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 bool __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);
50 static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
61 /* return true if anything changed, false otherwise */
62 static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
64 struct net_bridge_vlan_group *vg;
65 u16 old_flags = v->flags;
68 if (br_vlan_is_master(v))
69 vg = br_vlan_group(v->br);
71 vg = nbp_vlan_group(v->port);
73 if (flags & BRIDGE_VLAN_INFO_PVID)
74 ret = __vlan_add_pvid(vg, v);
76 ret = __vlan_delete_pvid(vg, v->vid);
78 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
79 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
81 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
83 return ret || !!(old_flags ^ v->flags);
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)
92 /* Try switchdev op first. In case it is not supported, fallback to
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;
102 static void __vlan_add_list(struct net_bridge_vlan *v)
104 struct net_bridge_vlan_group *vg;
105 struct list_head *headp, *hpos;
106 struct net_bridge_vlan *vent;
108 if (br_vlan_is_master(v))
109 vg = br_vlan_group(v->br);
111 vg = nbp_vlan_group(v->port);
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)
121 list_add_rcu(&v->vlist, hpos);
124 static void __vlan_del_list(struct net_bridge_vlan *v)
126 list_del_rcu(&v->vlist);
129 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
130 const struct net_bridge_vlan *v)
134 /* Try switchdev op first. In case it is not supported, fallback to
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;
143 /* Returns a master vlan, if it didn't exist it gets created. In all cases
144 * a reference is taken to the master vlan before returning.
146 static struct net_bridge_vlan *
147 br_vlan_get_master(struct net_bridge *br, u16 vid,
148 struct netlink_ext_ack *extack)
150 struct net_bridge_vlan_group *vg;
151 struct net_bridge_vlan *masterv;
153 vg = br_vlan_group(br);
154 masterv = br_vlan_find(vg, vid);
158 /* missing global ctx, create it now */
159 if (br_vlan_add(br, vid, 0, &changed, extack))
161 masterv = br_vlan_find(vg, vid);
162 if (WARN_ON(!masterv))
164 refcount_set(&masterv->refcnt, 1);
167 refcount_inc(&masterv->refcnt);
172 static void br_master_vlan_rcu_free(struct rcu_head *rcu)
174 struct net_bridge_vlan *v;
176 v = container_of(rcu, struct net_bridge_vlan, rcu);
177 WARN_ON(!br_vlan_is_master(v));
178 free_percpu(v->stats);
183 static void br_vlan_put_master(struct net_bridge_vlan *masterv)
185 struct net_bridge_vlan_group *vg;
187 if (!br_vlan_is_master(masterv))
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);
199 static void nbp_vlan_rcu_free(struct rcu_head *rcu)
201 struct net_bridge_vlan *v;
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);
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
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
223 static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
224 struct netlink_ext_ack *extack)
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;
233 if (br_vlan_is_master(v)) {
236 vg = br_vlan_group(br);
241 vg = nbp_vlan_group(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().
249 err = __vlan_vid_add(dev, br, v, flags, extack);
253 /* need to work on the master vlan too */
254 if (flags & BRIDGE_VLAN_INFO_MASTER) {
257 err = br_vlan_add(br, v->vid,
258 flags | BRIDGE_VLAN_INFO_BRENTRY,
264 br_vlan_notify(br, NULL, v->vid, 0,
268 masterv = br_vlan_get_master(br, v->vid, extack);
274 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) {
275 v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
280 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
282 v->stats = masterv->stats;
285 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
286 if (err && err != -EOPNOTSUPP)
290 /* Add the dev mac and count the vlan only if it's usable */
291 if (br_vlan_should_use(v)) {
292 err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
294 br_err(br, "failed insert local address into bridge forwarding table\n");
300 /* set the state before publishing */
301 v->state = BR_STATE_FORWARDING;
303 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
309 __vlan_add_flags(v, flags);
312 nbp_vlan_set_vlan_dev_state(p, v->vid);
317 if (br_vlan_should_use(v)) {
318 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
