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);
272 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) {
274 netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
279 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
281 v->stats = masterv->stats;
284 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
285 if (err && err != -EOPNOTSUPP)
289 /* Add the dev mac and count the vlan only if it's usable */
290 if (br_vlan_should_use(v)) {
291 err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
293 br_err(br, "failed insert local address into bridge forwarding table\n");
299 /* set the state before publishing */
300 v->state = BR_STATE_FORWARDING;
302 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
308 __vlan_add_flags(v, flags);
311 nbp_vlan_set_vlan_dev_state(p, v->vid);
316 if (br_vlan_should_use(v)) {
317 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
323 __vlan_vid_del(dev, br, v);
325 if (v->stats && masterv->stats != v->stats)
326 free_percpu(v->stats);
329 br_vlan_put_master(masterv);
333 br_switchdev_port_vlan_del(dev, v->vid);
339 static int __vlan_del(struct net_bridge_vlan *v)
341 struct net_bridge_vlan *masterv = v;
342 struct net_bridge_vlan_group *vg;
343 struct net_bridge_port *p = NULL;
346 if (br_vlan_is_master(v)) {
347 vg = br_vlan_group(v->br);
350 vg = nbp_vlan_group(v->port);
354 __vlan_delete_pvid(vg, v->vid);
356 err = __vlan_vid_del(p->dev, p->br, v);
360 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
361 if (err && err != -EOPNOTSUPP)
366 if (br_vlan_should_use(v)) {
367 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
372 vlan_tunnel_info_del(vg, v);
373 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
376 nbp_vlan_set_vlan_dev_state(p, v->vid);
377 call_rcu(&v->rcu, nbp_vlan_rcu_free);
380 br_vlan_put_master(masterv);
385 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
387 WARN_ON(!list_empty(&vg->vlan_list));
388 rhashtable_destroy(&vg->vlan_hash);
389 vlan_tunnel_deinit(vg);
393 static void __vlan_flush(const struct net_bridge *br,
394 const struct net_bridge_port *p,
395 struct net_bridge_vlan_group *vg)
397 struct net_bridge_vlan *vlan, *tmp;
398 u16 v_start = 0, v_end = 0;
400 __vlan_delete_pvid(vg, vg->pvid);
401 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
402 /* take care of disjoint ranges */
405 } else if (vlan->vid - v_end != 1) {
406 /* found range end, notify and start next one */
407 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
415 /* notify about the last/whole vlan range */
417 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
420 struct sk_buff *br_handle_vlan(struct net_bridge *br,
421 const struct net_bridge_port *p,
422 struct net_bridge_vlan_group *vg,
425 struct pcpu_sw_netstats *stats;
426 struct net_bridge_vlan *v;
429 /* If this packet was not filtered at input, let it pass */
430 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
433 /* At this point, we know that the frame was filtered and contains
434 * a valid vlan id. If the vlan id has untagged flag set,
435 * send untagged; otherwise, send tagged.
437 br_vlan_get_tag(skb, &vid);
438 v = br_vlan_find(vg, vid);
439 /* Vlan entry must be configured at this point. The
440 * only exception is the bridge is set in promisc mode and the
441 * packet is destined for the bridge device. In this case
442 * pass the packet as is.
444 if (!v || !br_vlan_should_use(v)) {
445 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
452 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
453 stats = this_cpu_ptr(v->stats);
454 u64_stats_update_begin(&stats->syncp);
455 stats->tx_bytes += skb->len;
457 u64_stats_update_end(&stats->syncp);
460 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
461 __vlan_hwaccel_clear_tag(skb);
463 if (p && (p->flags & BR_VLAN_TUNNEL) &&
464 br_handle_egress_vlan_tunnel(skb, v)) {
472 /* Called under RCU */
473 static bool __allowed_ingress(const struct net_bridge *br,
474 struct net_bridge_vlan_group *vg,
475 struct sk_buff *skb, u16 *vid,
478 struct pcpu_sw_netstats *stats;
479 struct net_bridge_vlan *v;
482 BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
483 /* If vlan tx offload is disabled on bridge device and frame was
484 * sent from vlan device on the bridge device, it does not have
485 * HW accelerated vlan tag.
487 if (unlikely(!skb_vlan_tag_present(skb) &&
488 skb->protocol == br->vlan_proto)) {
489 skb = skb_vlan_untag(skb);
494 if (!br_vlan_get_tag(skb, vid)) {
496 if (skb->vlan_proto != br->vlan_proto) {
497 /* Protocol-mismatch, empty out vlan_tci for new tag */
498 skb_push(skb, ETH_HLEN);
499 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
500 skb_vlan_tag_get(skb));
504 skb_pull(skb, ETH_HLEN);
505 skb_reset_mac_len(skb);
517 u16 pvid = br_get_pvid(vg);
519 /* Frame had a tag with VID 0 or did not have a tag.
520 * See if pvid is set on this port. That tells us which
521 * vlan untagged or priority-tagged traffic belongs to.
526 /* PVID is set on this port. Any untagged or priority-tagged
527 * ingress frame is considered to belong to this vlan.
531 /* Untagged Frame. */
532 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
534 /* Priority-tagged Frame.
535 * At this point, we know that skb->vlan_tci VID
537 * We update only VID field and preserve PCP field.
539 skb->vlan_tci |= pvid;
541 /* if stats are disabled we can avoid the lookup */
542 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
543 if (*state == BR_STATE_FORWARDING) {
544 *state = br_vlan_get_pvid_state(vg);
545 return br_vlan_state_allowed(*state, true);
551 v = br_vlan_find(vg, *vid);
552 if (!v || !br_vlan_should_use(v))
555 if (*state == BR_STATE_FORWARDING) {
556 *state = br_vlan_get_state(v);
557 if (!br_vlan_state_allowed(*state, true))
561 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
562 stats = this_cpu_ptr(v->stats);
563 u64_stats_update_begin(&stats->syncp);
564 stats->rx_bytes += skb->len;
566 u64_stats_update_end(&stats->syncp);
576 bool br_allowed_ingress(const struct net_bridge *br,
577 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
580 /* If VLAN filtering is disabled on the bridge, all packets are
583 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
584 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
588 return __allowed_ingress(br, vg, skb, vid, state);
591 /* Called under RCU. */
592 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
593 const struct sk_buff *skb)
595 const struct net_bridge_vlan *v;
598 /* If this packet was not filtered at input, let it pass */
599 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
602 br_vlan_get_tag(skb, &vid);
603 v = br_vlan_find(vg, vid);
604 if (v && br_vlan_should_use(v) &&
605 br_vlan_state_allowed(br_vlan_get_state(v), false))
611 /* Called under RCU */
612 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
614 struct net_bridge_vlan_group *vg;
615 struct net_bridge *br = p->br;
616 struct net_bridge_vlan *v;
618 /* If filtering was disabled at input, let it pass. */
619 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
622 vg = nbp_vlan_group_rcu(p);
623 if (!vg || !vg->num_vlans)
626 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
630 *vid = br_get_pvid(vg);
632 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true))
638 v = br_vlan_find(vg, *vid);
639 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true))
645 static int br_vlan_add_existing(struct net_bridge *br,
646 struct net_bridge_vlan_group *vg,
647 struct net_bridge_vlan *vlan,
648 u16 flags, bool *changed,
649 struct netlink_ext_ack *extack)
653 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
654 if (err && err != -EOPNOTSUPP)
657 if (!br_vlan_is_brentry(vlan)) {
658 /* Trying to change flags of non-existent bridge vlan */
659 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
663 /* It was only kept for port vlans, now make it real */
664 err = br_fdb_insert(br, NULL, br->dev->dev_addr,
667 br_err(br, "failed to insert local address into bridge forwarding table\n");
671 refcount_inc(&vlan->refcnt);
672 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
677 if (__vlan_add_flags(vlan, flags))
684 br_switchdev_port_vlan_del(br->dev, vlan->vid);
688 /* Must be protected by RTNL.
689 * Must be called with vid in range from 1 to 4094 inclusive.
690 * changed must be true only if the vlan was created or updated
692 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
693 struct netlink_ext_ack *extack)
695 struct net_bridge_vlan_group *vg;
696 struct net_bridge_vlan *vlan;
702 vg = br_vlan_group(br);
703 vlan = br_vlan_find(vg, vid);
705 return br_vlan_add_existing(br, vg, vlan, flags, changed,
708 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
712 vlan->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
718 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
719 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
721 if (flags & BRIDGE_VLAN_INFO_BRENTRY)
722 refcount_set(&vlan->refcnt, 1);
723 ret = __vlan_add(vlan, flags, extack);
725 free_percpu(vlan->stats);
734 /* Must be protected by RTNL.
735 * Must be called with vid in range from 1 to 4094 inclusive.
737 int br_vlan_delete(struct net_bridge *br, u16 vid)
739 struct net_bridge_vlan_group *vg;
740 struct net_bridge_vlan *v;
744 vg = br_vlan_group(br);
745 v = br_vlan_find(vg, vid);
746 if (!v || !br_vlan_is_brentry(v))
749 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
750 br_fdb_delete_by_port(br, NULL, vid, 0);
752 vlan_tunnel_info_del(vg, v);
754 return __vlan_del(v);
757 void br_vlan_flush(struct net_bridge *br)
759 struct net_bridge_vlan_group *vg;
763 vg = br_vlan_group(br);
764 __vlan_flush(br, NULL, vg);
765 RCU_INIT_POINTER(br->vlgrp, NULL);
767 __vlan_group_free(vg);
770 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
775 return br_vlan_lookup(&vg->vlan_hash, vid);
778 /* Must be protected by RTNL. */
779 static void recalculate_group_addr(struct net_bridge *br)
781 if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
784 spin_lock_bh(&br->lock);
785 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
786 br->vlan_proto == htons(ETH_P_8021Q)) {
787 /* Bridge Group Address */
788 br->group_addr[5] = 0x00;
789 } else { /* vlan_enabled && ETH_P_8021AD */
790 /* Provider Bridge Group Address */
791 br->group_addr[5] = 0x08;
793 spin_unlock_bh(&br->lock);
796 /* Must be protected by RTNL. */
797 void br_recalculate_fwd_mask(struct net_bridge *br)
799 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
800 br->vlan_proto == htons(ETH_P_8021Q))
801 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
802 else /* vlan_enabled && ETH_P_8021AD */
803 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
804 ~(1u << br->group_addr[5]);
807 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
809 struct switchdev_attr attr = {
811 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
812 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
813 .u.vlan_filtering = val,
817 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
820 err = switchdev_port_attr_set(br->dev, &attr);
821 if (err && err != -EOPNOTSUPP)
824 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
825 br_manage_promisc(br);
826 recalculate_group_addr(br);
827 br_recalculate_fwd_mask(br);
832 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
834 return __br_vlan_filter_toggle(br, val);
837 bool br_vlan_enabled(const struct net_device *dev)
839 struct net_bridge *br = netdev_priv(dev);
841 return br_opt_get(br, BROPT_VLAN_ENABLED);
843 EXPORT_SYMBOL_GPL(br_vlan_enabled);
845 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
847 struct net_bridge *br = netdev_priv(dev);
849 *p_proto = ntohs(br->vlan_proto);
853 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
855 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
857 struct switchdev_attr attr = {
859 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
860 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
861 .u.vlan_protocol = ntohs(proto),
864 struct net_bridge_port *p;
865 struct net_bridge_vlan *vlan;
866 struct net_bridge_vlan_group *vg;
867 __be16 oldproto = br->vlan_proto;
869 if (br->vlan_proto == proto)
872 err = switchdev_port_attr_set(br->dev, &attr);
873 if (err && err != -EOPNOTSUPP)
876 /* Add VLANs for the new proto to the device filter. */
877 list_for_each_entry(p, &br->port_list, list) {
878 vg = nbp_vlan_group(p);
879 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
880 err = vlan_vid_add(p->dev, proto, vlan->vid);
886 br->vlan_proto = proto;
888 recalculate_group_addr(br);
889 br_recalculate_fwd_mask(br);
891 /* Delete VLANs for the old proto from the device filter. */
892 list_for_each_entry(p, &br->port_list, list) {
893 vg = nbp_vlan_group(p);
894 list_for_each_entry(vlan, &vg->vlan_list, vlist)
895 vlan_vid_del(p->dev, oldproto, vlan->vid);
901 attr.u.vlan_protocol = ntohs(oldproto);
902 switchdev_port_attr_set(br->dev, &attr);
904 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
905 vlan_vid_del(p->dev, proto, vlan->vid);
907 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
908 vg = nbp_vlan_group(p);
909 list_for_each_entry(vlan, &vg->vlan_list, vlist)
910 vlan_vid_del(p->dev, proto, vlan->vid);
916 int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
918 if (val != ETH_P_8021Q && val != ETH_P_8021AD)
919 return -EPROTONOSUPPORT;
921 return __br_vlan_set_proto(br, htons(val));
924 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
929 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
938 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
940 struct net_bridge_port *p;
942 /* allow to change the option if there are no port vlans configured */
943 list_for_each_entry(p, &br->port_list, list) {
944 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
953 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
962 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
964 struct net_bridge_vlan *v;
969 v = br_vlan_lookup(&vg->vlan_hash, vid);
970 if (v && br_vlan_should_use(v) &&
971 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
977 static void br_vlan_disable_default_pvid(struct net_bridge *br)
979 struct net_bridge_port *p;
980 u16 pvid = br->default_pvid;
982 /* Disable default_pvid on all ports where it is still
985 if (vlan_default_pvid(br_vlan_group(br), pvid)) {
986 if (!br_vlan_delete(br, pvid))
987 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
990 list_for_each_entry(p, &br->port_list, list) {
991 if (vlan_default_pvid(nbp_vlan_group(p), pvid) &&
992 !nbp_vlan_delete(p, pvid))
993 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
996 br->default_pvid = 0;
999 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1000 struct netlink_ext_ack *extack)
1002 const struct net_bridge_vlan *pvent;
1003 struct net_bridge_vlan_group *vg;
1004 struct net_bridge_port *p;
1005 unsigned long *changed;
1011 br_vlan_disable_default_pvid(br);
1015 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
1019 old_pvid = br->default_pvid;
1021 /* Update default_pvid config only if we do not conflict with
1022 * user configuration.
1024 vg = br_vlan_group(br);
1025 pvent = br_vlan_find(vg, pvid);
1026 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
1027 (!pvent || !br_vlan_should_use(pvent))) {
1028 err = br_vlan_add(br, pvid,
1029 BRIDGE_VLAN_INFO_PVID |
1030 BRIDGE_VLAN_INFO_UNTAGGED |
1031 BRIDGE_VLAN_INFO_BRENTRY,
1036 if (br_vlan_delete(br, old_pvid))
1037 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN);
1038 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN);
1039 set_bit(0, changed);
1042 list_for_each_entry(p, &br->port_list, list) {
1043 /* Update default_pvid config only if we do not conflict with
1044 * user configuration.
1046 vg = nbp_vlan_group(p);
1048 !vlan_default_pvid(vg, old_pvid)) ||
1049 br_vlan_find(vg, pvid))
1052 err = nbp_vlan_add(p, pvid,
1053 BRIDGE_VLAN_INFO_PVID |
1054 BRIDGE_VLAN_INFO_UNTAGGED,
1058 if (nbp_vlan_delete(p, old_pvid))
1059 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN);
1060 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN);
1061 set_bit(p->port_no, changed);
1064 br->default_pvid = pvid;
1067 bitmap_free(changed);
1071 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1072 if (!test_bit(p->port_no, changed))
1076 nbp_vlan_add(p, old_pvid,
1077 BRIDGE_VLAN_INFO_PVID |
1078 BRIDGE_VLAN_INFO_UNTAGGED,
1080 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN);
1082 nbp_vlan_delete(p, pvid);
1083 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1086 if (test_bit(0, changed)) {
1088 br_vlan_add(br, old_pvid,
1089 BRIDGE_VLAN_INFO_PVID |
1090 BRIDGE_VLAN_INFO_UNTAGGED |
1091 BRIDGE_VLAN_INFO_BRENTRY,
1093 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN);
1095 br_vlan_delete(br, pvid);
1096 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1101 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
1106 if (val >= VLAN_VID_MASK)
1109 if (pvid == br->default_pvid)
1112 /* Only allow default pvid change when filtering is disabled */
1113 if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1114 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1118 err = __br_vlan_set_default_pvid(br, pvid, NULL);
1123 int br_vlan_init(struct net_bridge *br)
1125 struct net_bridge_vlan_group *vg;
1128 vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1131 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1134 ret = vlan_tunnel_init(vg);
1136 goto err_tunnel_init;
1137 INIT_LIST_HEAD(&vg->vlan_list);
1138 br->vlan_proto = htons(ETH_P_8021Q);
1139 br->default_pvid = 1;
1140 rcu_assign_pointer(br->vlgrp, vg);
1146 rhashtable_destroy(&vg->vlan_hash);
1153 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1155 struct switchdev_attr attr = {
1156 .orig_dev = p->br->dev,
1157 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1158 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1159 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1161 struct net_bridge_vlan_group *vg;
1164 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1168 ret = switchdev_port_attr_set(p->dev, &attr);
1169 if (ret && ret != -EOPNOTSUPP)
1170 goto err_vlan_enabled;
1172 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1175 ret = vlan_tunnel_init(vg);
1177 goto err_tunnel_init;
1178 INIT_LIST_HEAD(&vg->vlan_list);
1179 rcu_assign_pointer(p->vlgrp, vg);
1180 if (p->br->default_pvid) {
1183 ret = nbp_vlan_add(p, p->br->default_pvid,
1184 BRIDGE_VLAN_INFO_PVID |
1185 BRIDGE_VLAN_INFO_UNTAGGED,
1189 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN);
1195 RCU_INIT_POINTER(p->vlgrp, NULL);
1197 vlan_tunnel_deinit(vg);
1199 rhashtable_destroy(&vg->vlan_hash);
1207 /* Must be protected by RTNL.
1208 * Must be called with vid in range from 1 to 4094 inclusive.
1209 * changed must be true only if the vlan was created or updated
1211 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1212 bool *changed, struct netlink_ext_ack *extack)
1214 struct net_bridge_vlan *vlan;
1220 vlan = br_vlan_find(nbp_vlan_group(port), vid);
1222 /* Pass the flags to the hardware bridge */
1223 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
1224 if (ret && ret != -EOPNOTSUPP)
1226 *changed = __vlan_add_flags(vlan, flags);
1231 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1237 ret = __vlan_add(vlan, flags, extack);
1246 /* Must be protected by RTNL.
1247 * Must be called with vid in range from 1 to 4094 inclusive.
1249 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1251 struct net_bridge_vlan *v;
1255 v = br_vlan_find(nbp_vlan_group(port), vid);
1258 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1259 br_fdb_delete_by_port(port->br, port, vid, 0);
1261 return __vlan_del(v);
1264 void nbp_vlan_flush(struct net_bridge_port *port)
1266 struct net_bridge_vlan_group *vg;
1270 vg = nbp_vlan_group(port);
1271 __vlan_flush(port->br, port, vg);
1272 RCU_INIT_POINTER(port->vlgrp, NULL);
1274 __vlan_group_free(vg);
1277 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1278 struct pcpu_sw_netstats *stats)
1282 memset(stats, 0, sizeof(*stats));
1283 for_each_possible_cpu(i) {
1284 u64 rxpackets, rxbytes, txpackets, txbytes;
1285 struct pcpu_sw_netstats *cpu_stats;
1288 cpu_stats = per_cpu_ptr(v->stats, i);
1290 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1291 rxpackets = cpu_stats->rx_packets;
1292 rxbytes = cpu_stats->rx_bytes;
1293 txbytes = cpu_stats->tx_bytes;
1294 txpackets = cpu_stats->tx_packets;
1295 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1297 stats->rx_packets += rxpackets;
1298 stats->rx_bytes += rxbytes;
1299 stats->tx_bytes += txbytes;
1300 stats->tx_packets += txpackets;
1304 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1306 struct net_bridge_vlan_group *vg;
1307 struct net_bridge_port *p;
1310 p = br_port_get_check_rtnl(dev);
1312 vg = nbp_vlan_group(p);
1313 else if (netif_is_bridge_master(dev))
1314 vg = br_vlan_group(netdev_priv(dev));
1318 *p_pvid = br_get_pvid(vg);
1321 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1323 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
1325 struct net_bridge_vlan_group *vg;
1326 struct net_bridge_port *p;
1328 p = br_port_get_check_rcu(dev);
1330 vg = nbp_vlan_group_rcu(p);
1331 else if (netif_is_bridge_master(dev))
1332 vg = br_vlan_group_rcu(netdev_priv(dev));
1336 *p_pvid = br_get_pvid(vg);
1339 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
1341 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1342 struct bridge_vlan_info *p_vinfo)
1344 struct net_bridge_vlan_group *vg;
1345 struct net_bridge_vlan *v;
1346 struct net_bridge_port *p;
1349 p = br_port_get_check_rtnl(dev);
1351 vg = nbp_vlan_group(p);
1352 else if (netif_is_bridge_master(dev))
1353 vg = br_vlan_group(netdev_priv(dev));
1357 v = br_vlan_find(vg, vid);
1362 p_vinfo->flags = v->flags;
1363 if (vid == br_get_pvid(vg))
1364 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1367 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1369 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1371 return is_vlan_dev(dev) &&
1372 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1375 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1376 __always_unused struct netdev_nested_priv *priv)
1378 return br_vlan_is_bind_vlan_dev(dev);
1381 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1386 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1393 struct br_vlan_bind_walk_data {
1395 struct net_device *result;
1398 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1399 struct netdev_nested_priv *priv)
1401 struct br_vlan_bind_walk_data *data = priv->data;
1404 if (br_vlan_is_bind_vlan_dev(dev) &&
1405 vlan_dev_priv(dev)->vlan_id == data->vid) {
1413 static struct net_device *
1414 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1416 struct br_vlan_bind_walk_data data = {
1419 struct netdev_nested_priv priv = {
1420 .data = (void *)&data,
1424 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1431 static bool br_vlan_is_dev_up(const struct net_device *dev)
1433 return !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1436 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1437 struct net_device *vlan_dev)
1439 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1440 struct net_bridge_vlan_group *vg;
1441 struct net_bridge_port *p;
1442 bool has_carrier = false;
1444 if (!netif_carrier_ok(br->dev)) {
1445 netif_carrier_off(vlan_dev);
1449 list_for_each_entry(p, &br->port_list, list) {
1450 vg = nbp_vlan_group(p);
1451 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1458 netif_carrier_on(vlan_dev);
1460 netif_carrier_off(vlan_dev);
1463 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1465 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1466 struct net_bridge_vlan *vlan;
1467 struct net_device *vlan_dev;
1469 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1470 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1473 if (br_vlan_is_dev_up(p->dev)) {
1474 if (netif_carrier_ok(p->br->dev))
1475 netif_carrier_on(vlan_dev);
1477 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1483 static void br_vlan_upper_change(struct net_device *dev,
1484 struct net_device *upper_dev,
1487 struct net_bridge *br = netdev_priv(dev);
1489 if (!br_vlan_is_bind_vlan_dev(upper_dev))
1493 br_vlan_set_vlan_dev_state(br, upper_dev);
1494 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1496 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1497 br_vlan_has_upper_bind_vlan_dev(dev));
1501 struct br_vlan_link_state_walk_data {
1502 struct net_bridge *br;
1505 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1506 struct netdev_nested_priv *priv)
1508 struct br_vlan_link_state_walk_data *data = priv->data;
1510 if (br_vlan_is_bind_vlan_dev(vlan_dev))
1511 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1516 static void br_vlan_link_state_change(struct net_device *dev,
1517 struct net_bridge *br)
1519 struct br_vlan_link_state_walk_data data = {
1522 struct netdev_nested_priv priv = {
1523 .data = (void *)&data,
1527 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1532 /* Must be protected by RTNL. */
1533 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1535 struct net_device *vlan_dev;
1537 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1540 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1542 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1545 /* Must be protected by RTNL. */
1546 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr)
1548 struct netdev_notifier_changeupper_info *info;
1549 struct net_bridge *br = netdev_priv(dev);
1550 int vlcmd = 0, ret = 0;
1551 bool changed = false;
1554 case NETDEV_REGISTER:
1555 ret = br_vlan_add(br, br->default_pvid,
1556 BRIDGE_VLAN_INFO_PVID |
1557 BRIDGE_VLAN_INFO_UNTAGGED |
1558 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1559 vlcmd = RTM_NEWVLAN;
1561 case NETDEV_UNREGISTER:
1562 changed = !br_vlan_delete(br, br->default_pvid);
1563 vlcmd = RTM_DELVLAN;
1565 case NETDEV_CHANGEUPPER:
1567 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1572 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1574 br_vlan_link_state_change(dev, br);
1578 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd);
1583 /* Must be protected by RTNL. */
1584 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1586 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1593 br_vlan_set_all_vlan_dev_state(p);
1598 static bool br_vlan_stats_fill(struct sk_buff *skb,
1599 const struct net_bridge_vlan *v)
1601 struct pcpu_sw_netstats stats;
1602 struct nlattr *nest;
1604 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS);
1608 br_vlan_get_stats(v, &stats);
1609 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes,
1610 BRIDGE_VLANDB_STATS_PAD) ||
1611 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS,
1612 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) ||
1613 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes,
1614 BRIDGE_VLANDB_STATS_PAD) ||
1615 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS,
1616 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD))
1619 nla_nest_end(skb, nest);
1624 nla_nest_cancel(skb, nest);
1628 /* v_opts is used to dump the options which must be equal in the whole range */
1629 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range,
1630 const struct net_bridge_vlan *v_opts,
1634 struct bridge_vlan_info info;
1635 struct nlattr *nest;
1637 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY);
1641 memset(&info, 0, sizeof(info));
1643 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
1644 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1645 if (flags & BRIDGE_VLAN_INFO_PVID)
1646 info.flags |= BRIDGE_VLAN_INFO_PVID;
1648 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info))
1651 if (vid_range && vid < vid_range &&
1652 !(flags & BRIDGE_VLAN_INFO_PVID) &&
1653 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range))
1657 if (!br_vlan_opts_fill(skb, v_opts))
1660 if (dump_stats && !br_vlan_stats_fill(skb, v_opts))
1664 nla_nest_end(skb, nest);
1669 nla_nest_cancel(skb, nest);
1673 static size_t rtnl_vlan_nlmsg_size(void)
1675 return NLMSG_ALIGN(sizeof(struct br_vlan_msg))
1676 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */
1677 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */
1678 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */
1679 + br_vlan_opts_nl_size(); /* bridge vlan options */
1682 void br_vlan_notify(const struct net_bridge *br,
1683 const struct net_bridge_port *p,
1684 u16 vid, u16 vid_range,
1687 struct net_bridge_vlan_group *vg;
1688 struct net_bridge_vlan *v = NULL;
1689 struct br_vlan_msg *bvm;
1690 struct nlmsghdr *nlh;
1691 struct sk_buff *skb;
1697 /* right now notifications are done only with rtnl held */
1701 ifindex = p->dev->ifindex;
1702 vg = nbp_vlan_group(p);
1703 net = dev_net(p->dev);
1705 ifindex = br->dev->ifindex;
1706 vg = br_vlan_group(br);
1707 net = dev_net(br->dev);
1710 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL);
1715 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0);
1718 bvm = nlmsg_data(nlh);
1719 memset(bvm, 0, sizeof(*bvm));
1720 bvm->family = AF_BRIDGE;
1721 bvm->ifindex = ifindex;
1725 /* need to find the vlan due to flags/options */
1726 v = br_vlan_find(vg, vid);
1727 if (!v || !br_vlan_should_use(v))
1731 if (br_get_pvid(vg) == v->vid)
1732 flags |= BRIDGE_VLAN_INFO_PVID;
1740 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false))
1743 nlmsg_end(skb, nlh);
1744 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL);
1748 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err);
1753 /* check if v_curr can enter a range ending in range_end */
1754 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1755 const struct net_bridge_vlan *range_end)
1757 return v_curr->vid - range_end->vid == 1 &&
1758 range_end->flags == v_curr->flags &&
1759 br_vlan_opts_eq_range(v_curr, range_end);
1762 static int br_vlan_dump_dev(const struct net_device *dev,
1763 struct sk_buff *skb,
1764 struct netlink_callback *cb,
1767 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL;
1768 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS);
1769 struct net_bridge_vlan_group *vg;
1770 int idx = 0, s_idx = cb->args[1];
1771 struct nlmsghdr *nlh = NULL;
1772 struct net_bridge_port *p;
1773 struct br_vlan_msg *bvm;
1774 struct net_bridge *br;
1778 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
1781 if (netif_is_bridge_master(dev)) {
1782 br = netdev_priv(dev);
1783 vg = br_vlan_group_rcu(br);
1786 p = br_port_get_rcu(dev);
1789 vg = nbp_vlan_group_rcu(p);
1796 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1797 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI);
1800 bvm = nlmsg_data(nlh);
1801 memset(bvm, 0, sizeof(*bvm));
1802 bvm->family = PF_BRIDGE;
1803 bvm->ifindex = dev->ifindex;
1804 pvid = br_get_pvid(vg);
1806 /* idx must stay at range's beginning until it is filled in */
1807 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
1808 if (!br_vlan_should_use(v))
1821 if (dump_stats || v->vid == pvid ||
1822 !br_vlan_can_enter_range(v, range_end)) {
1823 u16 vlan_flags = br_vlan_flags(range_start, pvid);
1825 if (!br_vlan_fill_vids(skb, range_start->vid,
1826 range_end->vid, range_start,
1827 vlan_flags, dump_stats)) {
1831 /* advance number of filled vlans */
1832 idx += range_end->vid - range_start->vid + 1;
1839 /* err will be 0 and range_start will be set in 3 cases here:
1840 * - first vlan (range_start == range_end)
1841 * - last vlan (range_start == range_end, not in range)
1842 * - last vlan range (range_start != range_end, in range)
1844 if (!err && range_start &&
1845 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid,
1846 range_start, br_vlan_flags(range_start, pvid),
1850 cb->args[1] = err ? idx : 0;
1852 nlmsg_end(skb, nlh);
1857 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = {
1858 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 },
1861 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb)
1863 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1];
1864 int idx = 0, err = 0, s_idx = cb->args[0];
1865 struct net *net = sock_net(skb->sk);
1866 struct br_vlan_msg *bvm;
1867 struct net_device *dev;
1870 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX,
1871 br_vlan_db_dump_pol, cb->extack);
1875 bvm = nlmsg_data(cb->nlh);
1876 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS])
1877 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]);
1881 dev = dev_get_by_index_rcu(net, bvm->ifindex);
1886 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
1887 if (err && err != -EMSGSIZE)
1890 for_each_netdev_rcu(net, dev) {
1894 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
1895 if (err == -EMSGSIZE)
1912 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = {
1913 [BRIDGE_VLANDB_ENTRY_INFO] =
1914 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)),
1915 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 },
1916 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 },
1917 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED },
1920 static int br_vlan_rtm_process_one(struct net_device *dev,
1921 const struct nlattr *attr,
1922 int cmd, struct netlink_ext_ack *extack)
1924 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL;
1925 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
1926 bool changed = false, skip_processing = false;
1927 struct net_bridge_vlan_group *vg;
1928 struct net_bridge_port *p = NULL;
1929 int err = 0, cmdmap = 0;
1930 struct net_bridge *br;
1932 if (netif_is_bridge_master(dev)) {
1933 br = netdev_priv(dev);
1934 vg = br_vlan_group(br);
1936 p = br_port_get_rtnl(dev);
1940 vg = nbp_vlan_group(p);
1946 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr,
1947 br_vlan_db_policy, extack);
1951 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) {
1952 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info");
1955 memset(&vrange_end, 0, sizeof(vrange_end));
1957 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
1958 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
1959 BRIDGE_VLAN_INFO_RANGE_END)) {
1960 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls");
1963 if (!br_vlan_valid_id(vinfo->vid, extack))
1966 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) {
1967 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]);
1968 /* validate user-provided flags without RANGE_BEGIN */
1969 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags;
1970 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1972 /* vinfo_last is the range start, vinfo the range end */
1974 vinfo = &vrange_end;
1976 if (!br_vlan_valid_id(vinfo->vid, extack) ||
1977 !br_vlan_valid_range(vinfo, vinfo_last, extack))
1983 cmdmap = RTM_SETLINK;
1984 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS);
1987 cmdmap = RTM_DELLINK;
1991 if (!skip_processing) {
1992 struct bridge_vlan_info *tmp_last = vinfo_last;
1994 /* br_process_vlan_info may overwrite vinfo_last */
1995 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last,
1998 /* notify first if anything changed */
2000 br_ifinfo_notify(cmdmap, br, p);
2006 /* deal with options */
2007 if (cmd == RTM_NEWVLAN) {
2008 struct net_bridge_vlan *range_start, *range_end;
2011 range_start = br_vlan_find(vg, vinfo_last->vid);
2012 range_end = br_vlan_find(vg, vinfo->vid);
2014 range_start = br_vlan_find(vg, vinfo->vid);
2015 range_end = range_start;
2018 err = br_vlan_process_options(br, p, range_start, range_end,
2025 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh,
2026 struct netlink_ext_ack *extack)
2028 struct net *net = sock_net(skb->sk);
2029 struct br_vlan_msg *bvm;
2030 struct net_device *dev;
2031 struct nlattr *attr;
2035 /* this should validate the header and check for remaining bytes */
2036 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL,
2041 bvm = nlmsg_data(nlh);
2042 dev = __dev_get_by_index(net, bvm->ifindex);
2046 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) {
2047 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port");
2051 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) {
2052 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY)
2056 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type,
2062 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process");
2069 void br_vlan_rtnl_init(void)
2071 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL,
2072 br_vlan_rtm_dump, 0);
2073 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN,
2074 br_vlan_rtm_process, NULL, 0);
2075 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN,
2076 br_vlan_rtm_process, NULL, 0);
2079 void br_vlan_rtnl_uninit(void)
2081 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN);
2082 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN);
2083 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN);