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, u16 vid)
48 static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
59 /* return true if anything changed, false otherwise */
60 static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
62 struct net_bridge_vlan_group *vg;
63 u16 old_flags = v->flags;
66 if (br_vlan_is_master(v))
67 vg = br_vlan_group(v->br);
69 vg = nbp_vlan_group(v->port);
71 if (flags & BRIDGE_VLAN_INFO_PVID)
72 ret = __vlan_add_pvid(vg, v->vid);
74 ret = __vlan_delete_pvid(vg, v->vid);
76 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
77 v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
79 v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
81 return ret || !!(old_flags ^ v->flags);
84 static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
85 struct net_bridge_vlan *v, u16 flags,
86 struct netlink_ext_ack *extack)
90 /* Try switchdev op first. In case it is not supported, fallback to
93 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
94 if (err == -EOPNOTSUPP)
95 return vlan_vid_add(dev, br->vlan_proto, v->vid);
96 v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV;
100 static void __vlan_add_list(struct net_bridge_vlan *v)
102 struct net_bridge_vlan_group *vg;
103 struct list_head *headp, *hpos;
104 struct net_bridge_vlan *vent;
106 if (br_vlan_is_master(v))
107 vg = br_vlan_group(v->br);
109 vg = nbp_vlan_group(v->port);
111 headp = &vg->vlan_list;
112 list_for_each_prev(hpos, headp) {
113 vent = list_entry(hpos, struct net_bridge_vlan, vlist);
114 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 a
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 call_rcu(&masterv->rcu, br_master_vlan_rcu_free);
197 static void nbp_vlan_rcu_free(struct rcu_head *rcu)
199 struct net_bridge_vlan *v;
201 v = container_of(rcu, struct net_bridge_vlan, rcu);
202 WARN_ON(br_vlan_is_master(v));
203 /* if we had per-port stats configured then free them here */
204 if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS)
205 free_percpu(v->stats);
210 /* This is the shared VLAN add function which works for both ports and bridge
211 * devices. There are four possible calls to this function in terms of the
213 * 1. vlan is being added on a port (no master flags, global entry exists)
214 * 2. vlan is being added on a bridge (both master and brentry flags)
215 * 3. vlan is being added on a port, but a global entry didn't exist which
216 * is being created right now (master flag set, brentry flag unset), the
217 * global entry is used for global per-vlan features, but not for filtering
218 * 4. same as 3 but with both master and brentry flags set so the entry
219 * will be used for filtering in both the port and the bridge
221 static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
222 struct netlink_ext_ack *extack)
224 struct net_bridge_vlan *masterv = NULL;
225 struct net_bridge_port *p = NULL;
226 struct net_bridge_vlan_group *vg;
227 struct net_device *dev;
228 struct net_bridge *br;
231 if (br_vlan_is_master(v)) {
234 vg = br_vlan_group(br);
239 vg = nbp_vlan_group(p);
243 /* Add VLAN to the device filter if it is supported.
244 * This ensures tagged traffic enters the bridge when
245 * promiscuous mode is disabled by br_manage_promisc().
247 err = __vlan_vid_add(dev, br, v, flags, extack);
251 /* need to work on the master vlan too */
252 if (flags & BRIDGE_VLAN_INFO_MASTER) {
255 err = br_vlan_add(br, v->vid,
256 flags | BRIDGE_VLAN_INFO_BRENTRY,
262 br_vlan_notify(br, NULL, v->vid, 0,
266 masterv = br_vlan_get_master(br, v->vid, extack);
270 if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) {
271 v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
276 v->priv_flags |= BR_VLFLAG_PER_PORT_STATS;
278 v->stats = masterv->stats;
281 err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
282 if (err && err != -EOPNOTSUPP)
286 /* Add the dev mac and count the vlan only if it's usable */
287 if (br_vlan_should_use(v)) {
288 err = br_fdb_insert(br, p, dev->dev_addr, v->vid);
290 br_err(br, "failed insert local address into bridge forwarding table\n");
296 err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
302 __vlan_add_flags(v, flags);
305 nbp_vlan_set_vlan_dev_state(p, v->vid);
310 if (br_vlan_should_use(v)) {
311 br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid);
317 __vlan_vid_del(dev, br, v);
319 if (v->stats && masterv->stats != v->stats)
320 free_percpu(v->stats);
323 br_vlan_put_master(masterv);
327 br_switchdev_port_vlan_del(dev, v->vid);
333 static int __vlan_del(struct net_bridge_vlan *v)
335 struct net_bridge_vlan *masterv = v;
336 struct net_bridge_vlan_group *vg;
337 struct net_bridge_port *p = NULL;
340 if (br_vlan_is_master(v)) {
341 vg = br_vlan_group(v->br);
344 vg = nbp_vlan_group(v->port);
348 __vlan_delete_pvid(vg, v->vid);
350 err = __vlan_vid_del(p->dev, p->br, v);
354 err = br_switchdev_port_vlan_del(v->br->dev, v->vid);
355 if (err && err != -EOPNOTSUPP)
360 if (br_vlan_should_use(v)) {
361 v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY;
366 vlan_tunnel_info_del(vg, v);
367 rhashtable_remove_fast(&vg->vlan_hash, &v->vnode,
370 nbp_vlan_set_vlan_dev_state(p, v->vid);
371 call_rcu(&v->rcu, nbp_vlan_rcu_free);
374 br_vlan_put_master(masterv);
379 static void __vlan_group_free(struct net_bridge_vlan_group *vg)
381 WARN_ON(!list_empty(&vg->vlan_list));
382 rhashtable_destroy(&vg->vlan_hash);
383 vlan_tunnel_deinit(vg);
387 static void __vlan_flush(const struct net_bridge *br,
388 const struct net_bridge_port *p,
389 struct net_bridge_vlan_group *vg)
391 struct net_bridge_vlan *vlan, *tmp;
392 u16 v_start = 0, v_end = 0;
394 __vlan_delete_pvid(vg, vg->pvid);
395 list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
396 /* take care of disjoint ranges */
399 } else if (vlan->vid - v_end != 1) {
400 /* found range end, notify and start next one */
401 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
409 /* notify about the last/whole vlan range */
411 br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN);
414 struct sk_buff *br_handle_vlan(struct net_bridge *br,
415 const struct net_bridge_port *p,
416 struct net_bridge_vlan_group *vg,
419 struct br_vlan_stats *stats;
420 struct net_bridge_vlan *v;
423 /* If this packet was not filtered at input, let it pass */
424 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
427 /* At this point, we know that the frame was filtered and contains
428 * a valid vlan id. If the vlan id has untagged flag set,
429 * send untagged; otherwise, send tagged.
431 br_vlan_get_tag(skb, &vid);
432 v = br_vlan_find(vg, vid);
433 /* Vlan entry must be configured at this point. The
434 * only exception is the bridge is set in promisc mode and the
435 * packet is destined for the bridge device. In this case
436 * pass the packet as is.
438 if (!v || !br_vlan_should_use(v)) {
439 if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
446 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
447 stats = this_cpu_ptr(v->stats);
448 u64_stats_update_begin(&stats->syncp);
449 stats->tx_bytes += skb->len;
451 u64_stats_update_end(&stats->syncp);
454 if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
455 __vlan_hwaccel_clear_tag(skb);
457 if (p && (p->flags & BR_VLAN_TUNNEL) &&
458 br_handle_egress_vlan_tunnel(skb, v)) {
466 /* Called under RCU */
467 static bool __allowed_ingress(const struct net_bridge *br,
468 struct net_bridge_vlan_group *vg,
469 struct sk_buff *skb, u16 *vid)
471 struct br_vlan_stats *stats;
472 struct net_bridge_vlan *v;
475 BR_INPUT_SKB_CB(skb)->vlan_filtered = true;
476 /* If vlan tx offload is disabled on bridge device and frame was
477 * sent from vlan device on the bridge device, it does not have
478 * HW accelerated vlan tag.
480 if (unlikely(!skb_vlan_tag_present(skb) &&
481 skb->protocol == br->vlan_proto)) {
482 skb = skb_vlan_untag(skb);
487 if (!br_vlan_get_tag(skb, vid)) {
489 if (skb->vlan_proto != br->vlan_proto) {
490 /* Protocol-mismatch, empty out vlan_tci for new tag */
491 skb_push(skb, ETH_HLEN);
492 skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto,
493 skb_vlan_tag_get(skb));
497 skb_pull(skb, ETH_HLEN);
498 skb_reset_mac_len(skb);
510 u16 pvid = br_get_pvid(vg);
512 /* Frame had a tag with VID 0 or did not have a tag.
513 * See if pvid is set on this port. That tells us which
514 * vlan untagged or priority-tagged traffic belongs to.
519 /* PVID is set on this port. Any untagged or priority-tagged
520 * ingress frame is considered to belong to this vlan.
524 /* Untagged Frame. */
525 __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid);
527 /* Priority-tagged Frame.
528 * At this point, we know that skb->vlan_tci VID
530 * We update only VID field and preserve PCP field.
532 skb->vlan_tci |= pvid;
534 /* if stats are disabled we can avoid the lookup */
535 if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED))
538 v = br_vlan_find(vg, *vid);
539 if (!v || !br_vlan_should_use(v))
542 if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) {
543 stats = this_cpu_ptr(v->stats);
544 u64_stats_update_begin(&stats->syncp);
545 stats->rx_bytes += skb->len;
547 u64_stats_update_end(&stats->syncp);
557 bool br_allowed_ingress(const struct net_bridge *br,
558 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
561 /* If VLAN filtering is disabled on the bridge, all packets are
564 if (!br_opt_get(br, BROPT_VLAN_ENABLED)) {
565 BR_INPUT_SKB_CB(skb)->vlan_filtered = false;
569 return __allowed_ingress(br, vg, skb, vid);
572 /* Called under RCU. */
573 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
574 const struct sk_buff *skb)
576 const struct net_bridge_vlan *v;
579 /* If this packet was not filtered at input, let it pass */
580 if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
583 br_vlan_get_tag(skb, &vid);
584 v = br_vlan_find(vg, vid);
585 if (v && br_vlan_should_use(v))
591 /* Called under RCU */
592 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid)
594 struct net_bridge_vlan_group *vg;
595 struct net_bridge *br = p->br;
597 /* If filtering was disabled at input, let it pass. */
598 if (!br_opt_get(br, BROPT_VLAN_ENABLED))
601 vg = nbp_vlan_group_rcu(p);
602 if (!vg || !vg->num_vlans)
605 if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto)
609 *vid = br_get_pvid(vg);
616 if (br_vlan_find(vg, *vid))
622 static int br_vlan_add_existing(struct net_bridge *br,
623 struct net_bridge_vlan_group *vg,
624 struct net_bridge_vlan *vlan,
625 u16 flags, bool *changed,
626 struct netlink_ext_ack *extack)
630 err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
631 if (err && err != -EOPNOTSUPP)
634 if (!br_vlan_is_brentry(vlan)) {
635 /* Trying to change flags of non-existent bridge vlan */
636 if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
640 /* It was only kept for port vlans, now make it real */
641 err = br_fdb_insert(br, NULL, br->dev->dev_addr,
644 br_err(br, "failed to insert local address into bridge forwarding table\n");
648 refcount_inc(&vlan->refcnt);
649 vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY;
654 if (__vlan_add_flags(vlan, flags))
661 br_switchdev_port_vlan_del(br->dev, vlan->vid);
665 /* Must be protected by RTNL.
666 * Must be called with vid in range from 1 to 4094 inclusive.
667 * changed must be true only if the vlan was created or updated
669 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed,
670 struct netlink_ext_ack *extack)
672 struct net_bridge_vlan_group *vg;
673 struct net_bridge_vlan *vlan;
679 vg = br_vlan_group(br);
680 vlan = br_vlan_find(vg, vid);
682 return br_vlan_add_existing(br, vg, vlan, flags, changed,
685 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
689 vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats);
695 vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER;
696 vlan->flags &= ~BRIDGE_VLAN_INFO_PVID;
698 if (flags & BRIDGE_VLAN_INFO_BRENTRY)
699 refcount_set(&vlan->refcnt, 1);
700 ret = __vlan_add(vlan, flags, extack);
702 free_percpu(vlan->stats);
711 /* Must be protected by RTNL.
712 * Must be called with vid in range from 1 to 4094 inclusive.
714 int br_vlan_delete(struct net_bridge *br, u16 vid)
716 struct net_bridge_vlan_group *vg;
717 struct net_bridge_vlan *v;
721 vg = br_vlan_group(br);
722 v = br_vlan_find(vg, vid);
723 if (!v || !br_vlan_is_brentry(v))
726 br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
727 br_fdb_delete_by_port(br, NULL, vid, 0);
729 vlan_tunnel_info_del(vg, v);
731 return __vlan_del(v);
734 void br_vlan_flush(struct net_bridge *br)
736 struct net_bridge_vlan_group *vg;
740 vg = br_vlan_group(br);
741 __vlan_flush(br, NULL, vg);
742 RCU_INIT_POINTER(br->vlgrp, NULL);
744 __vlan_group_free(vg);
747 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid)
752 return br_vlan_lookup(&vg->vlan_hash, vid);
755 /* Must be protected by RTNL. */
756 static void recalculate_group_addr(struct net_bridge *br)
758 if (br_opt_get(br, BROPT_GROUP_ADDR_SET))
761 spin_lock_bh(&br->lock);
762 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
763 br->vlan_proto == htons(ETH_P_8021Q)) {
764 /* Bridge Group Address */
765 br->group_addr[5] = 0x00;
766 } else { /* vlan_enabled && ETH_P_8021AD */
767 /* Provider Bridge Group Address */
768 br->group_addr[5] = 0x08;
770 spin_unlock_bh(&br->lock);
773 /* Must be protected by RTNL. */
774 void br_recalculate_fwd_mask(struct net_bridge *br)
776 if (!br_opt_get(br, BROPT_VLAN_ENABLED) ||
777 br->vlan_proto == htons(ETH_P_8021Q))
778 br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT;
779 else /* vlan_enabled && ETH_P_8021AD */
780 br->group_fwd_mask_required = BR_GROUPFWD_8021AD &
781 ~(1u << br->group_addr[5]);
784 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
786 struct switchdev_attr attr = {
788 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
789 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
790 .u.vlan_filtering = val,
794 if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val)
797 err = switchdev_port_attr_set(br->dev, &attr);
798 if (err && err != -EOPNOTSUPP)
801 br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val);
802 br_manage_promisc(br);
803 recalculate_group_addr(br);
804 br_recalculate_fwd_mask(br);
809 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
811 return __br_vlan_filter_toggle(br, val);
814 bool br_vlan_enabled(const struct net_device *dev)
816 struct net_bridge *br = netdev_priv(dev);
818 return br_opt_get(br, BROPT_VLAN_ENABLED);
820 EXPORT_SYMBOL_GPL(br_vlan_enabled);
822 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto)
824 struct net_bridge *br = netdev_priv(dev);
826 *p_proto = ntohs(br->vlan_proto);
830 EXPORT_SYMBOL_GPL(br_vlan_get_proto);
832 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto)
835 struct net_bridge_port *p;
836 struct net_bridge_vlan *vlan;
837 struct net_bridge_vlan_group *vg;
840 if (br->vlan_proto == proto)
843 /* Add VLANs for the new proto to the device filter. */
844 list_for_each_entry(p, &br->port_list, list) {
845 vg = nbp_vlan_group(p);
846 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
847 err = vlan_vid_add(p->dev, proto, vlan->vid);
853 oldproto = br->vlan_proto;
854 br->vlan_proto = proto;
856 recalculate_group_addr(br);
857 br_recalculate_fwd_mask(br);
859 /* Delete VLANs for the old proto from the device filter. */
860 list_for_each_entry(p, &br->port_list, list) {
861 vg = nbp_vlan_group(p);
862 list_for_each_entry(vlan, &vg->vlan_list, vlist)
863 vlan_vid_del(p->dev, oldproto, vlan->vid);
869 list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist)
870 vlan_vid_del(p->dev, proto, vlan->vid);
872 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
873 vg = nbp_vlan_group(p);
874 list_for_each_entry(vlan, &vg->vlan_list, vlist)
875 vlan_vid_del(p->dev, proto, vlan->vid);
881 int br_vlan_set_proto(struct net_bridge *br, unsigned long val)
883 if (val != ETH_P_8021Q && val != ETH_P_8021AD)
884 return -EPROTONOSUPPORT;
886 return __br_vlan_set_proto(br, htons(val));
889 int br_vlan_set_stats(struct net_bridge *br, unsigned long val)
894 br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val);
903 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val)
905 struct net_bridge_port *p;
907 /* allow to change the option if there are no port vlans configured */
908 list_for_each_entry(p, &br->port_list, list) {
909 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
918 br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val);
927 static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid)
929 struct net_bridge_vlan *v;
934 v = br_vlan_lookup(&vg->vlan_hash, vid);
935 if (v && br_vlan_should_use(v) &&
936 (v->flags & BRIDGE_VLAN_INFO_UNTAGGED))
942 static void br_vlan_disable_default_pvid(struct net_bridge *br)
944 struct net_bridge_port *p;
945 u16 pvid = br->default_pvid;
947 /* Disable default_pvid on all ports where it is still
950 if (vlan_default_pvid(br_vlan_group(br), pvid)) {
951 if (!br_vlan_delete(br, pvid))
952 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
955 list_for_each_entry(p, &br->port_list, list) {
956 if (vlan_default_pvid(nbp_vlan_group(p), pvid) &&
957 !nbp_vlan_delete(p, pvid))
958 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
961 br->default_pvid = 0;
964 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
965 struct netlink_ext_ack *extack)
967 const struct net_bridge_vlan *pvent;
968 struct net_bridge_vlan_group *vg;
969 struct net_bridge_port *p;
970 unsigned long *changed;
976 br_vlan_disable_default_pvid(br);
980 changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL);
984 old_pvid = br->default_pvid;
986 /* Update default_pvid config only if we do not conflict with
987 * user configuration.
989 vg = br_vlan_group(br);
990 pvent = br_vlan_find(vg, pvid);
991 if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) &&
992 (!pvent || !br_vlan_should_use(pvent))) {
993 err = br_vlan_add(br, pvid,
994 BRIDGE_VLAN_INFO_PVID |
995 BRIDGE_VLAN_INFO_UNTAGGED |
996 BRIDGE_VLAN_INFO_BRENTRY,
1001 if (br_vlan_delete(br, old_pvid))
1002 br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN);
1003 br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN);
1004 set_bit(0, changed);
1007 list_for_each_entry(p, &br->port_list, list) {
1008 /* Update default_pvid config only if we do not conflict with
1009 * user configuration.
1011 vg = nbp_vlan_group(p);
1013 !vlan_default_pvid(vg, old_pvid)) ||
1014 br_vlan_find(vg, pvid))
1017 err = nbp_vlan_add(p, pvid,
1018 BRIDGE_VLAN_INFO_PVID |
1019 BRIDGE_VLAN_INFO_UNTAGGED,
1023 if (nbp_vlan_delete(p, old_pvid))
1024 br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN);
1025 br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN);
1026 set_bit(p->port_no, changed);
1029 br->default_pvid = pvid;
1032 bitmap_free(changed);
1036 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
1037 if (!test_bit(p->port_no, changed))
1041 nbp_vlan_add(p, old_pvid,
1042 BRIDGE_VLAN_INFO_PVID |
1043 BRIDGE_VLAN_INFO_UNTAGGED,
1045 br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN);
1047 nbp_vlan_delete(p, pvid);
1048 br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN);
1051 if (test_bit(0, changed)) {
1053 br_vlan_add(br, old_pvid,
1054 BRIDGE_VLAN_INFO_PVID |
1055 BRIDGE_VLAN_INFO_UNTAGGED |
1056 BRIDGE_VLAN_INFO_BRENTRY,
1058 br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN);
1060 br_vlan_delete(br, pvid);
1061 br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN);
1066 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val)
1071 if (val >= VLAN_VID_MASK)
1074 if (pvid == br->default_pvid)
1077 /* Only allow default pvid change when filtering is disabled */
1078 if (br_opt_get(br, BROPT_VLAN_ENABLED)) {
1079 pr_info_once("Please disable vlan filtering to change default_pvid\n");
1083 err = __br_vlan_set_default_pvid(br, pvid, NULL);
1088 int br_vlan_init(struct net_bridge *br)
1090 struct net_bridge_vlan_group *vg;
1093 vg = kzalloc(sizeof(*vg), GFP_KERNEL);
1096 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1099 ret = vlan_tunnel_init(vg);
1101 goto err_tunnel_init;
1102 INIT_LIST_HEAD(&vg->vlan_list);
1103 br->vlan_proto = htons(ETH_P_8021Q);
1104 br->default_pvid = 1;
1105 rcu_assign_pointer(br->vlgrp, vg);
1111 rhashtable_destroy(&vg->vlan_hash);
1118 int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack)
1120 struct switchdev_attr attr = {
1121 .orig_dev = p->br->dev,
1122 .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
1123 .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP,
1124 .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED),
1126 struct net_bridge_vlan_group *vg;
1129 vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL);
1133 ret = switchdev_port_attr_set(p->dev, &attr);
1134 if (ret && ret != -EOPNOTSUPP)
1135 goto err_vlan_enabled;
1137 ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params);
1140 ret = vlan_tunnel_init(vg);
1142 goto err_tunnel_init;
1143 INIT_LIST_HEAD(&vg->vlan_list);
1144 rcu_assign_pointer(p->vlgrp, vg);
1145 if (p->br->default_pvid) {
1148 ret = nbp_vlan_add(p, p->br->default_pvid,
1149 BRIDGE_VLAN_INFO_PVID |
1150 BRIDGE_VLAN_INFO_UNTAGGED,
1154 br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN);
1160 RCU_INIT_POINTER(p->vlgrp, NULL);
1162 vlan_tunnel_deinit(vg);
1164 rhashtable_destroy(&vg->vlan_hash);
1172 /* Must be protected by RTNL.
1173 * Must be called with vid in range from 1 to 4094 inclusive.
1174 * changed must be true only if the vlan was created or updated
1176 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1177 bool *changed, struct netlink_ext_ack *extack)
1179 struct net_bridge_vlan *vlan;
1185 vlan = br_vlan_find(nbp_vlan_group(port), vid);
1187 /* Pass the flags to the hardware bridge */
1188 ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
1189 if (ret && ret != -EOPNOTSUPP)
1191 *changed = __vlan_add_flags(vlan, flags);
1196 vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
1202 ret = __vlan_add(vlan, flags, extack);
1211 /* Must be protected by RTNL.
1212 * Must be called with vid in range from 1 to 4094 inclusive.
1214 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1216 struct net_bridge_vlan *v;
1220 v = br_vlan_find(nbp_vlan_group(port), vid);
1223 br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
1224 br_fdb_delete_by_port(port->br, port, vid, 0);
1226 return __vlan_del(v);
1229 void nbp_vlan_flush(struct net_bridge_port *port)
1231 struct net_bridge_vlan_group *vg;
1235 vg = nbp_vlan_group(port);
1236 __vlan_flush(port->br, port, vg);
1237 RCU_INIT_POINTER(port->vlgrp, NULL);
1239 __vlan_group_free(vg);
1242 void br_vlan_get_stats(const struct net_bridge_vlan *v,
1243 struct br_vlan_stats *stats)
1247 memset(stats, 0, sizeof(*stats));
1248 for_each_possible_cpu(i) {
1249 u64 rxpackets, rxbytes, txpackets, txbytes;
1250 struct br_vlan_stats *cpu_stats;
1253 cpu_stats = per_cpu_ptr(v->stats, i);
1255 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1256 rxpackets = cpu_stats->rx_packets;
1257 rxbytes = cpu_stats->rx_bytes;
1258 txbytes = cpu_stats->tx_bytes;
1259 txpackets = cpu_stats->tx_packets;
1260 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1262 stats->rx_packets += rxpackets;
1263 stats->rx_bytes += rxbytes;
1264 stats->tx_bytes += txbytes;
1265 stats->tx_packets += txpackets;
1269 static int __br_vlan_get_pvid(const struct net_device *dev,
1270 struct net_bridge_port *p, u16 *p_pvid)
1272 struct net_bridge_vlan_group *vg;
1275 vg = nbp_vlan_group(p);
1276 else if (netif_is_bridge_master(dev))
1277 vg = br_vlan_group(netdev_priv(dev));
1281 *p_pvid = br_get_pvid(vg);
1285 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
1289 return __br_vlan_get_pvid(dev, br_port_get_check_rtnl(dev), p_pvid);
1291 EXPORT_SYMBOL_GPL(br_vlan_get_pvid);
1293 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid)
1295 return __br_vlan_get_pvid(dev, br_port_get_check_rcu(dev), p_pvid);
1297 EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu);
1299 int br_vlan_get_info(const struct net_device *dev, u16 vid,
1300 struct bridge_vlan_info *p_vinfo)
1302 struct net_bridge_vlan_group *vg;
1303 struct net_bridge_vlan *v;
1304 struct net_bridge_port *p;
1307 p = br_port_get_check_rtnl(dev);
1309 vg = nbp_vlan_group(p);
1310 else if (netif_is_bridge_master(dev))
1311 vg = br_vlan_group(netdev_priv(dev));
1315 v = br_vlan_find(vg, vid);
1320 p_vinfo->flags = v->flags;
1321 if (vid == br_get_pvid(vg))
1322 p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID;
1325 EXPORT_SYMBOL_GPL(br_vlan_get_info);
1327 static int br_vlan_is_bind_vlan_dev(const struct net_device *dev)
1329 return is_vlan_dev(dev) &&
1330 !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING);
1333 static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev,
1334 __always_unused void *data)
1336 return br_vlan_is_bind_vlan_dev(dev);
1339 static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev)
1344 found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn,
1351 struct br_vlan_bind_walk_data {
1353 struct net_device *result;
1356 static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev,
1359 struct br_vlan_bind_walk_data *data = data_in;
1362 if (br_vlan_is_bind_vlan_dev(dev) &&
1363 vlan_dev_priv(dev)->vlan_id == data->vid) {
1371 static struct net_device *
1372 br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid)
1374 struct br_vlan_bind_walk_data data = {
1379 netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn,
1386 static bool br_vlan_is_dev_up(const struct net_device *dev)
1388 return !!(dev->flags & IFF_UP) && netif_oper_up(dev);
1391 static void br_vlan_set_vlan_dev_state(const struct net_bridge *br,
1392 struct net_device *vlan_dev)
1394 u16 vid = vlan_dev_priv(vlan_dev)->vlan_id;
1395 struct net_bridge_vlan_group *vg;
1396 struct net_bridge_port *p;
1397 bool has_carrier = false;
1399 if (!netif_carrier_ok(br->dev)) {
1400 netif_carrier_off(vlan_dev);
1404 list_for_each_entry(p, &br->port_list, list) {
1405 vg = nbp_vlan_group(p);
1406 if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) {
1413 netif_carrier_on(vlan_dev);
1415 netif_carrier_off(vlan_dev);
1418 static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p)
1420 struct net_bridge_vlan_group *vg = nbp_vlan_group(p);
1421 struct net_bridge_vlan *vlan;
1422 struct net_device *vlan_dev;
1424 list_for_each_entry(vlan, &vg->vlan_list, vlist) {
1425 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev,
1428 if (br_vlan_is_dev_up(p->dev)) {
1429 if (netif_carrier_ok(p->br->dev))
1430 netif_carrier_on(vlan_dev);
1432 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1438 static void br_vlan_upper_change(struct net_device *dev,
1439 struct net_device *upper_dev,
1442 struct net_bridge *br = netdev_priv(dev);
1444 if (!br_vlan_is_bind_vlan_dev(upper_dev))
1448 br_vlan_set_vlan_dev_state(br, upper_dev);
1449 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true);
1451 br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING,
1452 br_vlan_has_upper_bind_vlan_dev(dev));
1456 struct br_vlan_link_state_walk_data {
1457 struct net_bridge *br;
1460 static int br_vlan_link_state_change_fn(struct net_device *vlan_dev,
1463 struct br_vlan_link_state_walk_data *data = data_in;
1465 if (br_vlan_is_bind_vlan_dev(vlan_dev))
1466 br_vlan_set_vlan_dev_state(data->br, vlan_dev);
1471 static void br_vlan_link_state_change(struct net_device *dev,
1472 struct net_bridge *br)
1474 struct br_vlan_link_state_walk_data data = {
1479 netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn,
1484 /* Must be protected by RTNL. */
1485 static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid)
1487 struct net_device *vlan_dev;
1489 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1492 vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid);
1494 br_vlan_set_vlan_dev_state(p->br, vlan_dev);
1497 /* Must be protected by RTNL. */
1498 int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr)
1500 struct netdev_notifier_changeupper_info *info;
1501 struct net_bridge *br = netdev_priv(dev);
1502 int vlcmd = 0, ret = 0;
1503 bool changed = false;
1506 case NETDEV_REGISTER:
1507 ret = br_vlan_add(br, br->default_pvid,
1508 BRIDGE_VLAN_INFO_PVID |
1509 BRIDGE_VLAN_INFO_UNTAGGED |
1510 BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL);
1511 vlcmd = RTM_NEWVLAN;
1513 case NETDEV_UNREGISTER:
1514 changed = !br_vlan_delete(br, br->default_pvid);
1515 vlcmd = RTM_DELVLAN;
1517 case NETDEV_CHANGEUPPER:
1519 br_vlan_upper_change(dev, info->upper_dev, info->linking);
1524 if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING))
1526 br_vlan_link_state_change(dev, br);
1530 br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd);
1535 /* Must be protected by RTNL. */
1536 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event)
1538 if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING))
1545 br_vlan_set_all_vlan_dev_state(p);
1550 static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range,
1553 struct bridge_vlan_info info;
1554 struct nlattr *nest;
1556 nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY);
1560 memset(&info, 0, sizeof(info));
1562 if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
1563 info.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
1564 if (flags & BRIDGE_VLAN_INFO_PVID)
1565 info.flags |= BRIDGE_VLAN_INFO_PVID;
1567 if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info))
1570 if (vid_range && vid < vid_range &&
1571 !(flags & BRIDGE_VLAN_INFO_PVID) &&
1572 nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range))
1575 nla_nest_end(skb, nest);
1580 nla_nest_cancel(skb, nest);
1584 static size_t rtnl_vlan_nlmsg_size(void)
1586 return NLMSG_ALIGN(sizeof(struct br_vlan_msg))
1587 + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */
1588 + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */
1589 + nla_total_size(sizeof(struct bridge_vlan_info)); /* BRIDGE_VLANDB_ENTRY_INFO */
1592 void br_vlan_notify(const struct net_bridge *br,
1593 const struct net_bridge_port *p,
1594 u16 vid, u16 vid_range,
1597 struct net_bridge_vlan_group *vg;
1598 struct net_bridge_vlan *v;
1599 struct br_vlan_msg *bvm;
1600 struct nlmsghdr *nlh;
1601 struct sk_buff *skb;
1607 /* right now notifications are done only with rtnl held */
1611 ifindex = p->dev->ifindex;
1612 vg = nbp_vlan_group(p);
1613 net = dev_net(p->dev);
1615 ifindex = br->dev->ifindex;
1616 vg = br_vlan_group(br);
1617 net = dev_net(br->dev);
1620 skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL);
1625 nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0);
1628 bvm = nlmsg_data(nlh);
1629 memset(bvm, 0, sizeof(*bvm));
1630 bvm->family = AF_BRIDGE;
1631 bvm->ifindex = ifindex;
1635 /* need to find the vlan due to flags/options */
1636 v = br_vlan_find(vg, vid);
1637 if (!v || !br_vlan_should_use(v))
1641 if (br_get_pvid(vg) == v->vid)
1642 flags |= BRIDGE_VLAN_INFO_PVID;
1650 if (!br_vlan_fill_vids(skb, vid, vid_range, flags))
1653 nlmsg_end(skb, nlh);
1654 rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL);
1658 rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err);
1663 /* check if v_curr can enter a range ending in range_end */
1664 static bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1665 const struct net_bridge_vlan *range_end)
1667 return v_curr->vid - range_end->vid == 1 &&
1668 range_end->flags == v_curr->flags;
1671 static int br_vlan_dump_dev(const struct net_device *dev,
1672 struct sk_buff *skb,
1673 struct netlink_callback *cb)
1675 struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL;
1676 struct net_bridge_vlan_group *vg;
1677 int idx = 0, s_idx = cb->args[1];
1678 struct nlmsghdr *nlh = NULL;
1679 struct net_bridge_port *p;
1680 struct br_vlan_msg *bvm;
1681 struct net_bridge *br;
1685 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev))
1688 if (netif_is_bridge_master(dev)) {
1689 br = netdev_priv(dev);
1690 vg = br_vlan_group_rcu(br);
1693 p = br_port_get_rcu(dev);
1696 vg = nbp_vlan_group_rcu(p);
1703 nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
1704 RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI);
1707 bvm = nlmsg_data(nlh);
1708 memset(bvm, 0, sizeof(*bvm));
1709 bvm->family = PF_BRIDGE;
1710 bvm->ifindex = dev->ifindex;
1711 pvid = br_get_pvid(vg);
1713 /* idx must stay at range's beginning until it is filled in */
1714 list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
1715 if (!br_vlan_should_use(v))
1728 if (v->vid == pvid || !br_vlan_can_enter_range(v, range_end)) {
1729 u16 flags = br_vlan_flags(range_start, pvid);
1731 if (!br_vlan_fill_vids(skb, range_start->vid,
1732 range_end->vid, flags)) {
1736 /* advance number of filled vlans */
1737 idx += range_end->vid - range_start->vid + 1;
1744 /* err will be 0 and range_start will be set in 3 cases here:
1745 * - first vlan (range_start == range_end)
1746 * - last vlan (range_start == range_end, not in range)
1747 * - last vlan range (range_start != range_end, in range)
1749 if (!err && range_start &&
1750 !br_vlan_fill_vids(skb, range_start->vid, range_end->vid,
1751 br_vlan_flags(range_start, pvid)))
1754 cb->args[1] = err ? idx : 0;
1756 nlmsg_end(skb, nlh);
1761 static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb)
1763 int idx = 0, err = 0, s_idx = cb->args[0];
1764 struct net *net = sock_net(skb->sk);
1765 struct br_vlan_msg *bvm;
1766 struct net_device *dev;
1768 err = nlmsg_parse(cb->nlh, sizeof(*bvm), NULL, 0, NULL, cb->extack);
1772 bvm = nlmsg_data(cb->nlh);
1776 dev = dev_get_by_index_rcu(net, bvm->ifindex);
1781 err = br_vlan_dump_dev(dev, skb, cb);
1782 if (err && err != -EMSGSIZE)
1785 for_each_netdev_rcu(net, dev) {
1789 err = br_vlan_dump_dev(dev, skb, cb);
1790 if (err == -EMSGSIZE)
1807 static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = {
1808 [BRIDGE_VLANDB_ENTRY_INFO] = { .type = NLA_EXACT_LEN,
1809 .len = sizeof(struct bridge_vlan_info) },
1810 [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 },
1813 static int br_vlan_rtm_process_one(struct net_device *dev,
1814 const struct nlattr *attr,
1815 int cmd, struct netlink_ext_ack *extack)
1817 struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL;
1818 struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1];
1819 struct net_bridge_vlan_group *vg;
1820 struct net_bridge_port *p = NULL;
1821 int err = 0, cmdmap = 0;
1822 struct net_bridge *br;
1823 bool changed = false;
1825 if (netif_is_bridge_master(dev)) {
1826 br = netdev_priv(dev);
1827 vg = br_vlan_group(br);
1829 p = br_port_get_rtnl(dev);
1833 vg = nbp_vlan_group(p);
1839 err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr,
1840 br_vlan_db_policy, extack);
1844 if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) {
1845 NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info");
1848 memset(&vrange_end, 0, sizeof(vrange_end));
1850 vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]);
1851 if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
1852 BRIDGE_VLAN_INFO_RANGE_END)) {
1853 NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls");
1856 if (!br_vlan_valid_id(vinfo->vid, extack))
1859 if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) {
1860 vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]);
1861 /* validate user-provided flags without RANGE_BEGIN */
1862 vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags;
1863 vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
1865 /* vinfo_last is the range start, vinfo the range end */
1867 vinfo = &vrange_end;
1869 if (!br_vlan_valid_id(vinfo->vid, extack) ||
1870 !br_vlan_valid_range(vinfo, vinfo_last, extack))
1876 cmdmap = RTM_SETLINK;
1879 cmdmap = RTM_DELLINK;
1883 err = br_process_vlan_info(br, p, cmdmap, vinfo, &vinfo_last, &changed,
1886 br_ifinfo_notify(cmdmap, br, p);
1891 static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh,
1892 struct netlink_ext_ack *extack)
1894 struct net *net = sock_net(skb->sk);
1895 struct br_vlan_msg *bvm;
1896 struct net_device *dev;
1897 struct nlattr *attr;
1901 /* this should validate the header and check for remaining bytes */
1902 err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL,
1907 bvm = nlmsg_data(nlh);
1908 dev = __dev_get_by_index(net, bvm->ifindex);
1912 if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) {
1913 NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port");
1917 nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) {
1918 if (nla_type(attr) != BRIDGE_VLANDB_ENTRY)
1922 err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type,
1928 NL_SET_ERR_MSG_MOD(extack, "No vlans found to process");
1935 void br_vlan_rtnl_init(void)
1937 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL,
1938 br_vlan_rtm_dump, 0);
1939 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN,
1940 br_vlan_rtm_process, NULL, 0);
1941 rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN,
1942 br_vlan_rtm_process, NULL, 0);
1945 void br_vlan_rtnl_uninit(void)
1947 rtnl_unregister(PF_BRIDGE, RTM_GETVLAN);
1948 rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN);
1949 rtnl_unregister(PF_BRIDGE, RTM_DELVLAN);