingress(br, vg, skb, vid, state);
588 }
589
590 /* Called under RCU. */
591 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
592 const struct sk_buff *skb)
593 {
594 const struct net_bridge_vlan *v;
595 u16 vid;
596
597 /* If this packet was not filtered at input, let it pass */
598 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
599 return true;
600
601 br_vlan_get_tag(skb, &vid);
602 v = br_vlan_find(vg, vid);
603 if (v && br_vlan_should_use(v) &&
604 br_vlan_state_allowed(br_vlan_get_state(v), false))
605 return true;
606
607 return false;
608 }
609
610 /* Called under RCU */
611 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
612 {
613 struct net_bridge_vlan_group *vg;
614 struct net_bridge *br = p->br;
615 struct net_bridge_vlan *v;
616
617 /* If filtering was disabled at input, let it pass. */
618 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
619 return true;
620
621 vg = nbp_vlan_group_rcu(p);
622 if (!vg || !vg->num_vlans)
623 return false;
624
625 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
626 *vid = 0;
627
628 if (!*vid) {
629 *vid = br_get_pvid(vg);
630 if (!*vid ||
631 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true))
632 return false;
633
634 return true;
635 }
636
637 v = br_vlan_find(vg, *vid);
638 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true))
639 return true;
640
641 return false;
642 }
643
644 static int br_vlan_add_existing(struct net_bridge *br,
645 struct net_bridge_vlan_group *vg,
646 struct net_bridge_vlan *vlan,
647 u16 flags, bool *changed,
648 struct netlink_ext_ack *extack)
649 {
650 int err;
651
652 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
653 if (err && err != -EOPNOTSUPP)
654 return err;
655
656 if (!br_vlan_is_brentry(vlan)) {
657 /* Trying to change flags of non-existent bridge vlan */
658 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
659 err = -EINVAL;
660 goto err_flags;
661 }
662 /* It was only kept for port vlans, now make it real */
663 err = br_fdb_insert(br, NULL, br->dev->dev_addr,
664 vlan->vid);
665 if (err) {
666 br_err(br, "failed to insert local address into bridge forwarding table\n");
667 goto err_fdb_insert;
668 }
669
670 refcount_inc(&vlan->refcnt);
671 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
672 vg->num_vlans++;
673 *changed = true;
674 }
675
676 if (__vlan_add_flags(vlan, flags))
677 *changed = true;
678
679 return 0;
680
681 err_fdb_insert:
682 err_flags:
683 br_switchdev_port_vlan_del(br->dev, vlan->vid);
684 return err;
685 }
686
687 /* Must be protected by RTNL.
688 * Must be called with vid in range from 1 to 4094 inclusive.
689 * changed must be true only if the vlan was created or updated
690 */
691 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
692 struct netlink_ext_ack *extack)
693 {
694 struct net_bridge_vlan_group *vg;
695 struct net_bridge_vlan *vlan;
696 int ret;
697
698 ASSERT_RTNL();
699
700 *changed = false;
701 vg = br_vlan_group(br);
702 vlan = br_vlan_find(vg, vid);
703 if (vlan)
704 return br_vlan_add_existing(br, vg, vlan, flags, changed,
705 extack);
706
707 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
708 if (!vlan)
709 return -ENOMEM;
710
711 vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
712 if (!vlan->stats) {
713 kfree(vlan);
714 return -ENOMEM;
715 }
716 vlan->vid = vid;
717 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
718 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
719 vlan->br = br;
720 if (flags & BRIDGE_VLAN_INFO_BRENTRY)
721 refcount_set(&vlan->refcnt, 1);
722 ret = __vlan_add(vlan, flags, extack);
723 if (ret) {
724 free_percpu(vlan->stats);
725 kfree(vlan);
726 } else {
727 *changed = true;
728 }
729
730 return ret;
731 }
732
733 /* Must be protected by RTNL.
734 * Must be called with vid in range from 1 to 4094 inclusive.