324 __vlan_vid_del(dev, br, v);
326 if (v->stats && masterv->stats != v->stats)
327 free_percpu(v->stats);
330 br_vlan_put_master(masterv);
334 br_switchdev_port_vlan_del(dev, v->vid);
340 static int __vlan_del(struct net_bridge_vlan *v)
342 struct net_bridge_vlan *masterv = v;
343 struct net_bridge_vlan_group *vg;
344 struct net_bridge_port *p = NULL;
347 if (br_vlan_is_master(v)) {
348 vg = br_vlan_group(v->br);
351 vg = nbp_vlan_group(v->port);
355 __vlan_delete_pvid(vg, v->vid);
357 err = __vlan_vid_del(p->dev, p->br, v);
361 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
362 if (err && err != -EOPNOTSUPP)
367 if (br_vlan_should_use(v)) {
368 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
373 vlan_tunnel_info_del(vg, v);
374 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
377 nbp_vlan_set_vlan_dev_state(p, v->vid);
378 call_rcu(&v->rcu, nbp_vlan_rcu_free);
381 br_vlan_put_master(masterv);
386 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
388 WARN_ON(!list_empty(&vg->vlan_list));
389 rhashtable_destroy(&vg->vlan_hash);
390 vlan_tunnel_deinit(vg);
394 static void __vlan_flush(const struct net_bridge *br,
395 const struct net_bridge_port *p,
396 struct net_bridge_vlan_group *vg)
398 struct net_bridge_vlan *vlan, *tmp;
399 u16 v_start = 0, v_end = 0;
401 __vlan_delete_pvid(vg, vg->pvid);
402 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
403 /* take care of disjoint ranges */
406 } else if (vlan->vid - v_end != 1) {
407 /* found range end, notify and start next one */
408 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
416 /* notify about the last/whole vlan range */
418 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
421 struct sk_buff *br_handle_vlan(struct net_bridge *br,
422 const struct net_bridge_port *p,
423 struct net_bridge_vlan_group *vg,
426 struct br_vlan_stats *stats;
427 struct net_bridge_vlan *v;
430 /* If this packet was not filtered at input, let it pass */
431 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
434 /* At this point, we know that the frame was filtered and contains
435 * a valid vlan id. If the vlan id has untagged flag set,
436 * send untagged; otherwise, send tagged.
438 br_vlan_get_tag(skb, &vid);
439 v = br_vlan_find(vg, vid);
440 /* Vlan entry must be configured at this point. The
441 * only exception is the bridge is set in promisc mode and the
442 * packet is destined for the bridge device. In this case
443 * pass the packet as is.
445 if (!v || !br_vlan_should_use(v)) {
446 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
453 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
454 stats = this_cpu_ptr(v->stats);
455 u64_stats_update_begin(&stats->syncp);
456 stats->tx_bytes += skb->len;
458 u64_stats_update_end(&stats->syncp);
461 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
462 __vlan_hwaccel_clear_tag(skb);
464 if (p && (p->flags & BR_VLAN_TUNNEL) &&
465 br_handle_egress_vlan_tunnel(skb, v)) {
473 /* Called under RCU */
474 static bool __allowed_ingress(const struct net_bridge *br,
475 struct net_bridge_vlan_group *vg,
476 struct sk_buff *skb, u16 *vid,
479 struct br_vlan_stats *stats;
480 struct net_bridge_vlan *v;
483 BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
484 /* If vlan tx offload is disabled on bridge device and frame was
485 * sent from vlan device on the bridge device, it does not have
486 * HW accelerated vlan tag.
488 if (unlikely(!skb_vlan_tag_present(skb) &&
489 skb->protocol == br->vlan_proto)) {
490 skb = skb_vlan_untag(skb);
495 if (!br_vlan_get_tag(skb, vid)) {
497 if (skb->vlan_proto != br->vlan_proto) {
498 /* Protocol-mismatch, empty out vlan_tci for new tag */
499 skb_push(skb, ETH_HLEN);
500 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
501 skb_vlan_tag_get(skb));
505 skb_pull(skb, ETH_HLEN);
506 skb_reset_mac_len(skb);
518 u16 pvid = br_get_pvid(vg);
520 /* Frame had a tag with VID 0 or did not have a tag.
521 * See if pvid is set on this port. That tells us which
522 * vlan untagged or priority-tagged traffic belongs to.
527 /* PVID is set on this port. Any untagged or priority-tagged
528 * ingress frame is considered to belong to this vlan.
532 /* Untagged Frame. */
533 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
535 /* Priority-tagged Frame.
536 * At this point, we know that skb->vlan_tci VID
538 * We update only VID field and preserve PCP field.
540 skb->vlan_tci |= pvid;
542 /* if stats are disabled we can avoid the lookup */
543 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
544 if (*state == BR_STATE_FORWARDING) {
545 *state = br_vlan_get_pvid_state(vg);
546 return br_vlan_state_allowed(*state, true);
552 v = br_vlan_find(vg, *vid);
553 if (!v || !br_vlan_should_use(v))
556 if (*state == BR_STATE_FORWARDING) {
557 *state = br_vlan_get_state(v);
558 if (!br_vlan_state_allowed(*state, true))
562 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
563 stats = this_cpu_ptr(v->stats);
564 u64_stats_update_begin(&stats->syncp);
565 stats->rx_bytes += skb->len;
567 u64_stats_update_end(&stats->syncp);
577 bool br_allowed_ingress(const struct net_bridge *br,
578 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
581 /* If VLAN filtering is disabled on the bridge, all packets are
584 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
585 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
589 return __allowed_ingress(br, vg, skb, vid, state);
592 /* Called under RCU. */
593 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
594 const struct sk_buff *skb)
596 const struct net_bridge_vlan *v;
599 /* If this packet was not filtered at input, let it pass */
600 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
603 br_vlan_get_tag(skb, &vid);
604 v = br_vlan_find(vg, vid);
605 if (v && br_vlan_should_use(v) &&
606 br_vlan_state_allowed(br_vlan_get_state(v), false))
612 /* Called under RCU */
613 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
615 struct net_bridge_vlan_group *vg;
616 struct net_bridge *br = p->br;
617 struct net_bridge_vlan *v;
619 /* If filtering was disabled at input, let it pass. */
620 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
623 vg = nbp_vlan_group_rcu(p);
624 if (!vg || !vg->num_vlans)
627 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
631 *vid = br_get_pvid(vg);
633 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true))
639 v = br_vlan_find(vg, *vid);
640 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true))
646 static int br_vlan_add_existing(struct net_bridge *br,
647 struct net_bridge_vlan_group *vg,
648 struct net_bridge_vlan *vlan,
649 u16 flags, bool *changed,
650 struct netlink_ext_ack *extack)
654 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
655 if (err && err != -EOPNOTSUPP)
658 if (!br_vlan_is_brentry(vlan)) {
659 /* Trying to change flags of non-existent bridge vlan */
660 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
664 /* It was only kept for port vlans, now make it real */
665 err = br_fdb_insert(br, NULL, br->dev->dev_addr,
668 br_err(br, "failed to insert local address into bridge forwarding table\n");
672 refcount_inc(&vlan->refcnt);
673 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
678 if (__vlan_add_flags(vlan, flags))
685 br_switchdev_port_vlan_del(br->dev, vlan->vid);
689 /* Must be protected by RTNL.
690 * Must be called with vid in range from 1 to 4094 inclusive.
691 * changed must be true only if the vlan was created or updated
693 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
694 struct netlink_ext_ack *extack)
696 struct net_bridge_vlan_group *vg;
697 struct net_bridge_vlan *vlan;
703 vg = br_vlan_group(br);
704 vlan = br_vlan_find(vg, vid);
706 return br_vlan_add_existing(br, vg, vlan, flags, changed,
709 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
713 vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
719 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
720 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
722 if (flags & BRIDGE_VLAN_INFO_BRENTRY)
723 refcount_set(&vlan->refcnt, 1);
724 ret = __vlan_add(vlan, flags, extack);
726 free_percpu(vlan->stats);
735 /* Must be protected by RTNL.
736 * Must be called with vid in range from 1 to 4094 inclusive.
738 int br_vlan_delete(struct net_bridge *br, u16 vid)
740 struct net_bridge_vlan_group *vg;
741 struct net_bridge_vlan *v;
745 vg = br_vlan_group(br);
746 v = br_vlan_find(vg, vid);
747 if (!v || !br_vlan_is_brentry(v))
750 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
751 br_fdb_delete_by_port(br, NULL, vid, 0);
753 vlan_tunnel_info_del(vg, v);
755 return __vlan_del(v);
758 void br_vlan_flush(struct net_bridge *br)
760 struct net_bridge_vlan_group *vg;
764 vg = br_vlan_group(br);
765 __vlan_flush(br, NULL, vg);
766 RCU_INIT_POINTER(br->vlgrp, NULL);
768 __vlan_group_free(vg);
771 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
776 return br_vlan_lookup(&vg->vlan_hash, vid);
779 /* Must be protected by RTNL. */
780 static void recalculate_group_addr(struct net_bridge *br)
782 if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
785 spin_lock_bh(&br->lock);
786 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
787 br->vlan_proto == htons(ETH_P_8021Q)) {
788 /* Bridge Group Address */
789 br->group_addr[5] = 0x00;
790 } else { /* vlan_enabled && ETH_P_8021AD */
791 /* Provider Bridge Group Address */
792 br->group_addr[5] = 0x08;
794 spin_unlock_bh(&br->lock);
797 /* Must be protected by RTNL. */
798 void br_recalculate_fwd_mask(struct net_bridge *br)
800 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
801 br->vlan_proto == htons(ETH_P_8021Q))
802 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
803 else /* vlan_enabled && ETH_P_8021AD */
804 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
805 ~(1u << br->group_addr[5]);
808 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
810 struct switchdev_attr attr = {
812 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
813 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
814 .u.vlan_filtering = val,
818 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
821 err = switchdev_port_attr_set(br->dev, &attr);
822 if (err && err != -EOPNOTSUPP)
825 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
826 br_manage_promisc(br);
827 recalculate_group_addr(br);
828 br_recalculate_fwd_mask(br);
833 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
835 return __br_vlan_filter_toggle(br, val);
838 bool br_vlan_enabled(const struct net_device *dev)
840 struct net_bridge *br = netdev_priv(dev);
842 return br_opt_get(br, BROPT_VLAN_ENABLED);
844 EXPORT_SYMBOL_GPL(br_vlan_enabled);
846 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
848 struct net_bridge *br = netdev_priv(dev);
850 *p_proto = ntohs(br->vlan_proto);
854 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
856 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
859 struct net_bridge_port *p;
860 struct net_bridge_vlan *vlan;
861 struct net_bridge_vlan_group *vg;
864 if (br->vlan_proto == proto)
867 /* Add VLANs for the new proto to the device filter. */
868 list_for_each_entry(p, &br->port_list, list) {
869 vg = nbp_vlan_group(p);
870 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
871 err = vlan_vid_add(p->dev, proto, vlan->vid);
877 oldproto = br->vlan_proto;
878 br->vlan_proto = proto;
880 recalculate_group_addr(br);
881 br_recalculate_fwd_mask(br);
883 /* Delete VLANs for the old proto from the device filter. */
884 list_for_each_entry(p, &br->port_list, list) {
885 vg = nbp_vlan_group(p);
886 list_for_each_entry(vlan, &vg->vlan_list, vlist)
887 vlan_vid_del(p->dev, oldproto, vlan->vid);
893 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
894 vlan_vid_del(p->dev, proto, vlan->vid);
896 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
897 vg = nbp_vlan_group(p);
898 list_for_each_entry(vlan, &vg->vlan_list, vlist)
899 vlan_vid_del(p->dev, proto, vlan->vid);
905 int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
907 if (val != ETH_P_8021Q && val != ETH_P_8021AD)
908 return -EPROTONOSUPPORT;
910 return __br_vlan_set_proto(br, htons(val));
913 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
918 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
927 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
929 struct net_bridge_port *p;
931 /* allow to change the option if there are no port vlans configured */
932 list_for_each_entry(p, &br->port_list, list) {
933 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
942 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
951 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
953 struct net_bridge_vlan *v;
958 v = br_vlan_lookup(&vg->vlan_hash, vid);
959 if (v && br_vlan_should_use(v) &&
960 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
966 static void br_vlan_disable_default_pvid(struct net_bridge *br)
968 struct net_bridge_port *p;
969 u16 pvid = br->default_pvid;
971 /* Disable default_pvid on all ports where it is still
974 if (vlan_default_pvid(br_vlan_group(br), pvid)) {
975 if (!br_vlan_delete(br, pvid))
976 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
979 list_for_each_entry(p, &br->port_list, list) {
980 if (vlan_default_pvid(nbp_vlan_group(p), pvid) &&
981 !nbp_vlan_delete(p, pvid))
982 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
985 br->default_pvid = 0;
988 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
989 struct netlink_ext_ack *extack)
991 const struct net_bridge_vlan *pvent;
992 struct net_bridge_vlan_group *vg;
993 struct net_bridge_port *p;
994 unsigned long *changed;
1000 br_vlan_disable_default_pvid(br);
1004 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
1008 old_pvid = br->default_pvid;
1010 /* Update default_pvid config only if we do not conflict with
1011 * user configuration.
1013 vg = br_vlan_group(br);
1014 pvent = br_vlan_find(vg, pvid);
1015 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
1016 (!pvent || !br_vlan_should_use(pvent))) {
1017 err = br_vlan_add(br, pvid,
1018 BRIDGE_VLAN_INFO_PVID |
1019 BRIDGE_VLAN_INFO_UNTAGGED |
1020 BRIDGE_VLAN_INFO_BRENTRY,
1025 if (br_vlan_delete(br, old_pvid))
1026 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN);
1027 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN);
1028 set_bit(0, changed);
1031 list_for_each_entry(p, &br->port_list, list) {
1032 /* Update default_pvid config only if we do not conflict with
1033 * user configuration.
