3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/rculist.h>
17 #include <linux/spinlock.h>
18 #include <linux/times.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/jhash.h>
22 #include <linux/random.h>
23 #include <linux/slab.h>
24 #include <linux/atomic.h>
25 #include <asm/unaligned.h>
26 #include <linux/if_vlan.h>
27 #include <net/switchdev.h>
28 #include "br_private.h"
30 static struct kmem_cache *br_fdb_cache __read_mostly;
31 static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
32 const unsigned char *addr,
34 static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
35 const unsigned char *addr, u16 vid);
36 static void fdb_notify(struct net_bridge *br,
37 const struct net_bridge_fdb_entry *, int);
39 static u32 fdb_salt __read_mostly;
41 int __init br_fdb_init(void)
43 br_fdb_cache = kmem_cache_create("bridge_fdb_cache",
44 sizeof(struct net_bridge_fdb_entry),
46 SLAB_HWCACHE_ALIGN, NULL);
50 get_random_bytes(&fdb_salt, sizeof(fdb_salt));
54 void br_fdb_fini(void)
56 kmem_cache_destroy(br_fdb_cache);
60 /* if topology_changing then use forward_delay (default 15 sec)
61 * otherwise keep longer (default 5 minutes)
63 static inline unsigned long hold_time(const struct net_bridge *br)
65 return br->topology_change ? br->forward_delay : br->ageing_time;
68 static inline int has_expired(const struct net_bridge *br,
69 const struct net_bridge_fdb_entry *fdb)
71 return !fdb->is_static &&
72 time_before_eq(fdb->updated + hold_time(br), jiffies);
75 static inline int br_mac_hash(const unsigned char *mac, __u16 vid)
77 /* use 1 byte of OUI and 3 bytes of NIC */
78 u32 key = get_unaligned((u32 *)(mac + 2));
79 return jhash_2words(key, vid, fdb_salt) & (BR_HASH_SIZE - 1);
82 static void fdb_rcu_free(struct rcu_head *head)
84 struct net_bridge_fdb_entry *ent
85 = container_of(head, struct net_bridge_fdb_entry, rcu);
86 kmem_cache_free(br_fdb_cache, ent);
89 /* When a static FDB entry is added, the mac address from the entry is
90 * added to the bridge private HW address list and all required ports
91 * are then updated with the new information.
94 static void fdb_add_hw_addr(struct net_bridge *br, const unsigned char *addr)
97 struct net_bridge_port *p;
101 list_for_each_entry(p, &br->port_list, list) {
102 if (!br_promisc_port(p)) {
103 err = dev_uc_add(p->dev, addr);
111 list_for_each_entry_continue_reverse(p, &br->port_list, list) {
112 if (!br_promisc_port(p))
113 dev_uc_del(p->dev, addr);
117 /* When a static FDB entry is deleted, the HW address from that entry is
118 * also removed from the bridge private HW address list and updates all
119 * the ports with needed information.
122 static void fdb_del_hw_addr(struct net_bridge *br, const unsigned char *addr)
124 struct net_bridge_port *p;
128 list_for_each_entry(p, &br->port_list, list) {
129 if (!br_promisc_port(p))
130 dev_uc_del(p->dev, addr);
134 static void fdb_del_external_learn(struct net_bridge_fdb_entry *f)
136 struct switchdev_obj obj = {
137 .id = SWITCHDEV_OBJ_PORT_FDB,
139 .addr = f->addr.addr,
144 switchdev_port_obj_del(f->dst->dev, &obj);
147 static void fdb_delete(struct net_bridge *br, struct net_bridge_fdb_entry *f)
150 fdb_del_hw_addr(br, f->addr.addr);
152 if (f->added_by_external_learn)
153 fdb_del_external_learn(f);
155 hlist_del_rcu(&f->hlist);
156 fdb_notify(br, f, RTM_DELNEIGH);
157 call_rcu(&f->rcu, fdb_rcu_free);
160 /* Delete a local entry if no other port had the same address. */
161 static void fdb_delete_local(struct net_bridge *br,
162 const struct net_bridge_port *p,
163 struct net_bridge_fdb_entry *f)
165 const unsigned char *addr = f->addr.addr;
166 u16 vid = f->vlan_id;
167 struct net_bridge_port *op;
169 /* Maybe another port has same hw addr? */