735 */
736 int br_vlan_delete(struct net_bridge *br, u16 vid)
737 {
738 struct net_bridge_vlan_group *vg;
739 struct net_bridge_vlan *v;
740
741 ASSERT_RTNL();
742
743 vg = br_vlan_group(br);
744 v = br_vlan_find(vg, vid);
745 if (!v || !br_vlan_is_brentry(v))
746 return -ENOENT;
747
748 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
749 br_fdb_delete_by_port(br, NULL, vid, 0);
750
751 vlan_tunnel_info_del(vg, v);
752
753 return __vlan_del(v);
754 }
755
756 void br_vlan_flush(struct net_bridge *br)
757 {
758 struct net_bridge_vlan_group *vg;
759
760 ASSERT_RTNL();
761
762 vg = br_vlan_group(br);
763 __vlan_flush(br, NULL, vg);
764 RCU_INIT_POINTER(br->vlgrp, NULL);
765 synchronize_rcu();
766 __vlan_group_free(vg);
767 }
768
769 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
770 {
771 if (!vg)
772 return NULL;
773
774 return br_vlan_lookup(&vg->vlan_hash, vid);
775 }
776
777 /* Must be protected by RTNL. */
778 static void recalculate_group_addr(struct net_bridge *br)
779 {
780 if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
781 return;
782
783 spin_lock_bh(&br->lock);
784 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
785 br->vlan_proto == htons(ETH_P_8021Q)) {
786 /* Bridge Group Address */
787 br->group_addr[5] = 0x00;
788 } else { /* vlan_enabled && ETH_P_8021AD */
789 /* Provider Bridge Group Address */
790 br->group_addr[5] = 0x08;
791 }
792 spin_unlock_bh(&br->lock);
793 }
794
795 /* Must be protected by RTNL. */
796 void br_recalculate_fwd_mask(struct net_bridge *br)
797 {
798 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
799 br->vlan_proto == htons(ETH_P_8021Q))
800 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
801 else /* vlan_enabled && ETH_P_8021AD */
802 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
803 ~(1u << br->group_addr[5]);
804 }
805
806 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
807 {
808 struct switchdev_attr attr = {
809 .orig_dev = br->dev,
810 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
811 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
812 .u.vlan_filtering = val,
813 };
814 int err;
815
816 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
817 return 0;
818
819 err = switchdev_port_attr_set(br->dev, &attr);
820 if (err && err != -EOPNOTSUPP)
821 return err;
822
823 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
824 br_manage_promisc(br);
825 recalculate_group_addr(br);
826 br_recalculate_fwd_mask(br);
827
828 return 0;
829 }
830
831 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
832 {
833 return __br_vlan_filter_toggle(br, val);
834 }
835
836 bool br_vlan_enabled(const struct net_device *dev)
837 {
838 struct net_bridge *br = netdev_priv(dev);
839
840 return br_opt_get(br, BROPT_VLAN_ENABLED);
841 }
842 EXPORT_SYMBOL_GPL(br_vlan_enabled);
843
844 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
845 {
846 struct net_bridge *br = netdev_priv(dev);
847
848 *p_proto = ntohs(br->vlan_proto);
849
850 return 0;
851 }
852 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
853
854 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
855 {
856 int err = 0;
857 struct net_bridge_port *p;
858 struct net_bridge_vlan *vlan;
859 struct net_bridge_vlan_group *vg;
860 __be16 oldproto;
861
862 if (br->vlan_proto == proto)
863 return 0;
864
865 /* Add VLANs for the new proto to the device filter. */
866 list_for_each_entry(p, &br->port_list, list) {
867 vg = nbp_vlan_group(p);
868 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
869 err = vlan_vid_add(p->dev, proto, vlan->vid);
870 if (err)
871 goto err_filt;
872 }
873 }
874
875 oldproto = br->vlan_proto;
876 br->vlan_proto = proto;
877
878 recalculate_group_addr(br);
879 br_recalculate_fwd_mask(br);
880
881 /* Delete VLANs for the old proto from the device filter. */
882 list_for_each_entry(p, &br->port_list, list) {
883 vg = nbp_vlan_group(p);
884 list_for_each_entry(vlan, &vg->vlan_list, vlist)
885 vlan_vid_del(p->dev, oldproto, vlan->vid);
886 }
887
888 return 0;
889
890 err_filt:
891 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
892 vlan_vid_del(p->dev, proto, vlan->vid);
893
894 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
895 vg = nbp_vlan_group(p);
896 list_for_each_entry(vlan, &vg->vlan_list, vlist)
897 vlan_vid_del(p->dev, proto, vlan->vid);
898 }
899
900 return err;
901 }
902
903 int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
904 {
905 if (val != ETH_P_8021Q && val != ETH_P_8021AD)
906 return -EPROTONOSUPPORT;
907
908 return __br_vlan_set_proto(br, htons(val));
909 }
910
911 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
912 {
913 switch (val) {
914 case 0:
915 case 1:
916 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
917 break;
918 default:
919 return -EINVAL;
920 }
921
922 return 0;
923 }
924
925 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
926 {
927 struct net_bridge_port *p;
928
929 /* allow to change the option if there are no port vlans configured */
930 list_for_each_entry(p, &br->port_list, list) {
931 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
932
933 if (vg->num_vlans)
934 return -EBUSY;
935 }
936
937 switch (val) {
938 case 0:
939 case 1:
940 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
941 break;
942 default:
943 return -EINVAL;
944 }
945
946 return 0;
947 }
948
949 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
950 {
951 struct net_bridge_vlan *v;
952
953 if (vid != vg->pvid)
954 return false;
955
956 v = br_vlan_lookup(&vg->vlan_hash, vid);
957 if (v && br_vlan_should_use(v) &&
958 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
959 return true;
960
961 return false;
962 }
963
964 static void br_vlan_disable_default_pvid(struct net_bridge *br)
965 {
966 struct net_bridge_port *p;
967 u16 pvid = br->default_pvid;
968
969 /* Disable default_pvid on all ports where it is still
970 * configured.