1035 vg = nbp_vlan_group(p);
1037 !vlan_default_pvid(vg, old_pvid)) ||
1038 br_vlan_find(vg, pvid))
1041 err = nbp_vlan_add(p, pvid,
1042 BRIDGE_VLAN_INFO_PVID |
1043 BRIDGE_VLAN_INFO_UNTAGGED,
1047 if (nbp_vlan_delete(p, old_pvid))
1048 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN);
1049 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN);
1050 set_bit(p->port_no, changed);
1053 br->default_pvid = pvid;
1056 bitmap_free(changed);
1060 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1061 if (!test_bit(p->port_no, changed))
1065 nbp_vlan_add(p, old_pvid,
1066 BRIDGE_VLAN_INFO_PVID |
1067 BRIDGE_VLAN_INFO_UNTAGGED,
1069 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN);
1071 nbp_vlan_delete(p, pvid);
1072 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1075 if (test_bit(0, changed)) {
1077 br_vlan_add(br, old_pvid,
1078 BRIDGE_VLAN_INFO_PVID |
1079 BRIDGE_VLAN_INFO_UNTAGGED |
1080 BRIDGE_VLAN_INFO_BRENTRY,
1082 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN);
1084 br_vlan_delete(br, pvid);
1085 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1090 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
1095 if (val >= VLAN_VID_MASK)
1098 if (pvid == br->default_pvid)
1101 /* Only allow default pvid change when filtering is disabled */
1102 if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1103 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1107 err = __br_vlan_set_default_pvid(br, pvid, NULL);
1112 int br_vlan_init(struct net_bridge *br)
1114 struct net_bridge_vlan_group *vg;
1117 vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1120 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1123 ret = vlan_tunnel_init(vg);
1125 goto err_tunnel_init;
1126 INIT_LIST_HEAD(&vg->vlan_list);
1127 br->vlan_proto = htons(ETH_P_8021Q);
1128 br->default_pvid = 1;
1129 rcu_assign_pointer(br->vlgrp, vg);
1135 rhashtable_destroy(&vg->vlan_hash);
1142 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1144 struct switchdev_attr attr = {
1145 .orig_dev = p->br->dev,
1146 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1147 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1148 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1150 struct net_bridge_vlan_group *vg;
1153 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1157 ret = switchdev_port_attr_set(p->dev, &attr);
1158 if (ret && ret != -EOPNOTSUPP)
1159 goto err_vlan_enabled;
1161 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1164 ret = vlan_tunnel_init(vg);
1166 goto err_tunnel_init;
1167 INIT_LIST_HEAD(&vg->vlan_list);
1168 rcu_assign_pointer(p->vlgrp, vg);
1169 if (p->br->default_pvid) {
1172 ret = nbp_vlan_add(p, p->br->default_pvid,
1173 BRIDGE_VLAN_INFO_PVID |
1174 BRIDGE_VLAN_INFO_UNTAGGED,
1178 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN);
1184 RCU_INIT_POINTER(p->vlgrp, NULL);
1186 vlan_tunnel_deinit(vg);
1188 rhashtable_destroy(&vg->vlan_hash);
1196 /* Must be protected by RTNL.
1197 * Must be called with vid in range from 1 to 4094 inclusive.
1198 * changed must be true only if the vlan was created or updated
1200 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1201 bool *changed, struct netlink_ext_ack *extack)
1203 struct net_bridge_vlan *vlan;
1209 vlan = br_vlan_find(nbp_vlan_group(port), vid);
1211 /* Pass the flags to the hardware bridge */
1212 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
1213 if (ret && ret != -EOPNOTSUPP)
1215 *changed = __vlan_add_flags(vlan, flags);
1220 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1226 ret = __vlan_add(vlan, flags, extack);
1235 /* Must be protected by RTNL.
1236 * Must be called with vid in range from 1 to 4094 inclusive.
1238 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1240 struct net_bridge_vlan *v;
1244 v = br_vlan_find(nbp_vlan_group(port), vid);
1247 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1248 br_fdb_delete_by_port(port->br, port, vid, 0);
1250 return __vlan_del(v);
1253 void nbp_vlan_flush(struct net_bridge_port *port)
1255 struct net_bridge_vlan_group *vg;
1259 vg = nbp_vlan_group(port);
1260 __vlan_flush(port->br, port, vg);
1261 RCU_INIT_POINTER(port->vlgrp, NULL);
1263 __vlan_group_free(vg);
1266 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1267 struct br_vlan_stats *stats)
1271 memset(stats, 0, sizeof(*stats));
1272 for_each_possible_cpu(i) {
1273 u64 rxpackets, rxbytes, txpackets, txbytes;
1274 struct br_vlan_stats *cpu_stats;
1277 cpu_stats = per_cpu_ptr(v->stats, i);
1279 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1280 rxpackets = cpu_stats->rx_packets;
1281 rxbytes = cpu_stats->rx_bytes;
1282 txbytes = cpu_stats->tx_bytes;
1283 txpackets = cpu_stats->tx_packets;
1284 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1286 stats->rx_packets += rxpackets;
1287 stats->rx_bytes += rxbytes;
1288 stats->tx_bytes += txbytes;
1289 stats->tx_packets += txpackets;
1293 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1295 struct net_bridge_vlan_group *vg;
1296 struct net_bridge_port *p;
1299 p = br_port_get_check_rtnl(dev);
1301 vg = nbp_vlan_group(p);
1302 else if (netif_is_bridge_master(dev))
1303 vg = br_vlan_group(netdev_priv(dev));
1307 *p_pvid = br_get_pvid(vg);
1310 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1312 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