170 list_for_each_entry(op, &br->port_list, list) {
171 if (op != p && ether_addr_equal(op->dev->dev_addr, addr) &&
172 (!vid || nbp_vlan_find(op, vid))) {
174 f->added_by_user = 0;
179 /* Maybe bridge device has same hw addr? */
180 if (p && ether_addr_equal(br->dev->dev_addr, addr) &&
181 (!vid || br_vlan_find(br, vid))) {
183 f->added_by_user = 0;
190 void br_fdb_find_delete_local(struct net_bridge *br,
191 const struct net_bridge_port *p,
192 const unsigned char *addr, u16 vid)
194 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
195 struct net_bridge_fdb_entry *f;
197 spin_lock_bh(&br->hash_lock);
198 f = fdb_find(head, addr, vid);
199 if (f && f->is_local && !f->added_by_user && f->dst == p)
200 fdb_delete_local(br, p, f);
201 spin_unlock_bh(&br->hash_lock);
204 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
206 struct net_bridge *br = p->br;
207 struct net_port_vlans *pv = nbp_get_vlan_info(p);
212 spin_lock_bh(&br->hash_lock);
214 /* Search all chains since old address/hash is unknown */
215 for (i = 0; i < BR_HASH_SIZE; i++) {
216 struct hlist_node *h;
217 hlist_for_each(h, &br->hash[i]) {
218 struct net_bridge_fdb_entry *f;
220 f = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
221 if (f->dst == p && f->is_local && !f->added_by_user) {
223 fdb_delete_local(br, p, f);
225 /* if this port has no vlan information
226 * configured, we can safely be done at
236 /* insert new address, may fail if invalid address or dup. */
237 fdb_insert(br, p, newaddr, 0);
242 /* Now add entries for every VLAN configured on the port.
243 * This function runs under RTNL so the bitmap will not change
246 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
247 fdb_insert(br, p, newaddr, vid);
250 spin_unlock_bh(&br->hash_lock);
253 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr)
255 struct net_bridge_fdb_entry *f;
256 struct net_port_vlans *pv;
259 spin_lock_bh(&br->hash_lock);
261 /* If old entry was unassociated with any port, then delete it. */
262 f = __br_fdb_get(br, br->dev->dev_addr, 0);
263 if (f && f->is_local && !f->dst)
264 fdb_delete_local(br, NULL, f);
266 fdb_insert(br, NULL, newaddr, 0);
268 /* Now remove and add entries for every VLAN configured on the
269 * bridge. This function runs under RTNL so the bitmap will not
270 * change from under us.
272 pv = br_get_vlan_info(br);
276 for_each_set_bit_from(vid, pv->vlan_bitmap, VLAN_N_VID) {
277 f = __br_fdb_get(br, br->dev->dev_addr, vid);
278 if (f && f->is_local && !f->dst)
279 fdb_delete_local(br, NULL, f);
280 fdb_insert(br, NULL, newaddr, vid);
283 spin_unlock_bh(&br->hash_lock);
286 void br_fdb_cleanup(unsigned long _data)
288 struct net_bridge *br = (struct net_bridge *)_data;
289 unsigned long delay = hold_time(br);
290 unsigned long next_timer = jiffies + br->ageing_time;
293 spin_lock(&br->hash_lock);
294 for (i = 0; i < BR_HASH_SIZE; i++) {
295 struct net_bridge_fdb_entry *f;
296 struct hlist_node *n;
298 hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
299 unsigned long this_timer;
302 this_timer = f->updated + delay;
303 if (time_before_eq(this_timer, jiffies))
305 else if (time_before(this_timer, next_timer))
306 next_timer = this_timer;
309 spin_unlock(&br->hash_lock);
311 mod_timer(&br->gc_timer, round_jiffies_up(next_timer));
314 /* Completely flush all dynamic entries in forwarding database.*/
315 void br_fdb_flush(struct net_bridge *br)
319 spin_lock_bh(&br->hash_lock);
320 for (i = 0; i < BR_HASH_SIZE; i++) {
321 struct net_bridge_fdb_entry *f;
322 struct hlist_node *n;
323 hlist_for_each_entry_safe(f, n, &br->hash[i], hlist) {
328 spin_unlock_bh(&br->hash_lock);
331 /* Flush all entries referring to a specific port.