971 */
972 if (vlan_default_pvid(br_vlan_group(br), pvid)) {
973 if (!br_vlan_delete(br, pvid))
974 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
975 }
976
977 list_for_each_entry(p, &br->port_list, list) {
978 if (vlan_default_pvid(nbp_vlan_group(p), pvid) &&
979 !nbp_vlan_delete(p, pvid))
980 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
981 }
982
983 br->default_pvid = 0;
984 }
985
986 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
987 struct netlink_ext_ack *extack)
988 {
989 const struct net_bridge_vlan *pvent;
990 struct net_bridge_vlan_group *vg;
991 struct net_bridge_port *p;
992 unsigned long *changed;
993 bool vlchange;
994 u16 old_pvid;
995 int err = 0;
996
997 if (!pvid) {
998 br_vlan_disable_default_pvid(br);
999 return 0;
1000 }
1001
1002 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
1003 if (!changed)
1004 return -ENOMEM;
1005
1006 old_pvid = br->default_pvid;
1007
1008 /* Update default_pvid config only if we do not conflict with
1009 * user configuration.
1010 */
1011 vg = br_vlan_group(br);
1012 pvent = br_vlan_find(vg, pvid);
1013 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
1014 (!pvent || !br_vlan_should_use(pvent))) {
1015 err = br_vlan_add(br, pvid,
1016 BRIDGE_VLAN_INFO_PVID |
1017 BRIDGE_VLAN_INFO_UNTAGGED |
1018 BRIDGE_VLAN_INFO_BRENTRY,
1019 &vlchange, extack);
1020 if (err)
1021 goto out;
1022
1023 if (br_vlan_delete(br, old_pvid))
1024 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN);
1025 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN);
1026 set_bit(0, changed);
1027 }
1028
1029 list_for_each_entry(p, &br->port_list, list) {
1030 /* Update default_pvid config only if we do not conflict with
1031 * user configuration.
1032 */
1033 vg = nbp_vlan_group(p);
1034 if ((old_pvid &&
1035 !vlan_default_pvid(vg, old_pvid)) ||
1036 br_vlan_find(vg, pvid))
1037 continue;
1038
1039 err = nbp_vlan_add(p, pvid,
1040 BRIDGE_VLAN_INFO_PVID |
1041 BRIDGE_VLAN_INFO_UNTAGGED,
1042 &vlchange, extack);
1043 if (err)
1044 goto err_port;
1045 if (nbp_vlan_delete(p, old_pvid))
1046 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN);
1047 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN);
1048 set_bit(p->port_no, changed);
1049 }
1050
1051 br->default_pvid = pvid;
1052
1053 out:
1054 bitmap_free(changed);
1055 return err;
1056
1057 err_port:
1058 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1059 if (!test_bit(p->port_no, changed))
1060 continue;
1061
1062 if (old_pvid) {
1063 nbp_vlan_add(p, old_pvid,
1064 BRIDGE_VLAN_INFO_PVID |
1065 BRIDGE_VLAN_INFO_UNTAGGED,
1066 &vlchange, NULL);
1067 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN);
1068 }
1069 nbp_vlan_delete(p, pvid);
1070 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1071 }
1072
1073 if (test_bit(0, changed)) {
1074 if (old_pvid) {
1075 br_vlan_add(br, old_pvid,
1076 BRIDGE_VLAN_INFO_PVID |
1077 BRIDGE_VLAN_INFO_UNTAGGED |
1078 BRIDGE_VLAN_INFO_BRENTRY,
1079 &vlchange, NULL);
1080 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN);
1081 }
1082 br_vlan_delete(br, pvid);
1083 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1084 }
1085 goto out;
1086 }
1087
1088 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
1089 {
1090 u16 pvid = val;
1091 int err = 0;
1092
1093 if (val >= VLAN_VID_MASK)
1094 return -EINVAL;
1095
1096 if (pvid == br->default_pvid)
1097 goto out;
1098
1099 /* Only allow default pvid change when filtering is disabled */
1100 if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1101 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1102 err = -EPERM;
1103 goto out;
1104 }
1105 err = __br_vlan_set_default_pvid(br, pvid, NULL);
1106 out:
1107 return err;
1108 }
1109
1110 int br_vlan_init(struct net_bridge *br)
1111 {
1112 struct net_bridge_vlan_group *vg;
1113 int ret = -ENOMEM;
1114
1115 vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1116 if (!vg)
1117 goto out;
1118 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1119 if (ret)
1120 goto err_rhtbl;
1121 ret = vlan_tunnel_init(vg);
1122 if (ret)
1123 goto err_tunnel_init;
1124 INIT_LIST_HEAD(&vg->vlan_list);
1125 br->vlan_proto = htons(ETH_P_8021Q);
1126 br->default_pvid = 1;
1127 rcu_assign_pointer(br->vlgrp, vg);
1128
1129 out:
1130 return ret;
1131
1132 err_tunnel_init:
1133 rhashtable_destroy(&vg->vlan_hash);
1134 err_rhtbl:
1135 kfree(vg);
1136
1137 goto out;
1138 }
1139
1140 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1141 {
1142 struct switchdev_attr attr = {
1143 .orig_dev = p->br->dev,