1314 struct net_bridge_vlan_group *vg;
1315 struct net_bridge_port *p;
1317 p = br_port_get_check_rcu(dev);
1319 vg = nbp_vlan_group_rcu(p);
1320 else if (netif_is_bridge_master(dev))
1321 vg = br_vlan_group_rcu(netdev_priv(dev));
1325 *p_pvid = br_get_pvid(vg);
1328 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
1330 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1331 struct bridge_vlan_info *p_vinfo)
1333 struct net_bridge_vlan_group *vg;
1334 struct net_bridge_vlan *v;
1335 struct net_bridge_port *p;
1338 p = br_port_get_check_rtnl(dev);
1340 vg = nbp_vlan_group(p);
1341 else if (netif_is_bridge_master(dev))
1342 vg = br_vlan_group(netdev_priv(dev));
1346 v = br_vlan_find(vg, vid);
1351 p_vinfo->flags = v->flags;
1352 if (vid == br_get_pvid(vg))
1353 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1356 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1358 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1360 return is_vlan_dev(dev) &&
1361 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1364 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1365 __always_unused struct netdev_nested_priv *priv)
1367 return br_vlan_is_bind_vlan_dev(dev);
1370 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1375 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1382 struct br_vlan_bind_walk_data {
1384 struct net_device *result;
1387 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1388 struct netdev_nested_priv *priv)
1390 struct br_vlan_bind_walk_data *data = priv->data;
1393 if (br_vlan_is_bind_vlan_dev(dev) &&
1394 vlan_dev_priv(dev)->vlan_id == data->vid) {
1402 static struct net_device *
1403 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1405 struct br_vlan_bind_walk_data data = {
1408 struct netdev_nested_priv priv = {
1409 .data = (void *)&data,
1413 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1420 static bool br_vlan_is_dev_up(const struct net_device *dev)
1422 return !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1425 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1426 struct net_device *vlan_dev)
1428 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1429 struct net_bridge_vlan_group *vg;
1430 struct net_bridge_port *p;
1431 bool has_carrier = false;
1433 if (!netif_carrier_ok(br->dev)) {
1434 netif_carrier_off(vlan_dev);
1438 list_for_each_entry(p, &br->port_list, list) {
1439 vg = nbp_vlan_group(p);
1440 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1447 netif_carrier_on(vlan_dev);
1449 netif_carrier_off(vlan_dev);
1452 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1454 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1455 struct net_bridge_vlan *vlan;
1456 struct net_device *vlan_dev;
1458 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1459 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1462 if (br_vlan_is_dev_up(p->dev)) {
1463 if (netif_carrier_ok(p->br->dev))
1464 netif_carrier_on(vlan_dev);
1466 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1472 static void br_vlan_upper_change(struct net_device *dev,
1473 struct net_device *upper_dev,
1476 struct net_bridge *br = netdev_priv(dev);
1478 if (!br_vlan_is_bind_vlan_dev(upper_dev))
1482 br_vlan_set_vlan_dev_state(br, upper_dev);
1483 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1485 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1486 br_vlan_has_upper_bind_vlan_dev(dev));
1490 struct br_vlan_link_state_walk_data {
1491 struct net_bridge *br;
1494 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1495 struct netdev_nested_priv *priv)
1497 struct br_vlan_link_state_walk_data *data = priv->data;
1499 if (br_vlan_is_bind_vlan_dev(vlan_dev))
1500 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1505 static void br_vlan_link_state_change(struct net_device *dev,
1506 struct net_bridge *br)
1508 struct br_vlan_link_state_walk_data data = {
1511 struct netdev_nested_priv priv = {
1512 .data = (void *)&data,
1516 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1521 /* Must be protected by RTNL. */
1522 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1524 struct net_device *vlan_dev;
1526 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1529 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1531 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1534 /* Must be protected by RTNL. */
1535 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr)
1537 struct netdev_notifier_changeupper_info *info;
1538 struct net_bridge *br = netdev_priv(dev);
1539 int vlcmd = 0, ret = 0;
1540 bool changed = false;
1543 case NETDEV_REGISTER:
1544 ret = br_vlan_add(br, br->default_pvid,
1545 BRIDGE_VLAN_INFO_PVID |
1546 BRIDGE_VLAN_INFO_UNTAGGED |
1547 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1548 vlcmd = RTM_NEWVLAN;
1550 case NETDEV_UNREGISTER:
1551 changed = !br_vlan_delete(br, br->default_pvid);
1552 vlcmd = RTM_DELVLAN;
1554 case NETDEV_CHANGEUPPER:
1556 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1561 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1563 br_vlan_link_state_change(dev, br);
1567 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd);
1572 /* Must be protected by RTNL. */
1573 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1575 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1582 br_vlan_set_all_vlan_dev_state(p);
1587 static bool br_vlan_stats_fill(struct sk_buff *skb,
1588 const struct net_bridge_vlan *v)
1590 struct br_vlan_stats stats;
1591 struct nlattr *nest;
1593 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS);
1597 br_vlan_get_stats(v, &stats);
1598 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes,
1599 BRIDGE_VLANDB_STATS_PAD) ||
1600 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS,
1601 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) ||
1602 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes,
1603 BRIDGE_VLANDB_STATS_PAD) ||
1604 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS,
1605 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD))
1608 nla_nest_end(skb, nest);
1613 nla_nest_cancel(skb, nest);
1617 /* v_opts is used to dump the options which must be equal in the whole range */
1618 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range,
1619 const struct net_bridge_vlan *v_opts,
1623 struct bridge_vlan_info info;
1624 struct nlattr *nest;
1626 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY);
1630 memset(&info, 0, sizeof(info));
1632 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
1633 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1634 if (flags & BRIDGE_VLAN_INFO_PVID)
1635 info.flags |= BRIDGE_VLAN_INFO_PVID;
1637 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info))
1640 if (vid_range && vid < vid_range &&
1641 !(flags & BRIDGE_VLAN_INFO_PVID) &&
1642 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range))
1646 if (!br_vlan_opts_fill(skb, v_opts))
1649 if (dump_stats && !br_vlan_stats_fill(skb, v_opts))
1653 nla_nest_end(skb, nest);
1658 nla_nest_cancel(skb, nest);
1662 static size_t rtnl_vlan_nlmsg_size(void)
1664 return NLMSG_ALIGN(sizeof(struct br_vlan_msg))
1665 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */
1666 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */
1667 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */
1668 + br_vlan_opts_nl_size(); /* bridge vlan options */
1671 void br_vlan_notify(const struct net_bridge *br,
1672 const struct net_bridge_port *p,
1673 u16 vid, u16 vid_range,
1676 struct net_bridge_vlan_group *vg;
1677 struct net_bridge_vlan *v = NULL;
1678 struct br_vlan_msg *bvm;
1679 struct nlmsghdr *nlh;
1680 struct sk_buff *skb;
1686 /* right now notifications are done only with rtnl held */
1690 ifindex = p->dev->ifindex;
1691 vg = nbp_vlan_group(p);
1692 net = dev_net(p->dev);
1694 ifindex = br->dev->ifindex;
1695 vg = br_vlan_group(br);
1696 net = dev_net(br->dev);
1699 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL);
1704 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0);
1707 bvm = nlmsg_data(nlh);
1708 memset(bvm, 0, sizeof(*bvm));
1709 bvm->family = AF_BRIDGE;
1710 bvm->ifindex = ifindex;
1714 /* need to find the vlan due to flags/options */
1715 v = br_vlan_find(vg, vid);
1716 if (!v || !br_vlan_should_use(v))
1720 if (br_get_pvid(vg) == v->vid)
1721 flags |= BRIDGE_VLAN_INFO_PVID;
1729 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false))
1732 nlmsg_end(skb, nlh);
1733 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL);
1737 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err);
1742 /* check if v_curr can enter a range ending in range_end */
1743 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1744 const struct net_bridge_vlan *range_end)
1746 return v_curr->vid - range_end->vid == 1 &&
1747 range_end->flags == v_curr->flags &&
1748 br_vlan_opts_eq_range(v_curr, range_end);
1751 static int br_vlan_dump_dev(const struct net_device *dev,
1752 struct sk_buff *skb,
1753 struct netlink_callback *cb,
1756 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL;
1757 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS);
1758 struct net_bridge_vlan_group *vg;
1759 int idx = 0, s_idx = cb->args[1];
1760 struct nlmsghdr *nlh = NULL;
1761 struct net_bridge_port *p;
1762 struct br_vlan_msg *bvm;
1763 struct net_bridge *br;
1767 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
1770 if (netif_is_bridge_master(dev)) {
1771 br = netdev_priv(dev);
1772 vg = br_vlan_group_rcu(br);
1775 p = br_port_get_rcu(dev);
1778 vg = nbp_vlan_group_rcu(p);
1785 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1786 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI);
1789 bvm = nlmsg_data(nlh);
1790 memset(bvm, 0, sizeof(*bvm));
1791 bvm->family = PF_BRIDGE;
1792 bvm->ifindex = dev->ifindex;
1793 pvid = br_get_pvid(vg);
1795 /* idx must stay at range's beginning until it is filled in */
1796 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
1797 if (!br_vlan_should_use(v))
1810 if (dump_stats || v->vid == pvid ||
1811 !br_vlan_can_enter_range(v, range_end)) {
1812 u16 vlan_flags = br_vlan_flags(range_start, pvid);
1814 if (!br_vlan_fill_vids(skb, range_start->vid,
1815 range_end->vid, range_start,
1816 vlan_flags, dump_stats)) {
1820 /* advance number of filled vlans */
1821 idx += range_end->vid - range_start->vid + 1;
1828 /* err will be 0 and range_start will be set in 3 cases here:
1829 * - first vlan (range_start == range_end)
1830 * - last vlan (range_start == range_end, not in range)
1831 * - last vlan range (range_start != range_end, in range)
1833 if (!err && range_start &&
1834 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid,
1835 range_start, br_vlan_flags(range_start, pvid),
1839 cb->args[1] = err ? idx : 0;
1841 nlmsg_end(skb, nlh);
1846 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = {
1847 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 },
1850 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb)
1852 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1];
1853 int idx = 0, err = 0, s_idx = cb->args[0];
1854 struct net *net = sock_net(skb->sk);
1855 struct br_vlan_msg *bvm;
1856 struct net_device *dev;
1859 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX,
1860 br_vlan_db_dump_pol, cb->extack);
1864 bvm = nlmsg_data(cb->nlh);
1865 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS])
1866 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]);
1870 dev = dev_get_by_index_rcu(net, bvm->ifindex);
1875 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
1876 if (err && err != -EMSGSIZE)
1879 for_each_netdev_rcu(net, dev) {
1883 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
1884 if (err == -EMSGSIZE)
1901 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = {
1902 [BRIDGE_VLANDB_ENTRY_INFO] =
1903 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)),
1904 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 },
1905 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 },
1906 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED },
1909 static int br_vlan_rtm_process_one(struct net_device *dev,
1910 const struct nlattr *attr,
1911 int cmd, struct netlink_ext_ack *extack)
1913 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL;
1914 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
1915 bool changed = false, skip_processing = false;
1916 struct net_bridge_vlan_group *vg;
1917 struct net_bridge_port *p = NULL;
1918 int err = 0, cmdmap = 0;
1919 struct net_bridge *br;
1921 if (netif_is_bridge_master(dev)) {
1922 br = netdev_priv(dev);
1923 vg = br_vlan_group(br);
1925 p = br_port_get_rtnl(dev);
1929 vg = nbp_vlan_group(p);
1935 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr,
1936 br_vlan_db_policy, extack);
1940 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) {
1941 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info");
1944 memset(&vrange_end, 0, sizeof(vrange_end));
1946 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
1947 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
1948 BRIDGE_VLAN_INFO_RANGE_END)) {
1949 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls");
1952 if (!br_vlan_valid_id(vinfo->vid, extack))
1955 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) {
1956 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]);
1957 /* validate user-provided flags without RANGE_BEGIN */
1958 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags;
1959 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1961 /* vinfo_last is the range start, vinfo the range end */
1963 vinfo = &vrange_end;
1965 if (!br_vlan_valid_id(vinfo->vid, extack) ||
1966 !br_vlan_valid_range(vinfo, vinfo_last, extack))
1972 cmdmap = RTM_SETLINK;
1973 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS);
1976 cmdmap = RTM_DELLINK;
1980 if (!skip_processing) {
1981 struct bridge_vlan_info *tmp_last = vinfo_last;
1983 /* br_process_vlan_info may overwrite vinfo_last */
1984 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last,
1987 /* notify first if anything changed */
1989 br_ifinfo_notify(cmdmap, br, p);
1995 /* deal with options */
1996 if (cmd == RTM_NEWVLAN) {
1997 struct net_bridge_vlan *range_start, *range_end;
2000 range_start = br_vlan_find(vg, vinfo_last->vid);
2001 range_end = br_vlan_find(vg, vinfo->vid);
2003 range_start = br_vlan_find(vg, vinfo->vid);
2004 range_end = range_start;
2007 err = br_vlan_process_options(br, p, range_start, range_end,
2014 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh,
2015 struct netlink_ext_ack *extack)
2017 struct net *net = sock_net(skb->sk);
2018 struct br_vlan_msg *bvm;
2019 struct net_device *dev;
2020 struct nlattr *attr;
2024 /* this should validate the header and check for remaining bytes */
2025 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL,
2030 bvm = nlmsg_data(nlh);
2031 dev = __dev_get_by_index(net, bvm->ifindex);
2035 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) {
2036 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port");
2040 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) {
2041 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY)
2045 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type,
2051 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process");
2058 void br_vlan_rtnl_init(void)
2060 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL,
2061 br_vlan_rtm_dump, 0);
2062 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN,
2063 br_vlan_rtm_process, NULL, 0);
2064 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN,
2065 br_vlan_rtm_process, NULL, 0);
2068 void br_vlan_rtnl_uninit(void)
2070 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN);
2071 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN);
2072 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN);