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>
8 #include "br_private.h"
9 #include "br_private_tunnel.h"
11 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid);
13 static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg,
16 const struct net_bridge_vlan *vle = ptr;
17 u16 vid = *(u16 *)arg->key;
19 return vle->vid != vid;
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),
27 .max_size = VLAN_N_VID,
28 .obj_cmpfn = br_vlan_cmp,
29 .automatic_shrinking = true,
32 static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid)
34 return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params);
37 static void __vlan_add_pvid(struct net_bridge_vlan_group *vg,
38 const struct net_bridge_vlan *v)
40 if (vg->pvid == v->vid)
44 br_vlan_set_pvid_state(vg, v->state);
48 static void __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
57 /* Update the BRIDGE_VLAN_INFO_PVID and BRIDGE_VLAN_INFO_UNTAGGED flags of @v.
58 * If @commit is false, return just whether the BRIDGE_VLAN_INFO_PVID and
59 * BRIDGE_VLAN_INFO_UNTAGGED bits of @flags would produce any change onto @v.
61 static bool __vlan_flags_update(struct net_bridge_vlan *v, u16 flags,
64 struct net_bridge_vlan_group *vg;
67 if (br_vlan_is_master(v))
68 vg = br_vlan_group(v->br);
70 vg = nbp_vlan_group(v->port);
72 /* check if anything would be changed on commit */
73 change = !!(flags & BRIDGE_VLAN_INFO_PVID) == !!(vg->pvid != v->vid) ||
74 ((flags ^ v->flags) & BRIDGE_VLAN_INFO_UNTAGGED);
79 if (flags & BRIDGE_VLAN_INFO_PVID)
80 __vlan_add_pvid(vg, v);
82 __vlan_delete_pvid(vg, v->vid);
84 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
85 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
87 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
93 static bool __vlan_flags_would_change(struct net_bridge_vlan *v, u16 flags)
95 return __vlan_flags_update(v, flags, false);
98 static void __vlan_flags_commit(struct net_bridge_vlan *v, u16 flags)
100 __vlan_flags_update(v, flags, true);
103 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
104 struct net_bridge_vlan *v, u16 flags,
105 struct netlink_ext_ack *extack)
109 /* Try switchdev op first. In case it is not supported, fallback to
112 err = br_switchdev_port_vlan_add(dev, v->vid, flags, false, extack);
113 if (err == -EOPNOTSUPP)
114 return vlan_vid_add(dev, br->vlan_proto, v->vid);
115 v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV;
119 static void __vlan_add_list(struct net_bridge_vlan *v)
121 struct net_bridge_vlan_group *vg;
122 struct list_head *headp, *hpos;
123 struct net_bridge_vlan *vent;
125 if (br_vlan_is_master(v))
126 vg = br_vlan_group(v->br);
128 vg = nbp_vlan_group(v->port);
130 headp = &vg->vlan_list;
131 list_for_each_prev(hpos, headp) {
132 vent = list_entry(hpos, struct net_bridge_vlan, vlist);
133 if (v->vid >= vent->vid)
136 list_add_rcu(&v->vlist, hpos);
139 static void __vlan_del_list(struct net_bridge_vlan *v)
141 list_del_rcu(&v->vlist);
144 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
145 const struct net_bridge_vlan *v)
149 /* Try switchdev op first. In case it is not supported, fallback to
152 err = br_switchdev_port_vlan_del(dev, v->vid);
153 if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV))
154 vlan_vid_del(dev, br->vlan_proto, v->vid);
155 return err == -EOPNOTSUPP ? 0 : err;
158 /* Returns a master vlan, if it didn't exist it gets created. In all cases
159 * a reference is taken to the master vlan before returning.
161 static struct net_bridge_vlan *
162 br_vlan_get_master(struct net_bridge *br, u16 vid,
163 struct netlink_ext_ack *extack)
165 struct net_bridge_vlan_group *vg;
166 struct net_bridge_vlan *masterv;
168 vg = br_vlan_group(br);
169 masterv = br_vlan_find(vg, vid);
173 /* missing global ctx, create it now */
174 if (br_vlan_add(br, vid, 0, &changed, extack))
176 masterv = br_vlan_find(vg, vid);
177 if (WARN_ON(!masterv))
179 refcount_set(&masterv->refcnt, 1);
182 refcount_inc(&masterv->refcnt);
187 static void br_master_vlan_rcu_free(struct rcu_head *rcu)
189 struct net_bridge_vlan *v;
191 v = container_of(rcu, struct net_bridge_vlan, rcu);
192 WARN_ON(!br_vlan_is_master(v));
193 free_percpu(v->stats);
198 static void br_vlan_put_master(struct net_bridge_vlan *masterv)
200 struct net_bridge_vlan_group *vg;
202 if (!br_vlan_is_master(masterv))
205 vg = br_vlan_group(masterv->br);
206 if (refcount_dec_and_test(&masterv->refcnt)) {
207 rhashtable_remove_fast(&vg->vlan_hash,
208 &masterv->vnode, br_vlan_rht_params);
209 __vlan_del_list(masterv);
210 br_multicast_toggle_one_vlan(masterv, false);
211 br_multicast_ctx_deinit(&masterv->br_mcast_ctx);
212 call_rcu(&masterv->rcu, br_master_vlan_rcu_free);
216 static void nbp_vlan_rcu_free(struct rcu_head *rcu)
218 struct net_bridge_vlan *v;
220 v = container_of(rcu, struct net_bridge_vlan, rcu);
221 WARN_ON(br_vlan_is_master(v));
222 /* if we had per-port stats configured then free them here */
223 if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS)
224 free_percpu(v->stats);
229 static void br_vlan_init_state(struct net_bridge_vlan *v)
231 struct net_bridge *br;
233 if (br_vlan_is_master(v))
238 if (br_opt_get(br, BROPT_MST_ENABLED)) {
239 br_mst_vlan_init_state(v);
243 v->state = BR_STATE_FORWARDING;
247 /* This is the shared VLAN add function which works for both ports and bridge
248 * devices. There are four possible calls to this function in terms of the
250 * 1. vlan is being added on a port (no master flags, global entry exists)
251 * 2. vlan is being added on a bridge (both master and brentry flags)
252 * 3. vlan is being added on a port, but a global entry didn't exist which
253 * is being created right now (master flag set, brentry flag unset), the
254 * global entry is used for global per-vlan features, but not for filtering
255 * 4. same as 3 but with both master and brentry flags set so the entry
256 * will be used for filtering in both the port and the bridge
258 static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
259 struct netlink_ext_ack *extack)
261 struct net_bridge_vlan *masterv = NULL;
262 struct net_bridge_port *p = NULL;
263 struct net_bridge_vlan_group *vg;
264 struct net_device *dev;
265 struct net_bridge *br;
268 if (br_vlan_is_master(v)) {
271 vg = br_vlan_group(br);
276 vg = nbp_vlan_group(p);
280 /* Add VLAN to the device filter if it is supported.
281 * This ensures tagged traffic enters the bridge when
282 * promiscuous mode is disabled by br_manage_promisc().
284 err = __vlan_vid_add(dev, br, v, flags, extack);
288 /* need to work on the master vlan too */
289 if (flags & BRIDGE_VLAN_INFO_MASTER) {
292 err = br_vlan_add(br, v->vid,
293 flags | BRIDGE_VLAN_INFO_BRENTRY,
299 br_vlan_notify(br, NULL, v->vid, 0,
303 masterv = br_vlan_get_master(br, v->vid, extack);
309 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) {
311 netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
316 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
318 v->stats = masterv->stats;
320 br_multicast_port_ctx_init(p, v, &v->port_mcast_ctx);
322 if (br_vlan_should_use(v)) {
323 err = br_switchdev_port_vlan_add(dev, v->vid, flags,
325 if (err && err != -EOPNOTSUPP)
328 br_multicast_ctx_init(br, v, &v->br_mcast_ctx);
329 v->priv_flags |= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
332 /* Add the dev mac and count the vlan only if it's usable */
333 if (br_vlan_should_use(v)) {
334 err = br_fdb_add_local(br, p, dev->dev_addr, v->vid);
336 br_err(br, "failed insert local address into bridge forwarding table\n");
342 /* set the state before publishing */
343 br_vlan_init_state(v);
345 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
351 __vlan_flags_commit(v, flags);
352 br_multicast_toggle_one_vlan(v, true);
355 nbp_vlan_set_vlan_dev_state(p, v->vid);
360 if (br_vlan_should_use(v)) {
361 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
367 __vlan_vid_del(dev, br, v);
369 if (v->stats && masterv->stats != v->stats)
370 free_percpu(v->stats);
373 br_vlan_put_master(masterv);
377 br_switchdev_port_vlan_del(dev, v->vid);
383 static int __vlan_del(struct net_bridge_vlan *v)
385 struct net_bridge_vlan *masterv = v;
386 struct net_bridge_vlan_group *vg;
387 struct net_bridge_port *p = NULL;
390 if (br_vlan_is_master(v)) {
391 vg = br_vlan_group(v->br);
394 vg = nbp_vlan_group(v->port);
398 __vlan_delete_pvid(vg, v->vid);
400 err = __vlan_vid_del(p->dev, p->br, v);
404 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
405 if (err && err != -EOPNOTSUPP)
410 if (br_vlan_should_use(v)) {
411 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
416 vlan_tunnel_info_del(vg, v);
417 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
420 nbp_vlan_set_vlan_dev_state(p, v->vid);
421 br_multicast_toggle_one_vlan(v, false);
422 br_multicast_port_ctx_deinit(&v->port_mcast_ctx);
423 call_rcu(&v->rcu, nbp_vlan_rcu_free);
426 br_vlan_put_master(masterv);
431 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
433 WARN_ON(!list_empty(&vg->vlan_list));
434 rhashtable_destroy(&vg->vlan_hash);
435 vlan_tunnel_deinit(vg);
439 static void __vlan_flush(const struct net_bridge *br,
440 const struct net_bridge_port *p,
441 struct net_bridge_vlan_group *vg)
443 struct net_bridge_vlan *vlan, *tmp;
444 u16 v_start = 0, v_end = 0;
447 __vlan_delete_pvid(vg, vg->pvid);
448 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
449 /* take care of disjoint ranges */
452 } else if (vlan->vid - v_end != 1) {
453 /* found range end, notify and start next one */
454 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
459 err = __vlan_del(vlan);
462 "port %u(%s) failed to delete vlan %d: %pe\n",
463 (unsigned int) p->port_no, p->dev->name,
464 vlan->vid, ERR_PTR(err));
468 /* notify about the last/whole vlan range */
470 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
473 struct sk_buff *br_handle_vlan(struct net_bridge *br,
474 const struct net_bridge_port *p,
475 struct net_bridge_vlan_group *vg,
478 struct pcpu_sw_netstats *stats;
479 struct net_bridge_vlan *v;
482 /* If this packet was not filtered at input, let it pass */
483 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
486 /* At this point, we know that the frame was filtered and contains
487 * a valid vlan id. If the vlan id has untagged flag set,
488 * send untagged; otherwise, send tagged.
490 br_vlan_get_tag(skb, &vid);
491 v = br_vlan_find(vg, vid);
492 /* Vlan entry must be configured at this point. The
493 * only exception is the bridge is set in promisc mode and the
494 * packet is destined for the bridge device. In this case
495 * pass the packet as is.
497 if (!v || !br_vlan_should_use(v)) {
498 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
505 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
506 stats = this_cpu_ptr(v->stats);
507 u64_stats_update_begin(&stats->syncp);
508 u64_stats_add(&stats->tx_bytes, skb->len);
509 u64_stats_inc(&stats->tx_packets);
510 u64_stats_update_end(&stats->syncp);
513 /* If the skb will be sent using forwarding offload, the assumption is
514 * that the switchdev will inject the packet into hardware together
515 * with the bridge VLAN, so that it can be forwarded according to that
516 * VLAN. The switchdev should deal with popping the VLAN header in
517 * hardware on each egress port as appropriate. So only strip the VLAN
518 * header if forwarding offload is not being used.
