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)
119 list_add_rcu(&v->vlist, hpos);
122 static void __vlan_del_list(struct net_bridge_vlan *v)
124 list_del_rcu(&v->vlist);
127 static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br,
128 const struct net_bridge_vlan *v)
132 /* Try switchdev op first. In case it is not supported, fallback to
135 err = br_switchdev_port_vlan_del(dev, v->vid);
136 if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV))
137 vlan_vid_del(dev, br->vlan_proto, v->vid);
138 return err == -EOPNOTSUPP ? 0 : err;
141 /* Returns a master vlan, if it didn't exist it gets created. In all cases
142 * a reference is taken to the master vlan before returning.
144 static struct net_bridge_vlan *
145 br_vlan_get_master(struct net_bridge *br, u16 vid,
146 struct netlink_ext_ack *extack)
148 struct net_bridge_vlan_group *vg;
149 struct net_bridge_vlan *masterv;
151 vg = br_vlan_group(br);
152 masterv = br_vlan_find(vg, vid);
156 /* missing global ctx, create it now */
157 if (br_vlan_add(br, vid, 0, &changed, extack))
159 masterv = br_vlan_find(vg, vid);
160 if (WARN_ON(!masterv))
162 refcount_set(&masterv->refcnt, 1);
165 refcount_inc(&masterv->refcnt);
170 static void br_master_vlan_rcu_free(struct rcu_head *rcu)
172 struct net_bridge_vlan *v;
174 v = container_of(rcu, struct net_bridge_vlan, rcu);
175 WARN_ON(!br_vlan_is_master(v));
176 free_percpu(v->stats);
181 static void br_vlan_put_master(struct net_bridge_vlan *masterv)
183 struct net_bridge_vlan_group *vg;
185 if (!br_vlan_is_master(masterv))
188 vg = br_vlan_group(masterv->br);
189 if (refcount_dec_and_test(&masterv->refcnt)) {
190 rhashtable_remove_fast(&vg->vlan_hash,
191 &masterv->vnode, br_vlan_rht_params);
192 __vlan_del_list(masterv);
193 br_multicast_toggle_one_vlan(masterv, false);
194 br_multicast_ctx_deinit(&masterv->br_mcast_ctx);
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)) {
276 netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
281 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
283 v->stats = masterv->stats;
285 br_multicast_port_ctx_init(p, v, &v->port_mcast_ctx);
287 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
288 if (err && err != -EOPNOTSUPP)
290 br_multicast_ctx_init(br, v, &v->br_mcast_ctx);
291 v->priv_flags |= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
294 /* Add the dev mac and count the vlan only if it's usable */
295 if (br_vlan_should_use(v)) {
296 err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
298 br_err(br, "failed insert local address into bridge forwarding table\n");
304 /* set the state before publishing */
305 v->state = BR_STATE_FORWARDING;
307 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
313 __vlan_add_flags(v, flags);
314 br_multicast_toggle_one_vlan(v, true);
317 nbp_vlan_set_vlan_dev_state(p, v->vid);
322 if (br_vlan_should_use(v)) {
323 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
329 __vlan_vid_del(dev, br, v);
331 if (v->stats && masterv->stats != v->stats)
332 free_percpu(v->stats);
335 br_vlan_put_master(masterv);
339 br_switchdev_port_vlan_del(dev, v->vid);
345 static int __vlan_del(struct net_bridge_vlan *v)
347 struct net_bridge_vlan *masterv = v;
348 struct net_bridge_vlan_group *vg;
349 struct net_bridge_port *p = NULL;
352 if (br_vlan_is_master(v)) {
353 vg = br_vlan_group(v->br);
356 vg = nbp_vlan_group(v->port);
360 __vlan_delete_pvid(vg, v->vid);
362 err = __vlan_vid_del(p->dev, p->br, v);
366 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
367 if (err && err != -EOPNOTSUPP)
372 if (br_vlan_should_use(v)) {
373 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
378 vlan_tunnel_info_del(vg, v);
379 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
382 nbp_vlan_set_vlan_dev_state(p, v->vid);
383 br_multicast_toggle_one_vlan(v, false);
384 br_multicast_port_ctx_deinit(&v->port_mcast_ctx);
385 call_rcu(&v->rcu, nbp_vlan_rcu_free);
388 br_vlan_put_master(masterv);
393 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
395 WARN_ON(!list_empty(&vg->vlan_list));
396 rhashtable_destroy(&vg->vlan_hash);
397 vlan_tunnel_deinit(vg);
401 static void __vlan_flush(const struct net_bridge *br,
402 const struct net_bridge_port *p,
403 struct net_bridge_vlan_group *vg)
405 struct net_bridge_vlan *vlan, *tmp;
406 u16 v_start = 0, v_end = 0;
408 __vlan_delete_pvid(vg, vg->pvid);
409 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
410 /* take care of disjoint ranges */
413 } else if (vlan->vid - v_end != 1) {
414 /* found range end, notify and start next one */
415 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
423 /* notify about the last/whole vlan range */
425 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
428 struct sk_buff *br_handle_vlan(struct net_bridge *br,
429 const struct net_bridge_port *p,
430 struct net_bridge_vlan_group *vg,
433 struct pcpu_sw_netstats *stats;
434 struct net_bridge_vlan *v;
437 /* If this packet was not filtered at input, let it pass */
438 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
441 /* At this point, we know that the frame was filtered and contains
442 * a valid vlan id. If the vlan id has untagged flag set,
443 * send untagged; otherwise, send tagged.
445 br_vlan_get_tag(skb, &vid);
446 v = br_vlan_find(vg, vid);
447 /* Vlan entry must be configured at this point. The
448 * only exception is the bridge is set in promisc mode and the
449 * packet is destined for the bridge device. In this case
450 * pass the packet as is.
452 if (!v || !br_vlan_should_use(v)) {
453 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
460 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
461 stats = this_cpu_ptr(v->stats);
462 u64_stats_update_begin(&stats->syncp);
463 stats->tx_bytes += skb->len;
465 u64_stats_update_end(&stats->syncp);
468 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
469 __vlan_hwaccel_clear_tag(skb);
471 if (p && (p->flags & BR_VLAN_TUNNEL) &&
472 br_handle_egress_vlan_tunnel(skb, v)) {
480 /* Called under RCU */
481 static bool __allowed_ingress(const struct net_bridge *br,
482 struct net_bridge_vlan_group *vg,
483 struct sk_buff *skb, u16 *vid,
485 struct net_bridge_vlan **vlan)
487 struct pcpu_sw_netstats *stats;
488 struct net_bridge_vlan *v;
491 BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
492 /* If vlan tx offload is disabled on bridge device and frame was
493 * sent from vlan device on the bridge device, it does not have
494 * HW accelerated vlan tag.
496 if (unlikely(!skb_vlan_tag_present(skb) &&
497 skb->protocol == br->vlan_proto)) {
498 skb = skb_vlan_untag(skb);
503 if (!br_vlan_get_tag(skb, vid)) {
505 if (skb->vlan_proto != br->vlan_proto) {
506 /* Protocol-mismatch, empty out vlan_tci for new tag */
507 skb_push(skb, ETH_HLEN);
508 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
509 skb_vlan_tag_get(skb));
513 skb_pull(skb, ETH_HLEN);
514 skb_reset_mac_len(skb);
526 u16 pvid = br_get_pvid(vg);
528 /* Frame had a tag with VID 0 or did not have a tag.
529 * See if pvid is set on this port. That tells us which
530 * vlan untagged or priority-tagged traffic belongs to.
535 /* PVID is set on this port. Any untagged or priority-tagged
536 * ingress frame is considered to belong to this vlan.
540 /* Untagged Frame. */
541 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
543 /* Priority-tagged Frame.
544 * At this point, we know that skb->vlan_tci VID
546 * We update only VID field and preserve PCP field.
548 skb->vlan_tci |= pvid;
550 /* if snooping and stats are disabled we can avoid the lookup */
551 if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) &&
552 !br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
553 if (*state == BR_STATE_FORWARDING) {
554 *state = br_vlan_get_pvid_state(vg);
555 return br_vlan_state_allowed(*state, true);
561 v = br_vlan_find(vg, *vid);
562 if (!v || !br_vlan_should_use(v))
565 if (*state == BR_STATE_FORWARDING) {
566 *state = br_vlan_get_state(v);
567 if (!br_vlan_state_allowed(*state, true))
571 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
572 stats = this_cpu_ptr(v->stats);
573 u64_stats_update_begin(&stats->syncp);
574 stats->rx_bytes += skb->len;
576 u64_stats_update_end(&stats->syncp);
588 bool br_allowed_ingress(const struct net_bridge *br,
589 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
591 struct net_bridge_vlan **vlan)
593 /* If VLAN filtering is disabled on the bridge, all packets are
597 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
598 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
602 return __allowed_ingress(br, vg, skb, vid, state, vlan);
605 /* Called under RCU. */
606 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
607 const struct sk_buff *skb)
609 const struct net_bridge_vlan *v;
612 /* If this packet was not filtered at input, let it pass */
613 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
616 br_vlan_get_tag(skb, &vid);
617 v = br_vlan_find(vg, vid);
618 if (v && br_vlan_should_use(v) &&
619 br_vlan_state_allowed(br_vlan_get_state(v), false))
625 /* Called under RCU */
626 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
628 struct net_bridge_vlan_group *vg;
629 struct net_bridge *br = p->br;
630 struct net_bridge_vlan *v;
632 /* If filtering was disabled at input, let it pass. */
633 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
636 vg = nbp_vlan_group_rcu(p);
637 if (!vg || !vg->num_vlans)
640 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
644 *vid = br_get_pvid(vg);
646 !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true))
652 v = br_vlan_find(vg, *vid);
653 if (v && br_vlan_state_allowed(br_vlan_get_state(v), true))
659 static int br_vlan_add_existing(struct net_bridge *br,
660 struct net_bridge_vlan_group *vg,
661 struct net_bridge_vlan *vlan,
662 u16 flags, bool *changed,
663 struct netlink_ext_ack *extack)
667 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
668 if (err && err != -EOPNOTSUPP)
671 if (!br_vlan_is_brentry(vlan)) {
672 /* Trying to change flags of non-existent bridge vlan */
673 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
677 /* It was only kept for port vlans, now make it real */
678 err = br_fdb_insert(br, NULL, br->dev->dev_addr,
681 br_err(br, "failed to insert local address into bridge forwarding table\n");
685 refcount_inc(&vlan->refcnt);
686 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
691 if (__vlan_add_flags(vlan, flags))
698 br_switchdev_port_vlan_del(br->dev, vlan->vid);
702 /* Must be protected by RTNL.