1144 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1145 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1146 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1147 };
1148 struct net_bridge_vlan_group *vg;
1149 int ret = -ENOMEM;
1150
1151 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1152 if (!vg)
1153 goto out;
1154
1155 ret = switchdev_port_attr_set(p->dev, &attr);
1156 if (ret && ret != -EOPNOTSUPP)
1157 goto err_vlan_enabled;
1158
1159 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1160 if (ret)
1161 goto err_rhtbl;
1162 ret = vlan_tunnel_init(vg);
1163 if (ret)
1164 goto err_tunnel_init;
1165 INIT_LIST_HEAD(&vg->vlan_list);
1166 rcu_assign_pointer(p->vlgrp, vg);
1167 if (p->br->default_pvid) {
1168 bool changed;
1169
1170 ret = nbp_vlan_add(p, p->br->default_pvid,
1171 BRIDGE_VLAN_INFO_PVID |
1172 BRIDGE_VLAN_INFO_UNTAGGED,
1173 &changed, extack);
1174 if (ret)
1175 goto err_vlan_add;
1176 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN);
1177 }
1178 out:
1179 return ret;
1180
1181 err_vlan_add:
1182 RCU_INIT_POINTER(p->vlgrp, NULL);
1183 synchronize_rcu();
1184 vlan_tunnel_deinit(vg);
1185 err_tunnel_init:
1186 rhashtable_destroy(&vg->vlan_hash);
1187 err_rhtbl:
1188 err_vlan_enabled:
1189 kfree(vg);
1190
1191 goto out;
1192 }
1193
1194 /* Must be protected by RTNL.
1195 * Must be called with vid in range from 1 to 4094 inclusive.
1196 * changed must be true only if the vlan was created or updated
1197 */
1198 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1199 bool *changed, struct netlink_ext_ack *extack)
1200 {
1201 struct net_bridge_vlan *vlan;
1202 int ret;
1203
1204 ASSERT_RTNL();
1205
1206 *changed = false;
1207 vlan = br_vlan_find(nbp_vlan_group(port), vid);
1208 if (vlan) {
1209 /* Pass the flags to the hardware bridge */
1210 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
1211 if (ret && ret != -EOPNOTSUPP)
1212 return ret;
1213 *changed = __vlan_add_flags(vlan, flags);
1214
1215 return 0;
1216 }
1217
1218 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1219 if (!vlan)
1220 return -ENOMEM;
1221
1222 vlan->vid = vid;
1223 vlan->port = port;
1224 ret = __vlan_add(vlan, flags, extack);
1225 if (ret)
1226 kfree(vlan);
1227 else
1228 *changed = true;
1229
1230 return ret;
1231 }
1232
1233 /* Must be protected by RTNL.
1234 * Must be called with vid in range from 1 to 4094 inclusive.
1235 */
1236 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1237 {
1238 struct net_bridge_vlan *v;
1239
1240 ASSERT_RTNL();
1241
1242 v = br_vlan_find(nbp_vlan_group(port), vid);
1243 if (!v)
1244 return -ENOENT;
1245 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1246 br_fdb_delete_by_port(port->br, port, vid, 0);
1247
1248 return __vlan_del(v);
1249 }
1250
1251 void nbp_vlan_flush(struct net_bridge_port *port)
1252 {
1253 struct net_bridge_vlan_group *vg;
1254
1255 ASSERT_RTNL();
1256
1257 vg = nbp_vlan_group(port);
1258 __vlan_flush(port->br, port, vg);
1259 RCU_INIT_POINTER(port->vlgrp, NULL);
1260 synchronize_rcu();
1261 __vlan_group_free(vg);
1262 }
1263
1264 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1265 struct br_vlan_stats *stats)
1266 {
1267 int i;
1268
1269 memset(stats, 0, sizeof(*stats));
1270 for_each_possible_cpu(i) {
1271 u64 rxpackets, rxbytes, txpackets, txbytes;
1272 struct br_vlan_stats *cpu_stats;
1273 unsigned int start;
1274
1275 cpu_stats = per_cpu_ptr(v->stats, i);
1276 do {
1277 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1278 rxpackets = cpu_stats->rx_packets;
1279 rxbytes = cpu_stats->rx_bytes;
1280 txbytes = cpu_stats->tx_bytes;
1281 txpackets = cpu_stats->tx_packets;
1282 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1283
1284 stats->rx_packets += rxpackets;
1285 stats->rx_bytes += rxbytes;
1286 stats->tx_bytes += txbytes;
1287 stats->tx_packets += txpackets;
1288 }
1289 }
1290
1291 static int __br_vlan_get_pvid(const struct net_device *dev,
1292 struct net_bridge_port *p, u16 *p_pvid)
1293 {
1294 struct net_bridge_vlan_group *vg;
1295
1296 if (p)
1297 vg = nbp_vlan_group(p);
1298 else if (netif_is_bridge_master(dev))
1299 vg = br_vlan_group(netdev_priv(dev));
1300 else
1301 return -EINVAL;
1302
1303 *p_pvid = br_get_pvid(vg);
1304 return 0;
1305 }
1306
1307 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1308 {
1309 ASSERT_RTNL();
1310
1311 return __br_vlan_get_pvid(dev, br_port_get_check_rtnl(dev), p_pvid);
1312 }
1313 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1314
1315 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
1316 {
1317 return __br_vlan_get_pvid(dev, br_port_get_check_rcu(dev), p_pvid);
1318 }
1319 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
1320