520 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED &&
521 !br_switchdev_frame_uses_tx_fwd_offload(skb))
522 __vlan_hwaccel_clear_tag(skb);
524 if (p && (p->flags & BR_VLAN_TUNNEL) &&
525 br_handle_egress_vlan_tunnel(skb, v)) {
533 /* Called under RCU */
534 static bool __allowed_ingress(const struct net_bridge *br,
535 struct net_bridge_vlan_group *vg,
536 struct sk_buff *skb, u16 *vid,
538 struct net_bridge_vlan **vlan)
540 struct pcpu_sw_netstats *stats;
541 struct net_bridge_vlan *v;
544 BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
545 /* If vlan tx offload is disabled on bridge device and frame was
546 * sent from vlan device on the bridge device, it does not have
547 * HW accelerated vlan tag.
549 if (unlikely(!skb_vlan_tag_present(skb) &&
550 skb->protocol == br->vlan_proto)) {
551 skb = skb_vlan_untag(skb);
556 if (!br_vlan_get_tag(skb, vid)) {
558 if (skb->vlan_proto != br->vlan_proto) {
559 /* Protocol-mismatch, empty out vlan_tci for new tag */
560 skb_push(skb, ETH_HLEN);
561 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
562 skb_vlan_tag_get(skb));
566 skb_pull(skb, ETH_HLEN);
567 skb_reset_mac_len(skb);
579 u16 pvid = br_get_pvid(vg);
581 /* Frame had a tag with VID 0 or did not have a tag.
582 * See if pvid is set on this port. That tells us which
583 * vlan untagged or priority-tagged traffic belongs to.
588 /* PVID is set on this port. Any untagged or priority-tagged
589 * ingress frame is considered to belong to this vlan.
593 /* Untagged Frame. */
594 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
596 /* Priority-tagged Frame.
597 * At this point, we know that skb->vlan_tci VID
599 * We update only VID field and preserve PCP field.
601 skb->vlan_tci |= pvid;
603 /* if snooping and stats are disabled we can avoid the lookup */
604 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) &&
605 !br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
606 if (*state == BR_STATE_FORWARDING) {
607 *state = br_vlan_get_pvid_state(vg);
608 if (!br_vlan_state_allowed(*state, true))
614 v = br_vlan_find(vg, *vid);
615 if (!v || !br_vlan_should_use(v))
618 if (*state == BR_STATE_FORWARDING) {
619 *state = br_vlan_get_state(v);
620 if (!br_vlan_state_allowed(*state, true))
624 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
625 stats = this_cpu_ptr(v->stats);
626 u64_stats_update_begin(&stats->syncp);
627 u64_stats_add(&stats->rx_bytes, skb->len);
628 u64_stats_inc(&stats->rx_packets);
629 u64_stats_update_end(&stats->syncp);
641 bool br_allowed_ingress(const struct net_bridge *br,
642 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
644 struct net_bridge_vlan **vlan)
646 /* If VLAN filtering is disabled on the bridge, all packets are
650 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
651 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
655 return __allowed_ingress(br, vg, skb, vid, state, vlan);
658 /* Called under RCU. */
659 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
660 const struct sk_buff *skb)
662 const struct net_bridge_vlan *v;
665 /* If this packet was not filtered at input, let it pass */
666 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
669 br_vlan_get_tag(skb, &vid);
670 v = br_vlan_find(vg, vid);
671 if (v && br_vlan_should_use(v) &&
672 br_vlan_state_allowed(br_vlan_get_state(v), false))
678 /* Called under RCU */
679 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
681 struct net_bridge_vlan_group *vg;
682 struct net_bridge *br = p->br;
683 struct net_bridge_vlan *v;
685 /* If filtering was disabled at input, let it pass. */
686 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
689 vg = nbp_vlan_group_rcu(p);
690 if (!vg || !vg->num_vlans)
693 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
697 *vid = br_get_pvid(vg);
699 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true))
705 v = br_vlan_find(vg, *vid);
706 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true))
712 static int br_vlan_add_existing(struct net_bridge *br,
713 struct net_bridge_vlan_group *vg,
714 struct net_bridge_vlan *vlan,
715 u16 flags, bool *changed,
716 struct netlink_ext_ack *extack)
718 bool becomes_brentry = false;
719 bool would_change = false;
722 if (!br_vlan_is_brentry(vlan)) {
723 /* Trying to change flags of non-existent bridge vlan */
724 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY))
727 becomes_brentry = true;
729 would_change = __vlan_flags_would_change(vlan, flags);
732 /* Master VLANs that aren't brentries weren't notified before,
733 * time to notify them now.
735 if (becomes_brentry || would_change) {
736 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags,
737 would_change, extack);
738 if (err && err != -EOPNOTSUPP)
742 if (becomes_brentry) {
743 /* It was only kept for port vlans, now make it real */
744 err = br_fdb_add_local(br, NULL, br->dev->dev_addr, vlan->vid);
746 br_err(br, "failed to insert local address into bridge forwarding table\n");
750 refcount_inc(&vlan->refcnt);
751 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
754 br_multicast_toggle_one_vlan(vlan, true);
757 __vlan_flags_commit(vlan, flags);
764 br_switchdev_port_vlan_del(br->dev, vlan->vid);
768 /* Must be protected by RTNL.
769 * Must be called with vid in range from 1 to 4094 inclusive.
770 * changed must be true only if the vlan was created or updated
772 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
773 struct netlink_ext_ack *extack)
775 struct net_bridge_vlan_group *vg;
776 struct net_bridge_vlan *vlan;
782 vg = br_vlan_group(br);
783 vlan = br_vlan_find(vg, vid);
785 return br_vlan_add_existing(br, vg, vlan, flags, changed,
788 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
792 vlan->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
798 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
799 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
801 if (flags & BRIDGE_VLAN_INFO_BRENTRY)
802 refcount_set(&vlan->refcnt, 1);
803 ret = __vlan_add(vlan, flags, extack);
805 free_percpu(vlan->stats);
814 /* Must be protected by RTNL.
815 * Must be called with vid in range from 1 to 4094 inclusive.
817 int br_vlan_delete(struct net_bridge *br, u16 vid)
819 struct net_bridge_vlan_group *vg;
820 struct net_bridge_vlan *v;
824 vg = br_vlan_group(br);
825 v = br_vlan_find(vg, vid);
826 if (!v || !br_vlan_is_brentry(v))
829 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
830 br_fdb_delete_by_port(br, NULL, vid, 0);
832 vlan_tunnel_info_del(vg, v);
834 return __vlan_del(v);
837 void br_vlan_flush(struct net_bridge *br)
839 struct net_bridge_vlan_group *vg;
843 vg = br_vlan_group(br);
844 __vlan_flush(br, NULL, vg);
845 RCU_INIT_POINTER(br->vlgrp, NULL);
847 __vlan_group_free(vg);
850 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
855 return br_vlan_lookup(&vg->vlan_hash, vid);
858 /* Must be protected by RTNL. */
859 static void recalculate_group_addr(struct net_bridge *br)
861 if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
864 spin_lock_bh(&br->lock);
865 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
866 br->vlan_proto == htons(ETH_P_8021Q)) {
867 /* Bridge Group Address */
868 br->group_addr[5] = 0x00;
869 } else { /* vlan_enabled && ETH_P_8021AD */
870 /* Provider Bridge Group Address */
871 br->group_addr[5] = 0x08;
873 spin_unlock_bh(&br->lock);
876 /* Must be protected by RTNL. */
877 void br_recalculate_fwd_mask(struct net_bridge *br)
879 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
880 br->vlan_proto == htons(ETH_P_8021Q))
881 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
882 else /* vlan_enabled && ETH_P_8021AD */
883 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
884 ~(1u << br->group_addr[5]);
887 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
888 struct netlink_ext_ack *extack)
890 struct switchdev_attr attr = {
892 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
893 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
894 .u.vlan_filtering = val,
898 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
901 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
903 err = switchdev_port_attr_set(br->dev, &attr, extack);
904 if (err && err != -EOPNOTSUPP) {
905 br_opt_toggle(br, BROPT_VLAN_ENABLED, !val);
909 br_manage_promisc(br);
910 recalculate_group_addr(br);
911 br_recalculate_fwd_mask(br);
912 if (!val && br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
913 br_info(br, "vlan filtering disabled, automatically disabling multicast vlan snooping\n");
914 br_multicast_toggle_vlan_snooping(br, false, NULL);
920 bool br_vlan_enabled(const struct net_device *dev)
922 struct net_bridge *br = netdev_priv(dev);
924 return br_opt_get(br, BROPT_VLAN_ENABLED);
926 EXPORT_SYMBOL_GPL(br_vlan_enabled);
928 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
930 struct net_bridge *br = netdev_priv(dev);
932 *p_proto = ntohs(br->vlan_proto);
936 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
938 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
939 struct netlink_ext_ack *extack)
941 struct switchdev_attr attr = {
943 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
944 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
945 .u.vlan_protocol = ntohs(proto),
948 struct net_bridge_port *p;
949 struct net_bridge_vlan *vlan;
950 struct net_bridge_vlan_group *vg;
951 __be16 oldproto = br->vlan_proto;
953 if (br->vlan_proto == proto)
956 err = switchdev_port_attr_set(br->dev, &attr, extack);
957 if (err && err != -EOPNOTSUPP)
960 /* Add VLANs for the new proto to the device filter. */
961 list_for_each_entry(p, &br->port_list, list) {
962 vg = nbp_vlan_group(p);
963 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
964 if (vlan->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)
966 err = vlan_vid_add(p->dev, proto, vlan->vid);
972 br->vlan_proto = proto;
974 recalculate_group_addr(br);
975 br_recalculate_fwd_mask(br);
977 /* Delete VLANs for the old proto from the device filter. */
978 list_for_each_entry(p, &br->port_list, list) {
979 vg = nbp_vlan_group(p);
980 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
981 if (vlan->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)
983 vlan_vid_del(p->dev, oldproto, vlan->vid);
990 attr.u.vlan_protocol = ntohs(oldproto);
991 switchdev_port_attr_set(br->dev, &attr, NULL);
993 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) {
994 if (vlan->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)
996 vlan_vid_del(p->dev, proto, vlan->vid);
999 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1000 vg = nbp_vlan_group(p);
1001 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1002 if (vlan->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)
1004 vlan_vid_del(p->dev, proto, vlan->vid);
1011 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1012 struct netlink_ext_ack *extack)
1014 if (!eth_type_vlan(htons(val)))
1015 return -EPROTONOSUPPORT;
1017 return __br_vlan_set_proto(br, htons(val), extack);
1020 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
1025 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
1034 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
1036 struct net_bridge_port *p;
1038 /* allow to change the option if there are no port vlans configured */
1039 list_for_each_entry(p, &br->port_list, list) {
1040 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1049 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
1058 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
1060 struct net_bridge_vlan *v;
1062 if (vid != vg->pvid)
1065 v = br_vlan_lookup(&vg->vlan_hash, vid);
1066 if (v && br_vlan_should_use(v) &&
1067 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
1073 static void br_vlan_disable_default_pvid(struct net_bridge *br)
1075 struct net_bridge_port *p;
1076 u16 pvid = br->default_pvid;
1078 /* Disable default_pvid on all ports where it is still
1081 if (vlan_default_pvid(br_vlan_group(br), pvid)) {
1082 if (!br_vlan_delete(br, pvid))
1083 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1086 list_for_each_entry(p, &br->port_list, list) {
1087 if (vlan_default_pvid(nbp_vlan_group(p), pvid) &&
1088 !nbp_vlan_delete(p, pvid))
1089 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1092 br->default_pvid = 0;
1095 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1096 struct netlink_ext_ack *extack)
1098 const struct net_bridge_vlan *pvent;
1099 struct net_bridge_vlan_group *vg;
1100 struct net_bridge_port *p;
1101 unsigned long *changed;
1107 br_vlan_disable_default_pvid(br);
1111 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
1115 old_pvid = br->default_pvid;
1117 /* Update default_pvid config only if we do not conflict with
1118 * user configuration.
1120 vg = br_vlan_group(br);
1121 pvent = br_vlan_find(vg, pvid);
1122 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
1123 (!pvent || !br_vlan_should_use(pvent))) {
1124 err = br_vlan_add(br, pvid,
1125 BRIDGE_VLAN_INFO_PVID |
1126 BRIDGE_VLAN_INFO_UNTAGGED |
1127 BRIDGE_VLAN_INFO_BRENTRY,
1132 if (br_vlan_delete(br, old_pvid))
1133 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN);
1134 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN);
1135 __set_bit(0, changed);
1138 list_for_each_entry(p, &br->port_list, list) {
1139 /* Update default_pvid config only if we do not conflict with
1140 * user configuration.