332 * if do_all is set also flush static entries
333 * if vid is set delete all entries that match the vlan_id
335 void br_fdb_delete_by_port(struct net_bridge *br,
336 const struct net_bridge_port *p,
342 spin_lock_bh(&br->hash_lock);
343 for (i = 0; i < BR_HASH_SIZE; i++) {
344 struct hlist_node *h, *g;
346 hlist_for_each_safe(h, g, &br->hash[i]) {
347 struct net_bridge_fdb_entry *f
348 = hlist_entry(h, struct net_bridge_fdb_entry, hlist);
353 if (f->is_static || (vid && f->vlan_id != vid))
357 fdb_delete_local(br, p, f);
362 spin_unlock_bh(&br->hash_lock);
365 /* No locking or refcounting, assumes caller has rcu_read_lock */
366 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
367 const unsigned char *addr,
370 struct net_bridge_fdb_entry *fdb;
372 hlist_for_each_entry_rcu(fdb,
373 &br->hash[br_mac_hash(addr, vid)], hlist) {
374 if (ether_addr_equal(fdb->addr.addr, addr) &&
375 fdb->vlan_id == vid) {
376 if (unlikely(has_expired(br, fdb)))
385 #if IS_ENABLED(CONFIG_ATM_LANE)
386 /* Interface used by ATM LANE hook to test
387 * if an addr is on some other bridge port */
388 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr)
390 struct net_bridge_fdb_entry *fdb;
391 struct net_bridge_port *port;
395 port = br_port_get_rcu(dev);
399 fdb = __br_fdb_get(port->br, addr, 0);
400 ret = fdb && fdb->dst && fdb->dst->dev != dev &&
401 fdb->dst->state == BR_STATE_FORWARDING;
407 #endif /* CONFIG_ATM_LANE */
410 * Fill buffer with forwarding table records in
413 int br_fdb_fillbuf(struct net_bridge *br, void *buf,
414 unsigned long maxnum, unsigned long skip)
416 struct __fdb_entry *fe = buf;
418 struct net_bridge_fdb_entry *f;
420 memset(buf, 0, maxnum*sizeof(struct __fdb_entry));
423 for (i = 0; i < BR_HASH_SIZE; i++) {
424 hlist_for_each_entry_rcu(f, &br->hash[i], hlist) {
428 if (has_expired(br, f))
431 /* ignore pseudo entry for local MAC address */
440 /* convert from internal format to API */
441 memcpy(fe->mac_addr, f->addr.addr, ETH_ALEN);
443 /* due to ABI compat need to split into hi/lo */
444 fe->port_no = f->dst->port_no;
445 fe->port_hi = f->dst->port_no >> 8;
447 fe->is_local = f->is_local;
449 fe->ageing_timer_value = jiffies_delta_to_clock_t(jiffies - f->updated);
461 static struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
462 const unsigned char *addr,
465 struct net_bridge_fdb_entry *fdb;
467 hlist_for_each_entry(fdb, head, hlist) {
468 if (ether_addr_equal(fdb->addr.addr, addr) &&
475 static struct net_bridge_fdb_entry *fdb_find_rcu(struct hlist_head *head,
476 const unsigned char *addr,
479 struct net_bridge_fdb_entry *fdb;
481 hlist_for_each_entry_rcu(fdb, head, hlist) {
482 if (ether_addr_equal(fdb->addr.addr, addr) &&
489 static struct net_bridge_fdb_entry *fdb_create(struct hlist_head *head,
490 struct net_bridge_port *source,
491 const unsigned char *addr,
494 struct net_bridge_fdb_entry *fdb;
496 fdb = kmem_cache_alloc(br_fdb_cache, GFP_ATOMIC);
498 memcpy(fdb->addr.addr, addr, ETH_ALEN);
503 fdb->added_by_user = 0;
504 fdb->added_by_external_learn = 0;
505 fdb->updated = fdb->used = jiffies;
506 hlist_add_head_rcu(&fdb->hlist, head);
511 static int fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
512 const unsigned char *addr, u16 vid)
514 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
515 struct net_bridge_fdb_entry *fdb;
517 if (!is_valid_ether_addr(addr))
520 fdb = fdb_find(head, addr, vid);
522 /* it is okay to have multiple ports with same
523 * address, just use the first one.
527 br_warn(br, "adding interface %s with same address "
528 "as a received packet\n",
529 source ? source->dev->name : br->dev->name);
533 fdb = fdb_create(head, source, addr, vid);
537 fdb->is_local = fdb->is_static = 1;
538 fdb_add_hw_addr(br, addr);
539 fdb_notify(br, fdb, RTM_NEWNEIGH);
543 /* Add entry for local address of interface */
544 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
545 const unsigned char *addr, u16 vid)
549 spin_lock_bh(&br->hash_lock);
550 ret = fdb_insert(br, source, addr, vid);
551 spin_unlock_bh(&br->hash_lock);
555 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
556 const unsigned char *addr, u16 vid, bool added_by_user)
558 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
559 struct net_bridge_fdb_entry *fdb;
560 bool fdb_modified = false;
562 /* some users want to always flood. */
563 if (hold_time(br) == 0)
566 /* ignore packets unless we are using this port */
567 if (!(source->state == BR_STATE_LEARNING ||
568 source->state == BR_STATE_FORWARDING))
571 fdb = fdb_find_rcu(head, addr, vid);
573 /* attempt to update an entry for a local interface */
574 if (unlikely(fdb->is_local)) {
576 br_warn(br, "received packet on %s with "
577 "own address as source address\n",
580 /* fastpath: update of existing entry */
581 if (unlikely(source != fdb->dst)) {
585 fdb->updated = jiffies;
586 if (unlikely(added_by_user))
587 fdb->added_by_user = 1;
588 if (unlikely(fdb_modified))
589 fdb_notify(br, fdb, RTM_NEWNEIGH);
592 spin_lock(&br->hash_lock);
593 if (likely(!fdb_find(head, addr, vid))) {
594 fdb = fdb_create(head, source, addr, vid);
596 if (unlikely(added_by_user))
597 fdb->added_by_user = 1;
598 fdb_notify(br, fdb, RTM_NEWNEIGH);
601 /* else we lose race and someone else inserts
602 * it first, don't bother updating
604 spin_unlock(&br->hash_lock);
608 static int fdb_to_nud(const struct net_bridge_fdb_entry *fdb)
611 return NUD_PERMANENT;
612 else if (fdb->is_static)
614 else if (has_expired(fdb->dst->br, fdb))
617 return NUD_REACHABLE;
620 static int fdb_fill_info(struct sk_buff *skb, const struct net_bridge *br,
621 const struct net_bridge_fdb_entry *fdb,
622 u32 portid, u32 seq, int type, unsigned int flags)
624 unsigned long now = jiffies;
625 struct nda_cacheinfo ci;
626 struct nlmsghdr *nlh;
629 nlh = nlmsg_put(skb, portid, seq, type, sizeof(*ndm), flags);
633 ndm = nlmsg_data(nlh);
634 ndm->ndm_family = AF_BRIDGE;
637 ndm->ndm_flags = fdb->added_by_external_learn ? NTF_EXT_LEARNED : 0;
639 ndm->ndm_ifindex = fdb->dst ? fdb->dst->dev->ifindex : br->dev->ifindex;
640 ndm->ndm_state = fdb_to_nud(fdb);
642 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->addr))
643 goto nla_put_failure;
644 if (nla_put_u32(skb, NDA_MASTER, br->dev->ifindex))
645 goto nla_put_failure;
646 ci.ndm_used = jiffies_to_clock_t(now - fdb->used);
647 ci.ndm_confirmed = 0;
648 ci.ndm_updated = jiffies_to_clock_t(now - fdb->updated);
650 if (nla_put(skb, NDA_CACHEINFO, sizeof(ci), &ci))
651 goto nla_put_failure;
653 if (fdb->vlan_id && nla_put(skb, NDA_VLAN, sizeof(u16), &fdb->vlan_id))
654 goto nla_put_failure;
660 nlmsg_cancel(skb, nlh);
664 static inline size_t fdb_nlmsg_size(void)
666 return NLMSG_ALIGN(sizeof(struct ndmsg))
667 + nla_total_size(ETH_ALEN) /* NDA_LLADDR */
668 + nla_total_size(sizeof(u32)) /* NDA_MASTER */
669 + nla_total_size(sizeof(u16)) /* NDA_VLAN */
670 + nla_total_size(sizeof(struct nda_cacheinfo));
673 static void fdb_notify(struct net_bridge *br,
674 const struct net_bridge_fdb_entry *fdb, int type)
676 struct net *net = dev_net(br->dev);
680 skb = nlmsg_new(fdb_nlmsg_size(), GFP_ATOMIC);
684 err = fdb_fill_info(skb, br, fdb, 0, 0, type, 0);
686 /* -EMSGSIZE implies BUG in fdb_nlmsg_size() */
687 WARN_ON(err == -EMSGSIZE);
691 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
694 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
697 /* Dump information about entries, in response to GETNEIGH */
698 int br_fdb_dump(struct sk_buff *skb,
699 struct netlink_callback *cb,
700 struct net_device *dev,
701 struct net_device *filter_dev,
704 struct net_bridge *br = netdev_priv(dev);
707 if (!(dev->priv_flags & IFF_EBRIDGE))
711 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx);
713 for (i = 0; i < BR_HASH_SIZE; i++) {
714 struct net_bridge_fdb_entry *f;
716 hlist_for_each_entry_rcu(f, &br->hash[i], hlist) {
717 if (idx < cb->args[0])
721 (!f->dst || f->dst->dev != filter_dev)) {
722 if (filter_dev != dev)
724 /* !f->dst is a special case for bridge
725 * It means the MAC belongs to the bridge
726 * Therefore need a little more filtering
727 * we only want to dump the !f->dst case
732 if (!filter_dev && f->dst)
735 if (fdb_fill_info(skb, br, f,
736 NETLINK_CB(cb->skb).portid,
750 /* Update (create or replace) forwarding database entry */
751 static int fdb_add_entry(struct net_bridge_port *source, const __u8 *addr,
752 __u16 state, __u16 flags, __u16 vid)
754 struct net_bridge *br = source->br;
755 struct hlist_head *head = &br->hash[br_mac_hash(addr, vid)];
756 struct net_bridge_fdb_entry *fdb;
757 bool modified = false;
759 /* If the port cannot learn allow only local and static entries */
760 if (!(state & NUD_PERMANENT) && !(state & NUD_NOARP) &&
761 !(source->state == BR_STATE_LEARNING ||
762 source->state == BR_STATE_FORWARDING))
765 fdb = fdb_find(head, addr, vid);
767 if (!(flags & NLM_F_CREATE))
770 fdb = fdb_create(head, source, addr, vid);
776 if (flags & NLM_F_EXCL)
779 if (fdb->dst != source) {
785 if (fdb_to_nud(fdb) != state) {
786 if (state & NUD_PERMANENT) {
788 if (!fdb->is_static) {
790 fdb_add_hw_addr(br, addr);
792 } else if (state & NUD_NOARP) {
794 if (!fdb->is_static) {
796 fdb_add_hw_addr(br, addr);
800 if (fdb->is_static) {
802 fdb_del_hw_addr(br, addr);
808 fdb->added_by_user = 1;
812 fdb->updated = jiffies;
813 fdb_notify(br, fdb, RTM_NEWNEIGH);
819 static int __br_fdb_add(struct ndmsg *ndm, struct net_bridge_port *p,
820 const unsigned char *addr, u16 nlh_flags, u16 vid)
824 if (ndm->ndm_flags & NTF_USE) {
827 br_fdb_update(p->br, p, addr, vid, true);
831 spin_lock_bh(&p->br->hash_lock);
832 err = fdb_add_entry(p, addr, ndm->ndm_state,
834 spin_unlock_bh(&p->br->hash_lock);
840 /* Add new permanent fdb entry with RTM_NEWNEIGH */
841 int br_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
842 struct net_device *dev,
843 const unsigned char *addr, u16 vid, u16 nlh_flags)
845 struct net_bridge_port *p;
847 struct net_port_vlans *pv;
849 if (!(ndm->ndm_state & (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE))) {
850 pr_info("bridge: RTM_NEWNEIGH with invalid state %#x\n", ndm->ndm_state);
854 if (is_zero_ether_addr(addr)) {
855 pr_info("bridge: RTM_NEWNEIGH with invalid ether address\n");
859 p = br_port_get_rtnl(dev);
861 pr_info("bridge: RTM_NEWNEIGH %s not a bridge port\n",
866 pv = nbp_get_vlan_info(p);
868 if (!pv || !test_bit(vid, pv->vlan_bitmap)) {
869 pr_info("bridge: RTM_NEWNEIGH with unconfigured "
870 "vlan %d on port %s\n", vid, dev->name);
874 /* VID was specified, so use it. */
875 err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
877 err = __br_fdb_add(ndm, p, addr, nlh_flags, 0);
881 /* We have vlans configured on this port and user didn't
882 * specify a VLAN. To be nice, add/update entry for every
885 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
886 err = __br_fdb_add(ndm, p, addr, nlh_flags, vid);
896 static int fdb_delete_by_addr_and_port(struct net_bridge_port *p,
897 const u8 *addr, u16 vlan)
899 struct net_bridge *br = p->br;
900 struct hlist_head *head = &br->hash[br_mac_hash(addr, vlan)];
901 struct net_bridge_fdb_entry *fdb;
903 fdb = fdb_find(head, addr, vlan);
904 if (!fdb || fdb->dst != p)
911 static int __br_fdb_delete(struct net_bridge_port *p,
912 const unsigned char *addr, u16 vid)
916 spin_lock_bh(&p->br->hash_lock);
917 err = fdb_delete_by_addr_and_port(p, addr, vid);
918 spin_unlock_bh(&p->br->hash_lock);
923 /* Remove neighbor entry with RTM_DELNEIGH */
924 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
925 struct net_device *dev,
926 const unsigned char *addr, u16 vid)
928 struct net_bridge_port *p;
930 struct net_port_vlans *pv;
932 p = br_port_get_rtnl(dev);
934 pr_info("bridge: RTM_DELNEIGH %s not a bridge port\n",
939 pv = nbp_get_vlan_info(p);
941 if (!pv || !test_bit(vid, pv->vlan_bitmap)) {
942 pr_info("bridge: RTM_DELNEIGH with unconfigured "
943 "vlan %d on port %s\n", vid, dev->name);
947 err = __br_fdb_delete(p, addr, vid);
950 err &= __br_fdb_delete(p, addr, 0);
954 /* We have vlans configured on this port and user didn't
955 * specify a VLAN. To be nice, add/update entry for every
958 for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
959 err &= __br_fdb_delete(p, addr, vid);
966 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p)
968 struct net_bridge_fdb_entry *fdb, *tmp;
974 for (i = 0; i < BR_HASH_SIZE; i++) {
975 hlist_for_each_entry(fdb, &br->hash[i], hlist) {
976 /* We only care for static entries */
980 err = dev_uc_add(p->dev, fdb->addr.addr);
988 for (i = 0; i < BR_HASH_SIZE; i++) {
989 hlist_for_each_entry(tmp, &br->hash[i], hlist) {
990 /* If we reached the fdb that failed, we can stop */
994 /* We only care for static entries */
998 dev_uc_del(p->dev, tmp->addr.addr);
1004 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p)
1006 struct net_bridge_fdb_entry *fdb;
1011 for (i = 0; i < BR_HASH_SIZE; i++) {
1012 hlist_for_each_entry_rcu(fdb, &br->hash[i], hlist) {
1013 /* We only care for static entries */
1014 if (!fdb->is_static)
1017 dev_uc_del(p->dev, fdb->addr.addr);
1022 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
1023 const unsigned char *addr, u16 vid)
1025 struct hlist_head *head;
1026 struct net_bridge_fdb_entry *fdb;
1030 spin_lock_bh(&br->hash_lock);
1032 head = &br->hash[br_mac_hash(addr, vid)];
1033 fdb = fdb_find(head, addr, vid);
1035 fdb = fdb_create(head, p, addr, vid);
1040 fdb->added_by_external_learn = 1;
1041 fdb_notify(br, fdb, RTM_NEWNEIGH);
1042 } else if (fdb->added_by_external_learn) {
1044 fdb->updated = fdb->used = jiffies;
1045 } else if (!fdb->added_by_user) {
1046 /* Take over SW learned entry */
1047 fdb->added_by_external_learn = 1;
1048 fdb->updated = jiffies;
1049 fdb_notify(br, fdb, RTM_NEWNEIGH);
1053 spin_unlock_bh(&br->hash_lock);
1058 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
1059 const unsigned char *addr, u16 vid)
1061 struct hlist_head *head;
1062 struct net_bridge_fdb_entry *fdb;
1066 spin_lock_bh(&br->hash_lock);
1068 head = &br->hash[br_mac_hash(addr, vid)];
1069 fdb = fdb_find(head, addr, vid);
1070 if (fdb && fdb->added_by_external_learn)
1071 fdb_delete(br, fdb);
1075 spin_unlock_bh(&br->hash_lock);