1321 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1322 struct bridge_vlan_info *p_vinfo)
1323 {
1324 struct net_bridge_vlan_group *vg;
1325 struct net_bridge_vlan *v;
1326 struct net_bridge_port *p;
1327
1328 ASSERT_RTNL();
1329 p = br_port_get_check_rtnl(dev);
1330 if (p)
1331 vg = nbp_vlan_group(p);
1332 else if (netif_is_bridge_master(dev))
1333 vg = br_vlan_group(netdev_priv(dev));
1334 else
1335 return -EINVAL;
1336
1337 v = br_vlan_find(vg, vid);
1338 if (!v)
1339 return -ENOENT;
1340
1341 p_vinfo->vid = vid;
1342 p_vinfo->flags = v->flags;
1343 if (vid == br_get_pvid(vg))
1344 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1345 return 0;
1346 }
1347 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1348
1349 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1350 {
1351 return is_vlan_dev(dev) &&
1352 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1353 }
1354
1355 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1356 __always_unused void *data)
1357 {
1358 return br_vlan_is_bind_vlan_dev(dev);
1359 }
1360
1361 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1362 {
1363 int found;
1364
1365 rcu_read_lock();
1366 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1367 NULL);
1368 rcu_read_unlock();
1369
1370 return !!found;
1371 }
1372
1373 struct br_vlan_bind_walk_data {
1374 u16 vid;
1375 struct net_device *result;
1376 };
1377
1378 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1379 void *data_in)
1380 {
1381 struct br_vlan_bind_walk_data *data = data_in;
1382 int found = 0;
1383
1384 if (br_vlan_is_bind_vlan_dev(dev) &&
1385 vlan_dev_priv(dev)->vlan_id == data->vid) {
1386 data->result = dev;
1387 found = 1;
1388 }
1389
1390 return found;
1391 }
1392
1393 static struct net_device *
1394 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1395 {
1396 struct br_vlan_bind_walk_data data = {
1397 .vid = vid,
1398 };
1399
1400 rcu_read_lock();
1401 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1402 &data);
1403 rcu_read_unlock();
1404
1405 return data.result;
1406 }
1407
1408 static bool br_vlan_is_dev_up(const struct net_device *dev)
1409 {
1410 return !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1411 }
1412
1413 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1414 struct net_device *vlan_dev)
1415 {
1416 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1417 struct net_bridge_vlan_group *vg;
1418 struct net_bridge_port *p;
1419 bool has_carrier = false;
1420
1421 if (!netif_carrier_ok(br->dev)) {
1422 netif_carrier_off(vlan_dev);
1423 return;
1424 }
1425
1426 list_for_each_entry(p, &br->port_list, list) {
1427 vg = nbp_vlan_group(p);
1428 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1429 has_carrier = true;
1430 break;
1431 }
1432 }
1433
1434 if (has_carrier)
1435 netif_carrier_on(vlan_dev);
1436 else
1437 netif_carrier_off(vlan_dev);
1438 }
1439
1440 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1441 {
1442 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1443 struct net_bridge_vlan *vlan;
1444 struct net_device *vlan_dev;
1445
1446 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1447 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1448 vlan->vid);
1449 if (vlan_dev) {
1450 if (br_vlan_is_dev_up(p->dev)) {
1451 if (netif_carrier_ok(p->br->dev))
1452 netif_carrier_on(vlan_dev);
1453 } else {
1454 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1455 }
1456 }
1457 }
1458 }
1459
1460 static void br_vlan_upper_change(struct net_device *dev,
1461 struct net_device *upper_dev,
1462 bool linking)
1463 {
1464 struct net_bridge *br = netdev_priv(dev);
1465
1466 if (!br_vlan_is_bind_vlan_dev(upper_dev))
1467 return;
1468
1469 if (linking) {
1470 br_vlan_set_vlan_dev_state(br, upper_dev);
1471 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1472 } else {
1473 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1474 br_vlan_has_upper_bind_vlan_dev(dev));
1475 }
1476 }
1477
1478 struct br_vlan_link_state_walk_data {
1479 struct net_bridge *br;
1480 };
1481
1482 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1483 void *data_in)
1484 {
1485 struct br_vlan_link_state_walk_data *data = data_in;
1486
1487 if (br_vlan_is_bind_vlan_dev(vlan_dev))
1488 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1489
1490 return 0;
1491 }
1492
1493 static void br_vlan_link_state_change(struct net_device *dev,
1494 struct net_bridge *br)
1495 {
1496 struct br_vlan_link_state_walk_data data = {
1497 .br = br
1498 };
1499
1500 rcu_read_lock();
1501 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1502 &data);
1503 rcu_read_unlock();
1504 }
1505
1506 /* Must be protected by RTNL. */
1507 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1508 {
1509 struct net_device *vlan_dev;
1510
1511 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1512 return;
1513
1514 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1515 if (vlan_dev)
1516 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1517 }
1518
1519 /* Must be protected by RTNL. */
1520 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr)
1521 {
1522 struct netdev_notifier_changeupper_info *info;
1523 struct net_bridge *br = netdev_priv(dev);
1524 int vlcmd = 0, ret = 0;
1525 bool changed = false;
1526
1527 switch (event) {
1528 case NETDEV_REGISTER:
1529 ret = br_vlan_add(br, br->default_pvid,
1530 BRIDGE_VLAN_INFO_PVID |
1531 BRIDGE_VLAN_INFO_UNTAGGED |
1532 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1533 vlcmd = RTM_NEWVLAN;
1534 break;
1535 case NETDEV_UNREGISTER:
1536 changed = !br_vlan_delete(br, br->default_pvid);
1537 vlcmd = RTM_DELVLAN;
1538 break;
1539 case NETDEV_CHANGEUPPER:
1540 info = ptr;
1541 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1542 break;
1543
1544 case NETDEV_CHANGE:
1545 case NETDEV_UP:
1546 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1547 break;
1548 br_vlan_link_state_change(dev, br);
1549 break;
1550 }
1551 if (changed)
1552 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd);
1553
1554 return ret;
1555 }
1556
1557 /* Must be protected by RTNL. */
1558 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1559 {
1560 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1561 return;
1562
1563 switch (event) {
1564 case NETDEV_CHANGE:
1565 case NETDEV_DOWN:
1566 case NETDEV_UP:
1567 br_vlan_set_all_vlan_dev_state(p);
1568 break;
1569 }
1570 }
1571
1572 /* v_opts is used to dump the options which must be equal in the whole range */
1573 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range,
1574 const struct net_bridge_vlan *v_opts,
1575 u16 flags)
1576 {
1577 struct bridge_vlan_info info;
1578 struct nlattr *nest;
1579
1580 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY);
1581 if (!nest)
1582 return false;
1583
1584 memset(&info, 0, sizeof(info));
1585 info.vid = vid;
1586 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
1587 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1588 if (flags & BRIDGE_VLAN_INFO_PVID)
1589 info.flags |= BRIDGE_VLAN_INFO_PVID;
1590
1591 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info))
1592 goto out_err;
1593
1594 if (vid_range && vid < vid_range &&
1595 !(flags & BRIDGE_VLAN_INFO_PVID) &&
1596 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range))
1597 goto out_err;
1598
1599 if (v_opts && !br_vlan_opts_fill(skb, v_opts))
1600 goto out_err;
1601
1602 nla_nest_end(skb, nest);
1603
1604 return true;
1605
1606 out_err:
1607 nla_nest_cancel(skb, nest);
1608 return false;
1609 }
1610
1611 static size_t rtnl_vlan_nlmsg_size(void)
1612 {
1613 return NLMSG_ALIGN(sizeof(struct br_vlan_msg))
1614 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */
1615 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */
1616 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */
1617 + br_vlan_opts_nl_size(); /* bridge vlan options */
1618 }
1619
1620 void br_vlan_notify(const struct net_bridge *br,
1621 const struct net_bridge_port *p,
1622 u16 vid, u16 vid_range,
1623 int cmd)
1624 {
1625 struct net_bridge_vlan_group *vg;
1626 struct net_bridge_vlan *v = NULL;
1627 struct br_vlan_msg *bvm;
1628 struct nlmsghdr *nlh;
1629 struct sk_buff *skb;
1630 int err = -ENOBUFS;
1631 struct net *net;
1632 u16 flags = 0;
1633 int ifindex;
1634
1635 /* right now notifications are done only with rtnl held */
1636 ASSERT_RTNL();
1637
1638 if (p) {
1639 ifindex = p->dev->ifindex;
1640 vg = nbp_vlan_group(p);
1641 net = dev_net(p->dev);
1642 } else {
1643 ifindex = br->dev->ifindex;
1644 vg = br_vlan_group(br);
1645 net = dev_net(br->dev);
1646 }
1647
1648 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL);
1649 if (!skb)
1650 goto out_err;
1651
1652 err = -EMSGSIZE;
1653 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0);
1654 if (!nlh)
1655 goto out_err;
1656 bvm = nlmsg_data(nlh);
1657 memset(bvm, 0, sizeof(*bvm));
1658 bvm->family = AF_BRIDGE;
1659 bvm->ifindex = ifindex;
1660
1661 switch (cmd) {
1662 case RTM_NEWVLAN:
1663 /* need to find the vlan due to flags/options */
1664 v = br_vlan_find(vg, vid);
1665 if (!v || !br_vlan_should_use(v))
1666 goto out_kfree;
1667
1668 flags = v->flags;
1669 if (br_get_pvid(vg) == v->vid)
1670 flags |= BRIDGE_VLAN_INFO_PVID;
1671 break;
1672 case RTM_DELVLAN:
1673 break;
1674 default:
1675 goto out_kfree;
1676 }
1677
1678 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags))
1679 goto out_err;
1680
1681 nlmsg_end(skb, nlh);
1682 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL);
1683 return;
1684
1685 out_err:
1686 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err);
1687 out_kfree:
1688 kfree_skb(skb);
1689 }
1690
1691 /* check if v_curr can enter a range ending in range_end */
1692 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1693 const struct net_bridge_vlan *range_end)
1694 {
1695 return v_curr->vid - range_end->vid == 1 &&
1696 range_end->flags == v_curr->flags &&
1697 br_vlan_opts_eq(v_curr, range_end);
1698 }
1699
1700 static int br_vlan_dump_dev(const struct net_device *dev,
1701 struct sk_buff *skb,
1702 struct netlink_callback *cb)
1703 {
1704 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL;
1705 struct net_bridge_vlan_group *vg;
1706 int idx = 0, s_idx = cb->args[1];
1707 struct nlmsghdr *nlh = NULL;
1708 struct net_bridge_port *p;
1709 struct br_vlan_msg *bvm;
1710 struct net_bridge *br;
1711 int err = 0;
1712 u16 pvid;
1713
1714 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
1715 return -EINVAL;
1716
1717 if (netif_is_bridge_master(dev)) {
1718 br = netdev_priv(dev);
1719 vg = br_vlan_group_rcu(br);
1720 p = NULL;
1721 } else {
1722 p = br_port_get_rcu(dev);
1723 if (WARN_ON(!p))
1724 return -EINVAL;
1725 vg = nbp_vlan_group_rcu(p);
1726 br = p->br;
1727 }
1728
1729 if (!vg)
1730 return 0;
1731
1732 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1733 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI);
1734 if (!nlh)
1735 return -EMSGSIZE;
1736 bvm = nlmsg_data(nlh);
1737 memset(bvm, 0, sizeof(*bvm));
1738 bvm->family = PF_BRIDGE;
1739 bvm->ifindex = dev->ifindex;
1740 pvid = br_get_pvid(vg);
1741
1742 /* idx must stay at range's beginning until it is filled in */
1743 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
1744 if (!br_vlan_should_use(v))
1745 continue;
1746 if (idx < s_idx) {
1747 idx++;
1748 continue;
1749 }
1750
1751 if (!range_start) {
1752 range_start = v;
1753 range_end = v;
1754 continue;
1755 }
1756
1757 if (v->vid == pvid || !br_vlan_can_enter_range(v, range_end)) {
1758 u16 flags = br_vlan_flags(range_start, pvid);
1759
1760 if (!br_vlan_fill_vids(skb, range_start->vid,
1761 range_end->vid, range_start,
1762 flags)) {
1763 err = -EMSGSIZE;
1764 break;
1765 }
1766 /* advance number of filled vlans */
1767 idx += range_end->vid - range_start->vid + 1;
1768
1769 range_start = v;
1770 }
1771 range_end = v;
1772 }
1773
1774 /* err will be 0 and range_start will be set in 3 cases here:
1775 * - first vlan (range_start == range_end)
1776 * - last vlan (range_start == range_end, not in range)
1777 * - last vlan range (range_start != range_end, in range)
1778 */
1779 if (!err && range_start &&
1780 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid,
1781 range_start, br_vlan_flags(range_start, pvid)))
1782 err = -EMSGSIZE;
1783
1784 cb->args[1] = err ? idx : 0;
1785
1786 nlmsg_end(skb, nlh);
1787
1788 return err;
1789 }
1790
1791 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb)
1792 {
1793 int idx = 0, err = 0, s_idx = cb->args[0];
1794 struct net *net = sock_net(skb->sk);
1795 struct br_vlan_msg *bvm;
1796 struct net_device *dev;
1797
1798 err = nlmsg_parse(cb->nlh, sizeof(*bvm), NULL, 0, NULL, cb->extack);
1799 if (err < 0)
1800 return err;
1801
1802 bvm = nlmsg_data(cb->nlh);
1803
1804 rcu_read_lock();
1805 if (bvm->ifindex) {
1806 dev = dev_get_by_index_rcu(net, bvm->ifindex);
1807 if (!dev) {
1808 err = -ENODEV;
1809 goto out_err;
1810 }
1811 err = br_vlan_dump_dev(dev, skb, cb);
1812 if (err && err != -EMSGSIZE)
1813 goto out_err;
1814 } else {
1815 for_each_netdev_rcu(net, dev) {
1816 if (idx < s_idx)
1817 goto skip;
1818
1819 err = br_vlan_dump_dev(dev, skb, cb);
1820 if (err == -EMSGSIZE)
1821 break;
1822 skip:
1823 idx++;
1824 }
1825 }
1826 cb->args[0] = idx;
1827 rcu_read_unlock();
1828
1829 return skb->len;
1830
1831 out_err:
1832 rcu_read_unlock();
1833
1834 return err;
1835 }
1836
1837 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = {
1838 [BRIDGE_VLANDB_ENTRY_INFO] = { .type = NLA_EXACT_LEN,
1839 .len = sizeof(struct bridge_vlan_info) },
1840 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 },
1841 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 },
1842 };
1843
1844 static int br_vlan_rtm_process_one(struct net_device *dev,
1845 const struct nlattr *attr,
1846 int cmd, struct netlink_ext_ack *extack)
1847 {
1848 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL;
1849 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
1850 bool changed = false, skip_processing = false;
1851 struct net_bridge_vlan_group *vg;
1852 struct net_bridge_port *p = NULL;
1853 int err = 0, cmdmap = 0;
1854 struct net_bridge *br;
1855
1856 if (netif_is_bridge_master(dev)) {
1857 br = netdev_priv(dev);
1858 vg = br_vlan_group(br);
1859 } else {
1860 p = br_port_get_rtnl(dev);
1861 if (WARN_ON(!p))
1862 return -ENODEV;
1863 br = p->br;
1864 vg = nbp_vlan_group(p);
1865 }
1866
1867 if (WARN_ON(!vg))
1868 return -ENODEV;
1869
1870 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr,
1871 br_vlan_db_policy, extack);
1872 if (err)
1873 return err;
1874
1875 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) {
1876 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info");
1877 return -EINVAL;
1878 }
1879 memset(&vrange_end, 0, sizeof(vrange_end));
1880
1881 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
1882 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
1883 BRIDGE_VLAN_INFO_RANGE_END)) {
1884 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls");
1885 return -EINVAL;
1886 }
1887 if (!br_vlan_valid_id(vinfo->vid, extack))
1888 return -EINVAL;
1889
1890 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) {
1891 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]);
1892 /* validate user-provided flags without RANGE_BEGIN */
1893 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags;
1894 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1895
1896 /* vinfo_last is the range start, vinfo the range end */
1897 vinfo_last = vinfo;
1898 vinfo = &vrange_end;
1899
1900 if (!br_vlan_valid_id(vinfo->vid, extack) ||
1901 !br_vlan_valid_range(vinfo, vinfo_last, extack))
1902 return -EINVAL;
1903 }
1904
1905 switch (cmd) {
1906 case RTM_NEWVLAN:
1907 cmdmap = RTM_SETLINK;
1908 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS);
1909 break;
1910 case RTM_DELVLAN:
1911 cmdmap = RTM_DELLINK;
1912 break;
1913 }
1914
1915 if (!skip_processing) {
1916 struct bridge_vlan_info *tmp_last = vinfo_last;
1917
1918 /* br_process_vlan_info may overwrite vinfo_last */
1919 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last,
1920 &changed, extack);
1921
1922 /* notify first if anything changed */
1923 if (changed)
1924 br_ifinfo_notify(cmdmap, br, p);
1925
1926 if (err)
1927 return err;
1928 }
1929
1930 /* deal with options */
1931 if (cmd == RTM_NEWVLAN) {
1932 struct net_bridge_vlan *range_start, *range_end;
1933
1934 if (vinfo_last) {
1935 range_start = br_vlan_find(vg, vinfo_last->vid);
1936 range_end = br_vlan_find(vg, vinfo->vid);
1937 } else {
1938 range_start = br_vlan_find(vg, vinfo->vid);
1939 range_end = range_start;
1940 }
1941
1942 err = br_vlan_process_options(br, p, range_start, range_end,
1943 tb, extack);
1944 }
1945
1946 return err;
1947 }
1948
1949 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh,
1950 struct netlink_ext_ack *extack)
1951 {
1952 struct net *net = sock_net(skb->sk);
1953 struct br_vlan_msg *bvm;
1954 struct net_device *dev;
1955 struct nlattr *attr;
1956 int err, vlans = 0;
1957 int rem;
1958
1959 /* this should validate the header and check for remaining bytes */
1960 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL,
1961 extack);
1962 if (err < 0)
1963 return err;
1964
1965 bvm = nlmsg_data(nlh);
1966 dev = __dev_get_by_index(net, bvm->ifindex);
1967 if (!dev)
1968 return -ENODEV;
1969
1970 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) {
1971 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port");
1972 return -EINVAL;
1973 }
1974
1975 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) {
1976 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY)
1977 continue;
1978
1979 vlans++;
1980 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type,
1981 extack);
1982 if (err)
1983 break;
1984 }
1985 if (!vlans) {
1986 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process");
1987 err = -EINVAL;
1988 }
1989
1990 return err;
1991 }
1992
1993 void br_vlan_rtnl_init(void)
1994 {
1995 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL,
1996 br_vlan_rtm_dump, 0);
1997 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN,
1998 br_vlan_rtm_process, NULL, 0);
1999 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN,
2000 br_vlan_rtm_process, NULL, 0);
2001 }
2002
2003 void br_vlan_rtnl_uninit(void)
2004 {
2005 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN);
2006 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN);
2007 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN);
2008 }
Linux with added FPC-III support