1142 vg = nbp_vlan_group(p);
1144 !vlan_default_pvid(vg, old_pvid)) ||
1145 br_vlan_find(vg, pvid))
1148 err = nbp_vlan_add(p, pvid,
1149 BRIDGE_VLAN_INFO_PVID |
1150 BRIDGE_VLAN_INFO_UNTAGGED,
1154 if (nbp_vlan_delete(p, old_pvid))
1155 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN);
1156 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN);
1157 __set_bit(p->port_no, changed);
1160 br->default_pvid = pvid;
1163 bitmap_free(changed);
1167 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1168 if (!test_bit(p->port_no, changed))
1172 nbp_vlan_add(p, old_pvid,
1173 BRIDGE_VLAN_INFO_PVID |
1174 BRIDGE_VLAN_INFO_UNTAGGED,
1176 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN);
1178 nbp_vlan_delete(p, pvid);
1179 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1182 if (test_bit(0, changed)) {
1184 br_vlan_add(br, old_pvid,
1185 BRIDGE_VLAN_INFO_PVID |
1186 BRIDGE_VLAN_INFO_UNTAGGED |
1187 BRIDGE_VLAN_INFO_BRENTRY,
1189 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN);
1191 br_vlan_delete(br, pvid);
1192 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1197 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1198 struct netlink_ext_ack *extack)
1203 if (val >= VLAN_VID_MASK)
1206 if (pvid == br->default_pvid)
1209 /* Only allow default pvid change when filtering is disabled */
1210 if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1211 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1215 err = __br_vlan_set_default_pvid(br, pvid, extack);
1220 int br_vlan_init(struct net_bridge *br)
1222 struct net_bridge_vlan_group *vg;
1225 vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1228 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1231 ret = vlan_tunnel_init(vg);
1233 goto err_tunnel_init;
1234 INIT_LIST_HEAD(&vg->vlan_list);
1235 br->vlan_proto = htons(ETH_P_8021Q);
1236 br->default_pvid = 1;
1237 rcu_assign_pointer(br->vlgrp, vg);
1243 rhashtable_destroy(&vg->vlan_hash);
1250 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1252 struct switchdev_attr attr = {
1253 .orig_dev = p->br->dev,
1254 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1255 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1256 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1258 struct net_bridge_vlan_group *vg;
1261 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1265 ret = switchdev_port_attr_set(p->dev, &attr, extack);
1266 if (ret && ret != -EOPNOTSUPP)
1267 goto err_vlan_enabled;
1269 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1272 ret = vlan_tunnel_init(vg);
1274 goto err_tunnel_init;
1275 INIT_LIST_HEAD(&vg->vlan_list);
1276 rcu_assign_pointer(p->vlgrp, vg);
1277 if (p->br->default_pvid) {
1280 ret = nbp_vlan_add(p, p->br->default_pvid,
1281 BRIDGE_VLAN_INFO_PVID |
1282 BRIDGE_VLAN_INFO_UNTAGGED,
1286 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN);
1292 RCU_INIT_POINTER(p->vlgrp, NULL);
1294 vlan_tunnel_deinit(vg);
1296 rhashtable_destroy(&vg->vlan_hash);
1304 /* Must be protected by RTNL.
1305 * Must be called with vid in range from 1 to 4094 inclusive.
1306 * changed must be true only if the vlan was created or updated
1308 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1309 bool *changed, struct netlink_ext_ack *extack)
1311 struct net_bridge_vlan *vlan;
1317 vlan = br_vlan_find(nbp_vlan_group(port), vid);
1319 bool would_change = __vlan_flags_would_change(vlan, flags);
1322 /* Pass the flags to the hardware bridge */
1323 ret = br_switchdev_port_vlan_add(port->dev, vid, flags,
1325 if (ret && ret != -EOPNOTSUPP)
1329 __vlan_flags_commit(vlan, flags);
1330 *changed = would_change;
1335 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1341 ret = __vlan_add(vlan, flags, extack);
1350 /* Must be protected by RTNL.
1351 * Must be called with vid in range from 1 to 4094 inclusive.
1353 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1355 struct net_bridge_vlan *v;
1359 v = br_vlan_find(nbp_vlan_group(port), vid);
1362 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1363 br_fdb_delete_by_port(port->br, port, vid, 0);
1365 return __vlan_del(v);
1368 void nbp_vlan_flush(struct net_bridge_port *port)
1370 struct net_bridge_vlan_group *vg;
1374 vg = nbp_vlan_group(port);
1375 __vlan_flush(port->br, port, vg);
1376 RCU_INIT_POINTER(port->vlgrp, NULL);
1378 __vlan_group_free(vg);
1381 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1382 struct pcpu_sw_netstats *stats)
1386 memset(stats, 0, sizeof(*stats));
1387 for_each_possible_cpu(i) {
1388 u64 rxpackets, rxbytes, txpackets, txbytes;
1389 struct pcpu_sw_netstats *cpu_stats;
1392 cpu_stats = per_cpu_ptr(v->stats, i);
1394 start = u64_stats_fetch_begin(&cpu_stats->syncp);
1395 rxpackets = u64_stats_read(&cpu_stats->rx_packets);
1396 rxbytes = u64_stats_read(&cpu_stats->rx_bytes);
1397 txbytes = u64_stats_read(&cpu_stats->tx_bytes);
1398 txpackets = u64_stats_read(&cpu_stats->tx_packets);
1399 } while (u64_stats_fetch_retry(&cpu_stats->syncp, start));
1401 u64_stats_add(&stats->rx_packets, rxpackets);
1402 u64_stats_add(&stats->rx_bytes, rxbytes);
1403 u64_stats_add(&stats->tx_bytes, txbytes);
1404 u64_stats_add(&stats->tx_packets, txpackets);
1408 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1410 struct net_bridge_vlan_group *vg;
1411 struct net_bridge_port *p;
1414 p = br_port_get_check_rtnl(dev);
1416 vg = nbp_vlan_group(p);
1417 else if (netif_is_bridge_master(dev))
1418 vg = br_vlan_group(netdev_priv(dev));
1422 *p_pvid = br_get_pvid(vg);
1425 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1427 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
1429 struct net_bridge_vlan_group *vg;
1430 struct net_bridge_port *p;
1432 p = br_port_get_check_rcu(dev);
1434 vg = nbp_vlan_group_rcu(p);
1435 else if (netif_is_bridge_master(dev))
1436 vg = br_vlan_group_rcu(netdev_priv(dev));
1440 *p_pvid = br_get_pvid(vg);
1443 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
1445 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1446 struct net_device_path_ctx *ctx,
1447 struct net_device_path *path)
1449 struct net_bridge_vlan_group *vg;
1450 int idx = ctx->num_vlans - 1;
1453 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP;
1455 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
1458 vg = br_vlan_group(br);
1461 ctx->vlan[idx].proto == br->vlan_proto) {
1462 vid = ctx->vlan[idx].id;
1464 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_TAG;
1465 vid = br_get_pvid(vg);
1468 path->bridge.vlan_id = vid;
1469 path->bridge.vlan_proto = br->vlan_proto;
1472 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1473 struct net_bridge_port *dst,
1474 struct net_device_path *path)
1476 struct net_bridge_vlan_group *vg;
1477 struct net_bridge_vlan *v;
1479 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
1482 vg = nbp_vlan_group_rcu(dst);
1483 v = br_vlan_find(vg, path->bridge.vlan_id);
1484 if (!v || !br_vlan_should_use(v))
1487 if (!(v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
1490 if (path->bridge.vlan_mode == DEV_PATH_BR_VLAN_TAG)
1491 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP;
1492 else if (v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)
1493 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG_HW;
1495 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG;
1500 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1501 struct bridge_vlan_info *p_vinfo)
1503 struct net_bridge_vlan_group *vg;
1504 struct net_bridge_vlan *v;
1505 struct net_bridge_port *p;
1508 p = br_port_get_check_rtnl(dev);
1510 vg = nbp_vlan_group(p);
1511 else if (netif_is_bridge_master(dev))
1512 vg = br_vlan_group(netdev_priv(dev));
1516 v = br_vlan_find(vg, vid);
1521 p_vinfo->flags = v->flags;
1522 if (vid == br_get_pvid(vg))
1523 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1526 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1528 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid,
1529 struct bridge_vlan_info *p_vinfo)
1531 struct net_bridge_vlan_group *vg;
1532 struct net_bridge_vlan *v;
1533 struct net_bridge_port *p;
1535 p = br_port_get_check_rcu(dev);
1537 vg = nbp_vlan_group_rcu(p);
1538 else if (netif_is_bridge_master(dev))
1539 vg = br_vlan_group_rcu(netdev_priv(dev));
1543 v = br_vlan_find(vg, vid);
1548 p_vinfo->flags = v->flags;
1549 if (vid == br_get_pvid(vg))
1550 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1553 EXPORT_SYMBOL_GPL(br_vlan_get_info_rcu);
1555 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1557 return is_vlan_dev(dev) &&
1558 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1561 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1562 __always_unused struct netdev_nested_priv *priv)
1564 return br_vlan_is_bind_vlan_dev(dev);
1567 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1572 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1579 struct br_vlan_bind_walk_data {
1581 struct net_device *result;
1584 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1585 struct netdev_nested_priv *priv)
1587 struct br_vlan_bind_walk_data *data = priv->data;
1590 if (br_vlan_is_bind_vlan_dev(dev) &&
1591 vlan_dev_priv(dev)->vlan_id == data->vid) {
1599 static struct net_device *
1600 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1602 struct br_vlan_bind_walk_data data = {
1605 struct netdev_nested_priv priv = {
1606 .data = (void *)&data,
1610 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1617 static bool br_vlan_is_dev_up(const struct net_device *dev)
1619 return !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1622 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1623 struct net_device *vlan_dev)
1625 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1626 struct net_bridge_vlan_group *vg;
1627 struct net_bridge_port *p;
1628 bool has_carrier = false;
1630 if (!netif_carrier_ok(br->dev)) {
1631 netif_carrier_off(vlan_dev);
1635 list_for_each_entry(p, &br->port_list, list) {
1636 vg = nbp_vlan_group(p);
1637 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1644 netif_carrier_on(vlan_dev);
1646 netif_carrier_off(vlan_dev);
1649 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1651 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1652 struct net_bridge_vlan *vlan;
1653 struct net_device *vlan_dev;
1655 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1656 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1659 if (br_vlan_is_dev_up(p->dev)) {
1660 if (netif_carrier_ok(p->br->dev))
1661 netif_carrier_on(vlan_dev);
1663 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1669 static void br_vlan_toggle_bridge_binding(struct net_device *br_dev,
1672 struct net_bridge *br = netdev_priv(br_dev);
1675 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1677 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1678 br_vlan_has_upper_bind_vlan_dev(br_dev));
1681 static void br_vlan_upper_change(struct net_device *dev,
1682 struct net_device *upper_dev,
1685 struct net_bridge *br = netdev_priv(dev);
1687 if (!br_vlan_is_bind_vlan_dev(upper_dev))
1690 br_vlan_toggle_bridge_binding(dev, linking);
1692 br_vlan_set_vlan_dev_state(br, upper_dev);
1695 struct br_vlan_link_state_walk_data {
1696 struct net_bridge *br;
1699 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1700 struct netdev_nested_priv *priv)
1702 struct br_vlan_link_state_walk_data *data = priv->data;
1704 if (br_vlan_is_bind_vlan_dev(vlan_dev))
1705 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1710 static void br_vlan_link_state_change(struct net_device *dev,
1711 struct net_bridge *br)
1713 struct br_vlan_link_state_walk_data data = {
1716 struct netdev_nested_priv priv = {
1717 .data = (void *)&data,
1721 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1726 /* Must be protected by RTNL. */
1727 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1729 struct net_device *vlan_dev;
1731 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1734 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1736 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1739 /* Must be protected by RTNL. */
1740 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr)
1742 struct netdev_notifier_changeupper_info *info;
1743 struct net_bridge *br = netdev_priv(dev);
1744 int vlcmd = 0, ret = 0;
1745 bool changed = false;
1748 case NETDEV_REGISTER:
1749 ret = br_vlan_add(br, br->default_pvid,
1750 BRIDGE_VLAN_INFO_PVID |
1751 BRIDGE_VLAN_INFO_UNTAGGED |
1752 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1753 vlcmd = RTM_NEWVLAN;
1755 case NETDEV_UNREGISTER:
1756 changed = !br_vlan_delete(br, br->default_pvid);
1757 vlcmd = RTM_DELVLAN;
1759 case NETDEV_CHANGEUPPER:
1761 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1766 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1768 br_vlan_link_state_change(dev, br);
1772 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd);
1777 void br_vlan_vlan_upper_event(struct net_device *br_dev,
1778 struct net_device *vlan_dev,
1779 unsigned long event)
1781 struct vlan_dev_priv *vlan = vlan_dev_priv(vlan_dev);
1782 struct net_bridge *br = netdev_priv(br_dev);
1783 bool bridge_binding;
1793 bridge_binding = vlan->flags & VLAN_FLAG_BRIDGE_BINDING;
1794 br_vlan_toggle_bridge_binding(br_dev, bridge_binding);
1796 br_vlan_set_vlan_dev_state(br, vlan_dev);
1797 else if (!bridge_binding && netif_carrier_ok(br_dev))
1798 netif_carrier_on(vlan_dev);
1801 /* Must be protected by RTNL. */
1802 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1804 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1811 br_vlan_set_all_vlan_dev_state(p);
1816 static bool br_vlan_stats_fill(struct sk_buff *skb,
1817 const struct net_bridge_vlan *v)
1819 struct pcpu_sw_netstats stats;
1820 struct nlattr *nest;
1822 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS);
1826 br_vlan_get_stats(v, &stats);
1827 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES,
1828 u64_stats_read(&stats.rx_bytes),
1829 BRIDGE_VLANDB_STATS_PAD) ||
1830 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS,
1831 u64_stats_read(&stats.rx_packets),
1832 BRIDGE_VLANDB_STATS_PAD) ||
1833 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES,
1834 u64_stats_read(&stats.tx_bytes),
1835 BRIDGE_VLANDB_STATS_PAD) ||
1836 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS,
1837 u64_stats_read(&stats.tx_packets),
1838 BRIDGE_VLANDB_STATS_PAD))
1841 nla_nest_end(skb, nest);
1846 nla_nest_cancel(skb, nest);
1850 /* v_opts is used to dump the options which must be equal in the whole range */
1851 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range,
1852 const struct net_bridge_vlan *v_opts,
1853 const struct net_bridge_port *p,
1857 struct bridge_vlan_info info;
1858 struct nlattr *nest;
1860 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY);
1864 memset(&info, 0, sizeof(info));
1866 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
1867 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1868 if (flags & BRIDGE_VLAN_INFO_PVID)
1869 info.flags |= BRIDGE_VLAN_INFO_PVID;
1871 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info))
1874 if (vid_range && vid < vid_range &&
1875 !(flags & BRIDGE_VLAN_INFO_PVID) &&
1876 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range))
1880 if (!br_vlan_opts_fill(skb, v_opts, p))
1883 if (dump_stats && !br_vlan_stats_fill(skb, v_opts))
1887 nla_nest_end(skb, nest);
1892 nla_nest_cancel(skb, nest);
1896 static size_t rtnl_vlan_nlmsg_size(void)
1898 return NLMSG_ALIGN(sizeof(struct br_vlan_msg))
1899 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */
1900 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */
1901 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */
1902 + br_vlan_opts_nl_size(); /* bridge vlan options */
1905 void br_vlan_notify(const struct net_bridge *br,
1906 const struct net_bridge_port *p,
1907 u16 vid, u16 vid_range,
1910 struct net_bridge_vlan_group *vg;
1911 struct net_bridge_vlan *v = NULL;
1912 struct br_vlan_msg *bvm;
1913 struct nlmsghdr *nlh;
1914 struct sk_buff *skb;
1920 /* right now notifications are done only with rtnl held */
1924 ifindex = p->dev->ifindex;
1925 vg = nbp_vlan_group(p);
1926 net = dev_net(p->dev);
1928 ifindex = br->dev->ifindex;
1929 vg = br_vlan_group(br);
1930 net = dev_net(br->dev);
1933 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL);
1938 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0);
1941 bvm = nlmsg_data(nlh);
1942 memset(bvm, 0, sizeof(*bvm));
1943 bvm->family = AF_BRIDGE;
1944 bvm->ifindex = ifindex;
1948 /* need to find the vlan due to flags/options */
1949 v = br_vlan_find(vg, vid);
1950 if (!v || !br_vlan_should_use(v))
1954 if (br_get_pvid(vg) == v->vid)
1955 flags |= BRIDGE_VLAN_INFO_PVID;
1963 if (!br_vlan_fill_vids(skb, vid, vid_range, v, p, flags, false))
1966 nlmsg_end(skb, nlh);
1967 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL);
1971 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err);
1976 /* check if v_curr can enter a range ending in range_end */
1977 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1978 const struct net_bridge_vlan *range_end)
1980 return v_curr->vid - range_end->vid == 1 &&
1981 range_end->flags == v_curr->flags &&
1982 br_vlan_opts_eq_range(v_curr, range_end);
1985 static int br_vlan_dump_dev(const struct net_device *dev,
1986 struct sk_buff *skb,
1987 struct netlink_callback *cb,
1990 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL;
1991 bool dump_global = !!(dump_flags & BRIDGE_VLANDB_DUMPF_GLOBAL);
1992 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS);
1993 struct net_bridge_vlan_group *vg;
1994 int idx = 0, s_idx = cb->args[1];
1995 struct nlmsghdr *nlh = NULL;
1996 struct net_bridge_port *p;
1997 struct br_vlan_msg *bvm;
1998 struct net_bridge *br;
2002 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
2005 if (netif_is_bridge_master(dev)) {
2006 br = netdev_priv(dev);
2007 vg = br_vlan_group_rcu(br);
2010 /* global options are dumped only for bridge devices */
2014 p = br_port_get_rcu(dev);
2017 vg = nbp_vlan_group_rcu(p);
2024 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
2025 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI);
2028 bvm = nlmsg_data(nlh);
2029 memset(bvm, 0, sizeof(*bvm));
2030 bvm->family = PF_BRIDGE;
2031 bvm->ifindex = dev->ifindex;
2032 pvid = br_get_pvid(vg);
2034 /* idx must stay at range's beginning until it is filled in */
2035 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
2036 if (!dump_global && !br_vlan_should_use(v))
2050 if (br_vlan_global_opts_can_enter_range(v, range_end))
2052 if (!br_vlan_global_opts_fill(skb, range_start->vid,
2058 /* advance number of filled vlans */
2059 idx += range_end->vid - range_start->vid + 1;
2062 } else if (dump_stats || v->vid == pvid ||
2063 !br_vlan_can_enter_range(v, range_end)) {
2064 u16 vlan_flags = br_vlan_flags(range_start, pvid);
2066 if (!br_vlan_fill_vids(skb, range_start->vid,
2067 range_end->vid, range_start,
2068 p, vlan_flags, dump_stats)) {
2072 /* advance number of filled vlans */
2073 idx += range_end->vid - range_start->vid + 1;
2081 /* err will be 0 and range_start will be set in 3 cases here:
2082 * - first vlan (range_start == range_end)
2083 * - last vlan (range_start == range_end, not in range)
2084 * - last vlan range (range_start != range_end, in range)
2086 if (!err && range_start) {
2088 !br_vlan_global_opts_fill(skb, range_start->vid,
2089 range_end->vid, range_start))
2091 else if (!dump_global &&
2092 !br_vlan_fill_vids(skb, range_start->vid,
2093 range_end->vid, range_start,
2094 p, br_vlan_flags(range_start, pvid),
2099 cb->args[1] = err ? idx : 0;
2101 nlmsg_end(skb, nlh);
2106 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = {
2107 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 },
2110 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb)
2112 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1];
2113 int idx = 0, err = 0, s_idx = cb->args[0];
2114 struct net *net = sock_net(skb->sk);
2115 struct br_vlan_msg *bvm;
2116 struct net_device *dev;
2119 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX,
2120 br_vlan_db_dump_pol, cb->extack);
2124 bvm = nlmsg_data(cb->nlh);
2125 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS])
2126 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]);
2130 dev = dev_get_by_index_rcu(net, bvm->ifindex);
2135 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
2136 /* if the dump completed without an error we return 0 here */
2137 if (err != -EMSGSIZE)
2140 for_each_netdev_rcu(net, dev) {
2144 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
2145 if (err == -EMSGSIZE)
2162 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = {
2163 [BRIDGE_VLANDB_ENTRY_INFO] =
2164 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)),
2165 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 },
2166 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 },
2167 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED },
2168 [BRIDGE_VLANDB_ENTRY_MCAST_ROUTER] = { .type = NLA_U8 },
2169 [BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS] = { .type = NLA_REJECT },
2170 [BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS] = { .type = NLA_U32 },
2171 [BRIDGE_VLANDB_ENTRY_NEIGH_SUPPRESS] = NLA_POLICY_MAX(NLA_U8, 1),
2174 static int br_vlan_rtm_process_one(struct net_device *dev,
2175 const struct nlattr *attr,
2176 int cmd, struct netlink_ext_ack *extack)
2178 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL;
2179 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
2180 bool changed = false, skip_processing = false;
2181 struct net_bridge_vlan_group *vg;
2182 struct net_bridge_port *p = NULL;
2183 int err = 0, cmdmap = 0;
2184 struct net_bridge *br;
2186 if (netif_is_bridge_master(dev)) {
2187 br = netdev_priv(dev);
2188 vg = br_vlan_group(br);
2190 p = br_port_get_rtnl(dev);
2194 vg = nbp_vlan_group(p);
2200 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr,
2201 br_vlan_db_policy, extack);
2205 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) {
2206 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info");
2209 memset(&vrange_end, 0, sizeof(vrange_end));
2211 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
2212 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
2213 BRIDGE_VLAN_INFO_RANGE_END)) {
2214 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls");
2217 if (!br_vlan_valid_id(vinfo->vid, extack))
2220 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) {
2221 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]);
2222 /* validate user-provided flags without RANGE_BEGIN */
2223 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags;
2224 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
2226 /* vinfo_last is the range start, vinfo the range end */
2228 vinfo = &vrange_end;
2230 if (!br_vlan_valid_id(vinfo->vid, extack) ||
2231 !br_vlan_valid_range(vinfo, vinfo_last, extack))
2237 cmdmap = RTM_SETLINK;
2238 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS);
2241 cmdmap = RTM_DELLINK;
2245 if (!skip_processing) {
2246 struct bridge_vlan_info *tmp_last = vinfo_last;
2248 /* br_process_vlan_info may overwrite vinfo_last */
2249 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last,
2252 /* notify first if anything changed */
2254 br_ifinfo_notify(cmdmap, br, p);
2260 /* deal with options */
2261 if (cmd == RTM_NEWVLAN) {
2262 struct net_bridge_vlan *range_start, *range_end;
2265 range_start = br_vlan_find(vg, vinfo_last->vid);
2266 range_end = br_vlan_find(vg, vinfo->vid);
2268 range_start = br_vlan_find(vg, vinfo->vid);
2269 range_end = range_start;
2272 err = br_vlan_process_options(br, p, range_start, range_end,
2279 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh,
2280 struct netlink_ext_ack *extack)
2282 struct net *net = sock_net(skb->sk);
2283 struct br_vlan_msg *bvm;
2284 struct net_device *dev;
2285 struct nlattr *attr;
2289 /* this should validate the header and check for remaining bytes */
2290 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL,
2295 bvm = nlmsg_data(nlh);
2296 dev = __dev_get_by_index(net, bvm->ifindex);
2300 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) {
2301 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port");
2305 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) {
2306 switch (nla_type(attr)) {
2307 case BRIDGE_VLANDB_ENTRY:
2308 err = br_vlan_rtm_process_one(dev, attr,
2312 case BRIDGE_VLANDB_GLOBAL_OPTIONS:
2313 err = br_vlan_rtm_process_global_options(dev, attr,
2326 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process");
2333 static const struct rtnl_msg_handler br_vlan_rtnl_msg_handlers[] = {
2334 {THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, br_vlan_rtm_process, NULL, 0},
2335 {THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, br_vlan_rtm_process, NULL, 0},
2336 {THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, br_vlan_rtm_dump, 0},
2339 int br_vlan_rtnl_init(void)
2341 return rtnl_register_many(br_vlan_rtnl_msg_handlers);
2344 void br_vlan_rtnl_uninit(void)
2346 rtnl_unregister_many(br_vlan_rtnl_msg_handlers);