703 * Must be called with vid in range from 1 to 4094 inclusive.
704 * changed must be true only if the vlan was created or updated
706 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
707 struct netlink_ext_ack *extack)
709 struct net_bridge_vlan_group *vg;
710 struct net_bridge_vlan *vlan;
716 vg = br_vlan_group(br);
717 vlan = br_vlan_find(vg, vid);
719 return br_vlan_add_existing(br, vg, vlan, flags, changed,
722 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
726 vlan->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
732 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
733 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
735 if (flags & BRIDGE_VLAN_INFO_BRENTRY)
736 refcount_set(&vlan->refcnt, 1);
737 ret = __vlan_add(vlan, flags, extack);
739 free_percpu(vlan->stats);
748 /* Must be protected by RTNL.
749 * Must be called with vid in range from 1 to 4094 inclusive.
751 int br_vlan_delete(struct net_bridge *br, u16 vid)
753 struct net_bridge_vlan_group *vg;
754 struct net_bridge_vlan *v;
758 vg = br_vlan_group(br);
759 v = br_vlan_find(vg, vid);
760 if (!v || !br_vlan_is_brentry(v))
763 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
764 br_fdb_delete_by_port(br, NULL, vid, 0);
766 vlan_tunnel_info_del(vg, v);
768 return __vlan_del(v);
771 void br_vlan_flush(struct net_bridge *br)
773 struct net_bridge_vlan_group *vg;
777 vg = br_vlan_group(br);
778 __vlan_flush(br, NULL, vg);
779 RCU_INIT_POINTER(br->vlgrp, NULL);
781 __vlan_group_free(vg);
784 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
789 return br_vlan_lookup(&vg->vlan_hash, vid);
792 /* Must be protected by RTNL. */
793 static void recalculate_group_addr(struct net_bridge *br)
795 if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
798 spin_lock_bh(&br->lock);
799 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
800 br->vlan_proto == htons(ETH_P_8021Q)) {
801 /* Bridge Group Address */
802 br->group_addr[5] = 0x00;
803 } else { /* vlan_enabled && ETH_P_8021AD */
804 /* Provider Bridge Group Address */
805 br->group_addr[5] = 0x08;
807 spin_unlock_bh(&br->lock);
810 /* Must be protected by RTNL. */
811 void br_recalculate_fwd_mask(struct net_bridge *br)
813 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
814 br->vlan_proto == htons(ETH_P_8021Q))
815 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
816 else /* vlan_enabled && ETH_P_8021AD */
817 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
818 ~(1u << br->group_addr[5]);
821 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
822 struct netlink_ext_ack *extack)
824 struct switchdev_attr attr = {
826 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
827 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
828 .u.vlan_filtering = val,
832 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
835 err = switchdev_port_attr_set(br->dev, &attr, extack);
836 if (err && err != -EOPNOTSUPP)
839 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
840 br_manage_promisc(br);
841 recalculate_group_addr(br);
842 br_recalculate_fwd_mask(br);
843 if (!val && br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
844 br_info(br, "vlan filtering disabled, automatically disabling multicast vlan snooping\n");
845 br_multicast_toggle_vlan_snooping(br, false, NULL);
851 bool br_vlan_enabled(const struct net_device *dev)
853 struct net_bridge *br = netdev_priv(dev);
855 return br_opt_get(br, BROPT_VLAN_ENABLED);
857 EXPORT_SYMBOL_GPL(br_vlan_enabled);
859 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
861 struct net_bridge *br = netdev_priv(dev);
863 *p_proto = ntohs(br->vlan_proto);
867 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
869 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
870 struct netlink_ext_ack *extack)
872 struct switchdev_attr attr = {
874 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_PROTOCOL,
875 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
876 .u.vlan_protocol = ntohs(proto),
879 struct net_bridge_port *p;
880 struct net_bridge_vlan *vlan;
881 struct net_bridge_vlan_group *vg;
882 __be16 oldproto = br->vlan_proto;
884 if (br->vlan_proto == proto)
887 err = switchdev_port_attr_set(br->dev, &attr, extack);
888 if (err && err != -EOPNOTSUPP)
891 /* Add VLANs for the new proto to 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 err = vlan_vid_add(p->dev, proto, vlan->vid);
901 br->vlan_proto = proto;
903 recalculate_group_addr(br);
904 br_recalculate_fwd_mask(br);
906 /* Delete VLANs for the old proto from the device filter. */
907 list_for_each_entry(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, oldproto, vlan->vid);
916 attr.u.vlan_protocol = ntohs(oldproto);
917 switchdev_port_attr_set(br->dev, &attr, NULL);
919 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
920 vlan_vid_del(p->dev, proto, vlan->vid);
922 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
923 vg = nbp_vlan_group(p);
924 list_for_each_entry(vlan, &vg->vlan_list, vlist)
925 vlan_vid_del(p->dev, proto, vlan->vid);
931 int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
932 struct netlink_ext_ack *extack)
934 if (!eth_type_vlan(htons(val)))
935 return -EPROTONOSUPPORT;
937 return __br_vlan_set_proto(br, htons(val), extack);
940 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
945 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
954 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
956 struct net_bridge_port *p;
958 /* allow to change the option if there are no port vlans configured */
959 list_for_each_entry(p, &br->port_list, list) {
960 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
969 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
978 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
980 struct net_bridge_vlan *v;
985 v = br_vlan_lookup(&vg->vlan_hash, vid);
986 if (v && br_vlan_should_use(v) &&
987 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
993 static void br_vlan_disable_default_pvid(struct net_bridge *br)
995 struct net_bridge_port *p;
996 u16 pvid = br->default_pvid;
998 /* Disable default_pvid on all ports where it is still
1001 if (vlan_default_pvid(br_vlan_group(br), pvid)) {
1002 if (!br_vlan_delete(br, pvid))
1003 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1006 list_for_each_entry(p, &br->port_list, list) {
1007 if (vlan_default_pvid(nbp_vlan_group(p), pvid) &&
1008 !nbp_vlan_delete(p, pvid))
1009 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1012 br->default_pvid = 0;
1015 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1016 struct netlink_ext_ack *extack)
1018 const struct net_bridge_vlan *pvent;
1019 struct net_bridge_vlan_group *vg;
1020 struct net_bridge_port *p;
1021 unsigned long *changed;
1027 br_vlan_disable_default_pvid(br);
1031 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
1035 old_pvid = br->default_pvid;
1037 /* Update default_pvid config only if we do not conflict with
1038 * user configuration.
1040 vg = br_vlan_group(br);
1041 pvent = br_vlan_find(vg, pvid);
1042 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
1043 (!pvent || !br_vlan_should_use(pvent))) {
1044 err = br_vlan_add(br, pvid,
1045 BRIDGE_VLAN_INFO_PVID |
1046 BRIDGE_VLAN_INFO_UNTAGGED |
1047 BRIDGE_VLAN_INFO_BRENTRY,
1052 if (br_vlan_delete(br, old_pvid))
1053 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN);
1054 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN);
1055 set_bit(0, changed);
1058 list_for_each_entry(p, &br->port_list, list) {
1059 /* Update default_pvid config only if we do not conflict with
1060 * user configuration.
1062 vg = nbp_vlan_group(p);
1064 !vlan_default_pvid(vg, old_pvid)) ||
1065 br_vlan_find(vg, pvid))
1068 err = nbp_vlan_add(p, pvid,
1069 BRIDGE_VLAN_INFO_PVID |
1070 BRIDGE_VLAN_INFO_UNTAGGED,
1074 if (nbp_vlan_delete(p, old_pvid))
1075 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN);
1076 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN);
1077 set_bit(p->port_no, changed);
1080 br->default_pvid = pvid;
1083 bitmap_free(changed);
1087 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1088 if (!test_bit(p->port_no, changed))
1092 nbp_vlan_add(p, old_pvid,
1093 BRIDGE_VLAN_INFO_PVID |
1094 BRIDGE_VLAN_INFO_UNTAGGED,
1096 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN);
1098 nbp_vlan_delete(p, pvid);
1099 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1102 if (test_bit(0, changed)) {
1104 br_vlan_add(br, old_pvid,
1105 BRIDGE_VLAN_INFO_PVID |
1106 BRIDGE_VLAN_INFO_UNTAGGED |
1107 BRIDGE_VLAN_INFO_BRENTRY,
1109 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN);
1111 br_vlan_delete(br, pvid);
1112 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1117 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1118 struct netlink_ext_ack *extack)
1123 if (val >= VLAN_VID_MASK)
1126 if (pvid == br->default_pvid)
1129 /* Only allow default pvid change when filtering is disabled */
1130 if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1131 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1135 err = __br_vlan_set_default_pvid(br, pvid, extack);
1140 int br_vlan_init(struct net_bridge *br)
1142 struct net_bridge_vlan_group *vg;
1145 vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1148 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1151 ret = vlan_tunnel_init(vg);
1153 goto err_tunnel_init;
1154 INIT_LIST_HEAD(&vg->vlan_list);
1155 br->vlan_proto = htons(ETH_P_8021Q);
1156 br->default_pvid = 1;
1157 rcu_assign_pointer(br->vlgrp, vg);
1163 rhashtable_destroy(&vg->vlan_hash);
1170 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1172 struct switchdev_attr attr = {
1173 .orig_dev = p->br->dev,
1174 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1175 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1176 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1178 struct net_bridge_vlan_group *vg;
1181 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1185 ret = switchdev_port_attr_set(p->dev, &attr, extack);
1186 if (ret && ret != -EOPNOTSUPP)
1187 goto err_vlan_enabled;
1189 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1192 ret = vlan_tunnel_init(vg);
1194 goto err_tunnel_init;
1195 INIT_LIST_HEAD(&vg->vlan_list);
1196 rcu_assign_pointer(p->vlgrp, vg);
1197 if (p->br->default_pvid) {
1200 ret = nbp_vlan_add(p, p->br->default_pvid,
1201 BRIDGE_VLAN_INFO_PVID |
1202 BRIDGE_VLAN_INFO_UNTAGGED,
1206 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN);
1212 RCU_INIT_POINTER(p->vlgrp, NULL);
1214 vlan_tunnel_deinit(vg);
1216 rhashtable_destroy(&vg->vlan_hash);
1224 /* Must be protected by RTNL.
1225 * Must be called with vid in range from 1 to 4094 inclusive.
1226 * changed must be true only if the vlan was created or updated
1228 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1229 bool *changed, struct netlink_ext_ack *extack)
1231 struct net_bridge_vlan *vlan;
1237 vlan = br_vlan_find(nbp_vlan_group(port), vid);
1239 /* Pass the flags to the hardware bridge */
1240 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
1241 if (ret && ret != -EOPNOTSUPP)
1243 *changed = __vlan_add_flags(vlan, flags);
1248 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1254 ret = __vlan_add(vlan, flags, extack);
1263 /* Must be protected by RTNL.
1264 * Must be called with vid in range from 1 to 4094 inclusive.
1266 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1268 struct net_bridge_vlan *v;
1272 v = br_vlan_find(nbp_vlan_group(port), vid);
1275 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1276 br_fdb_delete_by_port(port->br, port, vid, 0);
1278 return __vlan_del(v);
1281 void nbp_vlan_flush(struct net_bridge_port *port)
1283 struct net_bridge_vlan_group *vg;
1287 vg = nbp_vlan_group(port);
1288 __vlan_flush(port->br, port, vg);
1289 RCU_INIT_POINTER(port->vlgrp, NULL);
1291 __vlan_group_free(vg);
1294 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1295 struct pcpu_sw_netstats *stats)
1299 memset(stats, 0, sizeof(*stats));
1300 for_each_possible_cpu(i) {
1301 u64 rxpackets, rxbytes, txpackets, txbytes;
1302 struct pcpu_sw_netstats *cpu_stats;
1305 cpu_stats = per_cpu_ptr(v->stats, i);
1307 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1308 rxpackets = cpu_stats->rx_packets;
1309 rxbytes = cpu_stats->rx_bytes;
1310 txbytes = cpu_stats->tx_bytes;
1311 txpackets = cpu_stats->tx_packets;
1312 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1314 stats->rx_packets += rxpackets;
1315 stats->rx_bytes += rxbytes;
1316 stats->tx_bytes += txbytes;
1317 stats->tx_packets += txpackets;
1321 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1323 struct net_bridge_vlan_group *vg;
1324 struct net_bridge_port *p;
1327 p = br_port_get_check_rtnl(dev);
1329 vg = nbp_vlan_group(p);
1330 else if (netif_is_bridge_master(dev))
1331 vg = br_vlan_group(netdev_priv(dev));
1335 *p_pvid = br_get_pvid(vg);
1338 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1340 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
1342 struct net_bridge_vlan_group *vg;
1343 struct net_bridge_port *p;
1345 p = br_port_get_check_rcu(dev);
1347 vg = nbp_vlan_group_rcu(p);
1348 else if (netif_is_bridge_master(dev))
1349 vg = br_vlan_group_rcu(netdev_priv(dev));
1353 *p_pvid = br_get_pvid(vg);
1356 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
1358 void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1359 struct net_device_path_ctx *ctx,
1360 struct net_device_path *path)
1362 struct net_bridge_vlan_group *vg;
1363 int idx = ctx->num_vlans - 1;
1366 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP;
1368 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
1371 vg = br_vlan_group(br);
1374 ctx->vlan[idx].proto == br->vlan_proto) {
1375 vid = ctx->vlan[idx].id;
1377 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_TAG;
1378 vid = br_get_pvid(vg);
1381 path->bridge.vlan_id = vid;
1382 path->bridge.vlan_proto = br->vlan_proto;
1385 int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1386 struct net_bridge_port *dst,
1387 struct net_device_path *path)
1389 struct net_bridge_vlan_group *vg;
1390 struct net_bridge_vlan *v;
1392 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
1395 vg = nbp_vlan_group_rcu(dst);
1396 v = br_vlan_find(vg, path->bridge.vlan_id);
1397 if (!v || !br_vlan_should_use(v))
1400 if (!(v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
1403 if (path->bridge.vlan_mode == DEV_PATH_BR_VLAN_TAG)
1404 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_KEEP;
1405 else if (v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)
1406 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG_HW;
1408 path->bridge.vlan_mode = DEV_PATH_BR_VLAN_UNTAG;
1413 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1414 struct bridge_vlan_info *p_vinfo)
1416 struct net_bridge_vlan_group *vg;
1417 struct net_bridge_vlan *v;
1418 struct net_bridge_port *p;
1421 p = br_port_get_check_rtnl(dev);
1423 vg = nbp_vlan_group(p);
1424 else if (netif_is_bridge_master(dev))
1425 vg = br_vlan_group(netdev_priv(dev));
1429 v = br_vlan_find(vg, vid);
1434 p_vinfo->flags = v->flags;
1435 if (vid == br_get_pvid(vg))
1436 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1439 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1441 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1443 return is_vlan_dev(dev) &&
1444 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1447 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1448 __always_unused struct netdev_nested_priv *priv)
1450 return br_vlan_is_bind_vlan_dev(dev);
1453 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1458 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1465 struct br_vlan_bind_walk_data {
1467 struct net_device *result;
1470 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1471 struct netdev_nested_priv *priv)
1473 struct br_vlan_bind_walk_data *data = priv->data;
1476 if (br_vlan_is_bind_vlan_dev(dev) &&
1477 vlan_dev_priv(dev)->vlan_id == data->vid) {
1485 static struct net_device *
1486 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1488 struct br_vlan_bind_walk_data data = {
1491 struct netdev_nested_priv priv = {
1492 .data = (void *)&data,
1496 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1503 static bool br_vlan_is_dev_up(const struct net_device *dev)
1505 return !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1508 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1509 struct net_device *vlan_dev)
1511 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1512 struct net_bridge_vlan_group *vg;
1513 struct net_bridge_port *p;
1514 bool has_carrier = false;
1516 if (!netif_carrier_ok(br->dev)) {
1517 netif_carrier_off(vlan_dev);
1521 list_for_each_entry(p, &br->port_list, list) {
1522 vg = nbp_vlan_group(p);
1523 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1530 netif_carrier_on(vlan_dev);
1532 netif_carrier_off(vlan_dev);
1535 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1537 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1538 struct net_bridge_vlan *vlan;
1539 struct net_device *vlan_dev;
1541 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1542 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1545 if (br_vlan_is_dev_up(p->dev)) {
1546 if (netif_carrier_ok(p->br->dev))
1547 netif_carrier_on(vlan_dev);
1549 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1555 static void br_vlan_upper_change(struct net_device *dev,
1556 struct net_device *upper_dev,
1559 struct net_bridge *br = netdev_priv(dev);
1561 if (!br_vlan_is_bind_vlan_dev(upper_dev))
1565 br_vlan_set_vlan_dev_state(br, upper_dev);
1566 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1568 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1569 br_vlan_has_upper_bind_vlan_dev(dev));
1573 struct br_vlan_link_state_walk_data {
1574 struct net_bridge *br;
1577 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1578 struct netdev_nested_priv *priv)
1580 struct br_vlan_link_state_walk_data *data = priv->data;
1582 if (br_vlan_is_bind_vlan_dev(vlan_dev))
1583 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1588 static void br_vlan_link_state_change(struct net_device *dev,
1589 struct net_bridge *br)
1591 struct br_vlan_link_state_walk_data data = {
1594 struct netdev_nested_priv priv = {
1595 .data = (void *)&data,
1599 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1604 /* Must be protected by RTNL. */
1605 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1607 struct net_device *vlan_dev;
1609 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1612 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1614 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1617 /* Must be protected by RTNL. */
1618 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr)
1620 struct netdev_notifier_changeupper_info *info;
1621 struct net_bridge *br = netdev_priv(dev);
1622 int vlcmd = 0, ret = 0;
1623 bool changed = false;
1626 case NETDEV_REGISTER:
1627 ret = br_vlan_add(br, br->default_pvid,
1628 BRIDGE_VLAN_INFO_PVID |
1629 BRIDGE_VLAN_INFO_UNTAGGED |
1630 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1631 vlcmd = RTM_NEWVLAN;
1633 case NETDEV_UNREGISTER:
1634 changed = !br_vlan_delete(br, br->default_pvid);
1635 vlcmd = RTM_DELVLAN;
1637 case NETDEV_CHANGEUPPER:
1639 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1644 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1646 br_vlan_link_state_change(dev, br);
1650 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd);
1655 /* Must be protected by RTNL. */
1656 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1658 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1665 br_vlan_set_all_vlan_dev_state(p);
1670 static bool br_vlan_stats_fill(struct sk_buff *skb,
1671 const struct net_bridge_vlan *v)
1673 struct pcpu_sw_netstats stats;
1674 struct nlattr *nest;
1676 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS);
1680 br_vlan_get_stats(v, &stats);
1681 if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes,
1682 BRIDGE_VLANDB_STATS_PAD) ||
1683 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS,
1684 stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) ||
1685 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes,
1686 BRIDGE_VLANDB_STATS_PAD) ||
1687 nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS,
1688 stats.tx_packets, BRIDGE_VLANDB_STATS_PAD))
1691 nla_nest_end(skb, nest);
1696 nla_nest_cancel(skb, nest);
1700 /* v_opts is used to dump the options which must be equal in the whole range */
1701 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range,
1702 const struct net_bridge_vlan *v_opts,
1706 struct bridge_vlan_info info;
1707 struct nlattr *nest;
1709 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY);
1713 memset(&info, 0, sizeof(info));
1715 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
1716 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1717 if (flags & BRIDGE_VLAN_INFO_PVID)
1718 info.flags |= BRIDGE_VLAN_INFO_PVID;
1720 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info))
1723 if (vid_range && vid < vid_range &&
1724 !(flags & BRIDGE_VLAN_INFO_PVID) &&
1725 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range))
1729 if (!br_vlan_opts_fill(skb, v_opts))
1732 if (dump_stats && !br_vlan_stats_fill(skb, v_opts))
1736 nla_nest_end(skb, nest);
1741 nla_nest_cancel(skb, nest);
1745 static size_t rtnl_vlan_nlmsg_size(void)
1747 return NLMSG_ALIGN(sizeof(struct br_vlan_msg))
1748 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */
1749 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */
1750 + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */
1751 + br_vlan_opts_nl_size(); /* bridge vlan options */
1754 void br_vlan_notify(const struct net_bridge *br,
1755 const struct net_bridge_port *p,
1756 u16 vid, u16 vid_range,
1759 struct net_bridge_vlan_group *vg;
1760 struct net_bridge_vlan *v = NULL;
1761 struct br_vlan_msg *bvm;
1762 struct nlmsghdr *nlh;
1763 struct sk_buff *skb;
1769 /* right now notifications are done only with rtnl held */
1773 ifindex = p->dev->ifindex;
1774 vg = nbp_vlan_group(p);
1775 net = dev_net(p->dev);
1777 ifindex = br->dev->ifindex;
1778 vg = br_vlan_group(br);
1779 net = dev_net(br->dev);
1782 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL);
1787 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0);
1790 bvm = nlmsg_data(nlh);
1791 memset(bvm, 0, sizeof(*bvm));
1792 bvm->family = AF_BRIDGE;
1793 bvm->ifindex = ifindex;
1797 /* need to find the vlan due to flags/options */
1798 v = br_vlan_find(vg, vid);
1799 if (!v || !br_vlan_should_use(v))
1803 if (br_get_pvid(vg) == v->vid)
1804 flags |= BRIDGE_VLAN_INFO_PVID;
1812 if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false))
1815 nlmsg_end(skb, nlh);
1816 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL);
1820 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err);
1825 static int br_vlan_replay_one(struct notifier_block *nb,
1826 struct net_device *dev,
1827 struct switchdev_obj_port_vlan *vlan,
1828 const void *ctx, unsigned long action,
1829 struct netlink_ext_ack *extack)
1831 struct switchdev_notifier_port_obj_info obj_info = {
1841 err = nb->notifier_call(nb, action, &obj_info);
1842 return notifier_to_errno(err);
1845 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev,
1846 const void *ctx, bool adding, struct notifier_block *nb,
1847 struct netlink_ext_ack *extack)
1849 struct net_bridge_vlan_group *vg;
1850 struct net_bridge_vlan *v;
1851 struct net_bridge_port *p;
1852 struct net_bridge *br;
1853 unsigned long action;
1862 if (!netif_is_bridge_master(br_dev))
1865 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
1868 if (netif_is_bridge_master(dev)) {
1869 br = netdev_priv(dev);
1870 vg = br_vlan_group(br);
1873 p = br_port_get_rtnl(dev);
1876 vg = nbp_vlan_group(p);
1884 action = SWITCHDEV_PORT_OBJ_ADD;
1886 action = SWITCHDEV_PORT_OBJ_DEL;
1888 pvid = br_get_pvid(vg);
1890 list_for_each_entry(v, &vg->vlan_list, vlist) {
1891 struct switchdev_obj_port_vlan vlan = {
1892 .obj.orig_dev = dev,
1893 .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN,
1894 .flags = br_vlan_flags(v, pvid),
1898 if (!br_vlan_should_use(v))
1901 err = br_vlan_replay_one(nb, dev, &vlan, ctx, action, extack);
1909 /* check if v_curr can enter a range ending in range_end */
1910 bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1911 const struct net_bridge_vlan *range_end)
1913 return v_curr->vid - range_end->vid == 1 &&
1914 range_end->flags == v_curr->flags &&
1915 br_vlan_opts_eq_range(v_curr, range_end);
1918 static int br_vlan_dump_dev(const struct net_device *dev,
1919 struct sk_buff *skb,
1920 struct netlink_callback *cb,
1923 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL;
1924 bool dump_global = !!(dump_flags & BRIDGE_VLANDB_DUMPF_GLOBAL);
1925 bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS);
1926 struct net_bridge_vlan_group *vg;
1927 int idx = 0, s_idx = cb->args[1];
1928 struct nlmsghdr *nlh = NULL;
1929 struct net_bridge_port *p;
1930 struct br_vlan_msg *bvm;
1931 struct net_bridge *br;
1935 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
1938 if (netif_is_bridge_master(dev)) {
1939 br = netdev_priv(dev);
1940 vg = br_vlan_group_rcu(br);
1943 /* global options are dumped only for bridge devices */
1947 p = br_port_get_rcu(dev);
1950 vg = nbp_vlan_group_rcu(p);
1957 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1958 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI);
1961 bvm = nlmsg_data(nlh);
1962 memset(bvm, 0, sizeof(*bvm));
1963 bvm->family = PF_BRIDGE;
1964 bvm->ifindex = dev->ifindex;
1965 pvid = br_get_pvid(vg);
1967 /* idx must stay at range's beginning until it is filled in */
1968 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
1969 if (!dump_global && !br_vlan_should_use(v))
1983 if (br_vlan_global_opts_can_enter_range(v, range_end))
1985 if (!br_vlan_global_opts_fill(skb, range_start->vid,
1991 /* advance number of filled vlans */
1992 idx += range_end->vid - range_start->vid + 1;
1995 } else if (dump_stats || v->vid == pvid ||
1996 !br_vlan_can_enter_range(v, range_end)) {
1997 u16 vlan_flags = br_vlan_flags(range_start, pvid);
1999 if (!br_vlan_fill_vids(skb, range_start->vid,
2000 range_end->vid, range_start,
2001 vlan_flags, dump_stats)) {
2005 /* advance number of filled vlans */
2006 idx += range_end->vid - range_start->vid + 1;
2013 /* err will be 0 and range_start will be set in 3 cases here:
2014 * - first vlan (range_start == range_end)
2015 * - last vlan (range_start == range_end, not in range)
2016 * - last vlan range (range_start != range_end, in range)
2018 if (!err && range_start) {
2020 !br_vlan_global_opts_fill(skb, range_start->vid,
2021 range_end->vid, range_start))
2023 else if (!dump_global &&
2024 !br_vlan_fill_vids(skb, range_start->vid,
2025 range_end->vid, range_start,
2026 br_vlan_flags(range_start, pvid),
2031 cb->args[1] = err ? idx : 0;
2033 nlmsg_end(skb, nlh);
2038 static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = {
2039 [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 },
2042 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb)
2044 struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1];
2045 int idx = 0, err = 0, s_idx = cb->args[0];
2046 struct net *net = sock_net(skb->sk);
2047 struct br_vlan_msg *bvm;
2048 struct net_device *dev;
2051 err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX,
2052 br_vlan_db_dump_pol, cb->extack);
2056 bvm = nlmsg_data(cb->nlh);
2057 if (dtb[BRIDGE_VLANDB_DUMP_FLAGS])
2058 dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]);
2062 dev = dev_get_by_index_rcu(net, bvm->ifindex);
2067 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
2068 if (err && err != -EMSGSIZE)
2071 for_each_netdev_rcu(net, dev) {
2075 err = br_vlan_dump_dev(dev, skb, cb, dump_flags);
2076 if (err == -EMSGSIZE)
2093 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = {
2094 [BRIDGE_VLANDB_ENTRY_INFO] =
2095 NLA_POLICY_EXACT_LEN(sizeof(struct bridge_vlan_info)),
2096 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 },
2097 [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 },
2098 [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED },
2101 static int br_vlan_rtm_process_one(struct net_device *dev,
2102 const struct nlattr *attr,
2103 int cmd, struct netlink_ext_ack *extack)
2105 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL;
2106 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
2107 bool changed = false, skip_processing = false;
2108 struct net_bridge_vlan_group *vg;
2109 struct net_bridge_port *p = NULL;
2110 int err = 0, cmdmap = 0;
2111 struct net_bridge *br;
2113 if (netif_is_bridge_master(dev)) {
2114 br = netdev_priv(dev);
2115 vg = br_vlan_group(br);
2117 p = br_port_get_rtnl(dev);
2121 vg = nbp_vlan_group(p);
2127 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr,
2128 br_vlan_db_policy, extack);
2132 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) {
2133 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info");
2136 memset(&vrange_end, 0, sizeof(vrange_end));
2138 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
2139 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
2140 BRIDGE_VLAN_INFO_RANGE_END)) {
2141 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls");
2144 if (!br_vlan_valid_id(vinfo->vid, extack))
2147 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) {
2148 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]);
2149 /* validate user-provided flags without RANGE_BEGIN */
2150 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags;
2151 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
2153 /* vinfo_last is the range start, vinfo the range end */
2155 vinfo = &vrange_end;
2157 if (!br_vlan_valid_id(vinfo->vid, extack) ||
2158 !br_vlan_valid_range(vinfo, vinfo_last, extack))
2164 cmdmap = RTM_SETLINK;
2165 skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS);
2168 cmdmap = RTM_DELLINK;
2172 if (!skip_processing) {
2173 struct bridge_vlan_info *tmp_last = vinfo_last;
2175 /* br_process_vlan_info may overwrite vinfo_last */
2176 err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last,
2179 /* notify first if anything changed */
2181 br_ifinfo_notify(cmdmap, br, p);
2187 /* deal with options */
2188 if (cmd == RTM_NEWVLAN) {
2189 struct net_bridge_vlan *range_start, *range_end;
2192 range_start = br_vlan_find(vg, vinfo_last->vid);
2193 range_end = br_vlan_find(vg, vinfo->vid);
2195 range_start = br_vlan_find(vg, vinfo->vid);
2196 range_end = range_start;
2199 err = br_vlan_process_options(br, p, range_start, range_end,
2206 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh,
2207 struct netlink_ext_ack *extack)
2209 struct net *net = sock_net(skb->sk);
2210 struct br_vlan_msg *bvm;
2211 struct net_device *dev;
2212 struct nlattr *attr;
2216 /* this should validate the header and check for remaining bytes */
2217 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL,
2222 bvm = nlmsg_data(nlh);
2223 dev = __dev_get_by_index(net, bvm->ifindex);
2227 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) {
2228 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port");
2232 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) {
2233 switch (nla_type(attr)) {
2234 case BRIDGE_VLANDB_ENTRY:
2235 err = br_vlan_rtm_process_one(dev, attr,
2239 case BRIDGE_VLANDB_GLOBAL_OPTIONS:
2240 err = br_vlan_rtm_process_global_options(dev, attr,
2253 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process");
2260 void br_vlan_rtnl_init(void)
2262 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL,
2263 br_vlan_rtm_dump, 0);
2264 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN,
2265 br_vlan_rtm_process, NULL, 0);
2266 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN,
2267 br_vlan_rtm_process, NULL, 0);
2270 void br_vlan_rtnl_uninit(void)
2272 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN);
2273 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN);
2274 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN);