1 /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 #include "hard-interface.h"
21 #include <linux/atomic.h>
22 #include <linux/byteorder/generic.h>
23 #include <linux/errno.h>
26 #include <linux/if_arp.h>
27 #include <linux/if_ether.h>
28 #include <linux/kernel.h>
29 #include <linux/kref.h>
30 #include <linux/list.h>
31 #include <linux/mutex.h>
32 #include <linux/netdevice.h>
33 #include <linux/printk.h>
34 #include <linux/rculist.h>
35 #include <linux/rtnetlink.h>
36 #include <linux/slab.h>
37 #include <linux/spinlock.h>
38 #include <net/net_namespace.h>
39 #include <net/rtnetlink.h>
42 #include "bridge_loop_avoidance.h"
44 #include "distributed-arp-table.h"
45 #include "gateway_client.h"
47 #include "originator.h"
50 #include "soft-interface.h"
52 #include "translation-table.h"
55 * batadv_hardif_release - release hard interface from lists and queue for
56 * free after rcu grace period
57 * @ref: kref pointer of the hard interface
59 void batadv_hardif_release(struct kref *ref)
61 struct batadv_hard_iface *hard_iface;
63 hard_iface = container_of(ref, struct batadv_hard_iface, refcount);
64 dev_put(hard_iface->net_dev);
66 kfree_rcu(hard_iface, rcu);
69 struct batadv_hard_iface *
70 batadv_hardif_get_by_netdev(const struct net_device *net_dev)
72 struct batadv_hard_iface *hard_iface;
75 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
76 if (hard_iface->net_dev == net_dev &&
77 kref_get_unless_zero(&hard_iface->refcount))
89 * batadv_getlink_net - return link net namespace (of use fallback)
90 * @netdev: net_device to check
91 * @fallback_net: return in case get_link_net is not available for @netdev
93 * Return: result of rtnl_link_ops->get_link_net or @fallback_net
95 static const struct net *batadv_getlink_net(const struct net_device *netdev,
96 const struct net *fallback_net)
98 if (!netdev->rtnl_link_ops)
101 if (!netdev->rtnl_link_ops->get_link_net)
104 return netdev->rtnl_link_ops->get_link_net(netdev);
108 * batadv_mutual_parents - check if two devices are each others parent
110 * @net1: 1st devices netns
112 * @net2: 2nd devices netns
114 * veth devices come in pairs and each is the parent of the other!
116 * Return: true if the devices are each others parent, otherwise false
118 static bool batadv_mutual_parents(const struct net_device *dev1,
119 const struct net *net1,
120 const struct net_device *dev2,
121 const struct net *net2)
123 int dev1_parent_iflink = dev_get_iflink(dev1);
124 int dev2_parent_iflink = dev_get_iflink(dev2);
125 const struct net *dev1_parent_net;
126 const struct net *dev2_parent_net;
128 dev1_parent_net = batadv_getlink_net(dev1, net1);
129 dev2_parent_net = batadv_getlink_net(dev2, net2);
131 if (!dev1_parent_iflink || !dev2_parent_iflink)
134 return (dev1_parent_iflink == dev2->ifindex) &&
135 (dev2_parent_iflink == dev1->ifindex) &&
136 net_eq(dev1_parent_net, net2) &&
137 net_eq(dev2_parent_net, net1);
141 * batadv_is_on_batman_iface - check if a device is a batman iface descendant
142 * @net_dev: the device to check
144 * If the user creates any virtual device on top of a batman-adv interface, it
145 * is important to prevent this new interface to be used to create a new mesh
146 * network (this behaviour would lead to a batman-over-batman configuration).
147 * This function recursively checks all the fathers of the device passed as
148 * argument looking for a batman-adv soft interface.
150 * Return: true if the device is descendant of a batman-adv mesh interface (or
151 * if it is a batman-adv interface itself), false otherwise
153 static bool batadv_is_on_batman_iface(const struct net_device *net_dev)
155 struct net *net = dev_net(net_dev);
156 struct net_device *parent_dev;
157 const struct net *parent_net;
160 /* check if this is a batman-adv mesh interface */
161 if (batadv_softif_is_valid(net_dev))
164 /* no more parents..stop recursion */
165 if (dev_get_iflink(net_dev) == 0 ||
166 dev_get_iflink(net_dev) == net_dev->ifindex)
169 parent_net = batadv_getlink_net(net_dev, net);
171 /* recurse over the parent device */
172 parent_dev = __dev_get_by_index((struct net *)parent_net,
173 dev_get_iflink(net_dev));
174 /* if we got a NULL parent_dev there is something broken.. */
176 pr_err("Cannot find parent device\n");
180 if (batadv_mutual_parents(net_dev, net, parent_dev, parent_net))
183 ret = batadv_is_on_batman_iface(parent_dev);
188 static bool batadv_is_valid_iface(const struct net_device *net_dev)
190 if (net_dev->flags & IFF_LOOPBACK)
193 if (net_dev->type != ARPHRD_ETHER)
196 if (net_dev->addr_len != ETH_ALEN)
199 /* no batman over batman */
200 if (batadv_is_on_batman_iface(net_dev))
207 * batadv_is_wifi_netdev - check if the given net_device struct is a wifi
209 * @net_device: the device to check
211 * Return: true if the net device is a 802.11 wireless device, false otherwise.
213 bool batadv_is_wifi_netdev(struct net_device *net_device)
218 #ifdef CONFIG_WIRELESS_EXT
219 /* pre-cfg80211 drivers have to implement WEXT, so it is possible to
220 * check for wireless_handlers != NULL
222 if (net_device->wireless_handlers)
226 /* cfg80211 drivers have to set ieee80211_ptr */
227 if (net_device->ieee80211_ptr)
233 static struct batadv_hard_iface *
234 batadv_hardif_get_active(const struct net_device *soft_iface)
236 struct batadv_hard_iface *hard_iface;
239 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
240 if (hard_iface->soft_iface != soft_iface)
243 if (hard_iface->if_status == BATADV_IF_ACTIVE &&
244 kref_get_unless_zero(&hard_iface->refcount))
255 static void batadv_primary_if_update_addr(struct batadv_priv *bat_priv,
256 struct batadv_hard_iface *oldif)
258 struct batadv_hard_iface *primary_if;
260 primary_if = batadv_primary_if_get_selected(bat_priv);
264 batadv_dat_init_own_addr(bat_priv, primary_if);
265 batadv_bla_update_orig_address(bat_priv, primary_if, oldif);
268 batadv_hardif_put(primary_if);
271 static void batadv_primary_if_select(struct batadv_priv *bat_priv,
272 struct batadv_hard_iface *new_hard_iface)
274 struct batadv_hard_iface *curr_hard_iface;
279 kref_get(&new_hard_iface->refcount);
281 curr_hard_iface = rcu_dereference_protected(bat_priv->primary_if, 1);
282 rcu_assign_pointer(bat_priv->primary_if, new_hard_iface);
287 bat_priv->algo_ops->iface.primary_set(new_hard_iface);
288 batadv_primary_if_update_addr(bat_priv, curr_hard_iface);
292 batadv_hardif_put(curr_hard_iface);
296 batadv_hardif_is_iface_up(const struct batadv_hard_iface *hard_iface)
298 if (hard_iface->net_dev->flags & IFF_UP)
304 static void batadv_check_known_mac_addr(const struct net_device *net_dev)
306 const struct batadv_hard_iface *hard_iface;
309 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
310 if ((hard_iface->if_status != BATADV_IF_ACTIVE) &&
311 (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED))
314 if (hard_iface->net_dev == net_dev)
317 if (!batadv_compare_eth(hard_iface->net_dev->dev_addr,
321 pr_warn("The newly added mac address (%pM) already exists on: %s\n",
322 net_dev->dev_addr, hard_iface->net_dev->name);
323 pr_warn("It is strongly recommended to keep mac addresses unique to avoid problems!\n");
329 * batadv_hardif_recalc_extra_skbroom() - Recalculate skbuff extra head/tailroom
330 * @soft_iface: netdev struct of the mesh interface
332 static void batadv_hardif_recalc_extra_skbroom(struct net_device *soft_iface)
334 const struct batadv_hard_iface *hard_iface;
335 unsigned short lower_header_len = ETH_HLEN;
336 unsigned short lower_headroom = 0;
337 unsigned short lower_tailroom = 0;
338 unsigned short needed_headroom;
341 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
342 if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
345 if (hard_iface->soft_iface != soft_iface)
348 lower_header_len = max_t(unsigned short, lower_header_len,
349 hard_iface->net_dev->hard_header_len);
351 lower_headroom = max_t(unsigned short, lower_headroom,
352 hard_iface->net_dev->needed_headroom);
354 lower_tailroom = max_t(unsigned short, lower_tailroom,
355 hard_iface->net_dev->needed_tailroom);
359 needed_headroom = lower_headroom + (lower_header_len - ETH_HLEN);
360 needed_headroom += batadv_max_header_len();
362 /* fragmentation headers don't strip the unicast/... header */
363 needed_headroom += sizeof(struct batadv_frag_packet);
365 soft_iface->needed_headroom = needed_headroom;
366 soft_iface->needed_tailroom = lower_tailroom;
369 int batadv_hardif_min_mtu(struct net_device *soft_iface)
371 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
372 const struct batadv_hard_iface *hard_iface;
373 int min_mtu = INT_MAX;
376 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
377 if ((hard_iface->if_status != BATADV_IF_ACTIVE) &&
378 (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED))
381 if (hard_iface->soft_iface != soft_iface)
384 min_mtu = min_t(int, hard_iface->net_dev->mtu, min_mtu);
388 if (atomic_read(&bat_priv->fragmentation) == 0)
391 /* with fragmentation enabled the maximum size of internally generated
392 * packets such as translation table exchanges or tvlv containers, etc
393 * has to be calculated
395 min_mtu = min_t(int, min_mtu, BATADV_FRAG_MAX_FRAG_SIZE);
396 min_mtu -= sizeof(struct batadv_frag_packet);
397 min_mtu *= BATADV_FRAG_MAX_FRAGMENTS;
400 /* report to the other components the maximum amount of bytes that
401 * batman-adv can send over the wire (without considering the payload
402 * overhead). For example, this value is used by TT to compute the
403 * maximum local table table size
405 atomic_set(&bat_priv->packet_size_max, min_mtu);
407 /* the real soft-interface MTU is computed by removing the payload
408 * overhead from the maximum amount of bytes that was just computed.
410 * However batman-adv does not support MTUs bigger than ETH_DATA_LEN
412 return min_t(int, min_mtu - batadv_max_header_len(), ETH_DATA_LEN);
415 /* adjusts the MTU if a new interface with a smaller MTU appeared. */
416 void batadv_update_min_mtu(struct net_device *soft_iface)
418 soft_iface->mtu = batadv_hardif_min_mtu(soft_iface);
420 /* Check if the local translate table should be cleaned up to match a
421 * new (and smaller) MTU.
423 batadv_tt_local_resize_to_mtu(soft_iface);
427 batadv_hardif_activate_interface(struct batadv_hard_iface *hard_iface)
429 struct batadv_priv *bat_priv;
430 struct batadv_hard_iface *primary_if = NULL;
432 if (hard_iface->if_status != BATADV_IF_INACTIVE)
435 bat_priv = netdev_priv(hard_iface->soft_iface);
437 bat_priv->algo_ops->iface.update_mac(hard_iface);
438 hard_iface->if_status = BATADV_IF_TO_BE_ACTIVATED;
440 /* the first active interface becomes our primary interface or
441 * the next active interface after the old primary interface was removed
443 primary_if = batadv_primary_if_get_selected(bat_priv);
445 batadv_primary_if_select(bat_priv, hard_iface);
447 batadv_info(hard_iface->soft_iface, "Interface activated: %s\n",
448 hard_iface->net_dev->name);
450 batadv_update_min_mtu(hard_iface->soft_iface);
452 if (bat_priv->algo_ops->iface.activate)
453 bat_priv->algo_ops->iface.activate(hard_iface);
457 batadv_hardif_put(primary_if);
461 batadv_hardif_deactivate_interface(struct batadv_hard_iface *hard_iface)
463 if ((hard_iface->if_status != BATADV_IF_ACTIVE) &&
464 (hard_iface->if_status != BATADV_IF_TO_BE_ACTIVATED))
467 hard_iface->if_status = BATADV_IF_INACTIVE;
469 batadv_info(hard_iface->soft_iface, "Interface deactivated: %s\n",
470 hard_iface->net_dev->name);
472 batadv_update_min_mtu(hard_iface->soft_iface);
476 * batadv_master_del_slave - remove hard_iface from the current master interface
477 * @slave: the interface enslaved in another master
478 * @master: the master from which slave has to be removed
480 * Invoke ndo_del_slave on master passing slave as argument. In this way slave
481 * is free'd and master can correctly change its internal state.
483 * Return: 0 on success, a negative value representing the error otherwise
485 static int batadv_master_del_slave(struct batadv_hard_iface *slave,
486 struct net_device *master)
494 if (master->netdev_ops->ndo_del_slave)
495 ret = master->netdev_ops->ndo_del_slave(master, slave->net_dev);
500 int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
501 struct net *net, const char *iface_name)
503 struct batadv_priv *bat_priv;
504 struct net_device *soft_iface, *master;
505 __be16 ethertype = htons(ETH_P_BATMAN);
506 int max_header_len = batadv_max_header_len();
509 if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
512 kref_get(&hard_iface->refcount);
514 soft_iface = dev_get_by_name(net, iface_name);
517 soft_iface = batadv_softif_create(net, iface_name);
524 /* dev_get_by_name() increases the reference counter for us */
525 dev_hold(soft_iface);
528 if (!batadv_softif_is_valid(soft_iface)) {
529 pr_err("Can't create batman mesh interface %s: already exists as regular interface\n",
535 /* check if the interface is enslaved in another virtual one and
536 * in that case unlink it first
538 master = netdev_master_upper_dev_get(hard_iface->net_dev);
539 ret = batadv_master_del_slave(hard_iface, master);
543 hard_iface->soft_iface = soft_iface;
544 bat_priv = netdev_priv(hard_iface->soft_iface);
546 if (bat_priv->num_ifaces >= UINT_MAX) {
551 ret = netdev_master_upper_dev_link(hard_iface->net_dev,
552 soft_iface, NULL, NULL);
556 ret = bat_priv->algo_ops->iface.enable(hard_iface);
560 hard_iface->if_num = bat_priv->num_ifaces;
561 bat_priv->num_ifaces++;
562 hard_iface->if_status = BATADV_IF_INACTIVE;
563 ret = batadv_orig_hash_add_if(hard_iface, bat_priv->num_ifaces);
565 bat_priv->algo_ops->iface.disable(hard_iface);
566 bat_priv->num_ifaces--;
567 hard_iface->if_status = BATADV_IF_NOT_IN_USE;
571 kref_get(&hard_iface->refcount);
572 hard_iface->batman_adv_ptype.type = ethertype;
573 hard_iface->batman_adv_ptype.func = batadv_batman_skb_recv;
574 hard_iface->batman_adv_ptype.dev = hard_iface->net_dev;
575 dev_add_pack(&hard_iface->batman_adv_ptype);
577 batadv_info(hard_iface->soft_iface, "Adding interface: %s\n",
578 hard_iface->net_dev->name);
580 if (atomic_read(&bat_priv->fragmentation) &&
581 hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len)
582 batadv_info(hard_iface->soft_iface,
583 "The MTU of interface %s is too small (%i) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to %i would solve the problem.\n",
584 hard_iface->net_dev->name, hard_iface->net_dev->mtu,
585 ETH_DATA_LEN + max_header_len);
587 if (!atomic_read(&bat_priv->fragmentation) &&
588 hard_iface->net_dev->mtu < ETH_DATA_LEN + max_header_len)
589 batadv_info(hard_iface->soft_iface,
590 "The MTU of interface %s is too small (%i) to handle the transport of batman-adv packets. If you experience problems getting traffic through try increasing the MTU to %i.\n",
591 hard_iface->net_dev->name, hard_iface->net_dev->mtu,
592 ETH_DATA_LEN + max_header_len);
594 if (batadv_hardif_is_iface_up(hard_iface))
595 batadv_hardif_activate_interface(hard_iface);
597 batadv_err(hard_iface->soft_iface,
598 "Not using interface %s (retrying later): interface not active\n",
599 hard_iface->net_dev->name);
601 batadv_hardif_recalc_extra_skbroom(soft_iface);
603 if (bat_priv->algo_ops->iface.enabled)
604 bat_priv->algo_ops->iface.enabled(hard_iface);
610 netdev_upper_dev_unlink(hard_iface->net_dev, soft_iface);
612 hard_iface->soft_iface = NULL;
615 batadv_hardif_put(hard_iface);
619 void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface,
620 enum batadv_hard_if_cleanup autodel)
622 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
623 struct batadv_hard_iface *primary_if = NULL;
625 batadv_hardif_deactivate_interface(hard_iface);
627 if (hard_iface->if_status != BATADV_IF_INACTIVE)
630 batadv_info(hard_iface->soft_iface, "Removing interface: %s\n",
631 hard_iface->net_dev->name);
632 dev_remove_pack(&hard_iface->batman_adv_ptype);
633 batadv_hardif_put(hard_iface);
635 bat_priv->num_ifaces--;
636 batadv_orig_hash_del_if(hard_iface, bat_priv->num_ifaces);
638 primary_if = batadv_primary_if_get_selected(bat_priv);
639 if (hard_iface == primary_if) {
640 struct batadv_hard_iface *new_if;
642 new_if = batadv_hardif_get_active(hard_iface->soft_iface);
643 batadv_primary_if_select(bat_priv, new_if);
646 batadv_hardif_put(new_if);
649 bat_priv->algo_ops->iface.disable(hard_iface);
650 hard_iface->if_status = BATADV_IF_NOT_IN_USE;
652 /* delete all references to this hard_iface */
653 batadv_purge_orig_ref(bat_priv);
654 batadv_purge_outstanding_packets(bat_priv, hard_iface);
655 dev_put(hard_iface->soft_iface);
657 netdev_upper_dev_unlink(hard_iface->net_dev, hard_iface->soft_iface);
658 batadv_hardif_recalc_extra_skbroom(hard_iface->soft_iface);
660 /* nobody uses this interface anymore */
661 if (bat_priv->num_ifaces == 0) {
662 batadv_gw_check_client_stop(bat_priv);
664 if (autodel == BATADV_IF_CLEANUP_AUTO)
665 batadv_softif_destroy_sysfs(hard_iface->soft_iface);
668 hard_iface->soft_iface = NULL;
669 batadv_hardif_put(hard_iface);
673 batadv_hardif_put(primary_if);
676 static struct batadv_hard_iface *
677 batadv_hardif_add_interface(struct net_device *net_dev)
679 struct batadv_hard_iface *hard_iface;
684 if (!batadv_is_valid_iface(net_dev))
689 hard_iface = kzalloc(sizeof(*hard_iface), GFP_ATOMIC);
693 ret = batadv_sysfs_add_hardif(&hard_iface->hardif_obj, net_dev);
697 hard_iface->if_num = 0;
698 hard_iface->net_dev = net_dev;
699 hard_iface->soft_iface = NULL;
700 hard_iface->if_status = BATADV_IF_NOT_IN_USE;
702 ret = batadv_debugfs_add_hardif(hard_iface);
706 INIT_LIST_HEAD(&hard_iface->list);
707 INIT_HLIST_HEAD(&hard_iface->neigh_list);
709 mutex_init(&hard_iface->bat_iv.ogm_buff_mutex);
710 spin_lock_init(&hard_iface->neigh_list_lock);
711 kref_init(&hard_iface->refcount);
713 hard_iface->num_bcasts = BATADV_NUM_BCASTS_DEFAULT;
714 if (batadv_is_wifi_netdev(net_dev))
715 hard_iface->num_bcasts = BATADV_NUM_BCASTS_WIRELESS;
717 batadv_v_hardif_init(hard_iface);
719 batadv_check_known_mac_addr(hard_iface->net_dev);
720 kref_get(&hard_iface->refcount);
721 list_add_tail_rcu(&hard_iface->list, &batadv_hardif_list);
726 batadv_sysfs_del_hardif(&hard_iface->hardif_obj);
735 static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface)
739 /* first deactivate interface */
740 if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
741 batadv_hardif_disable_interface(hard_iface,
742 BATADV_IF_CLEANUP_KEEP);
744 if (hard_iface->if_status != BATADV_IF_NOT_IN_USE)
747 hard_iface->if_status = BATADV_IF_TO_BE_REMOVED;
748 batadv_debugfs_del_hardif(hard_iface);
749 batadv_sysfs_del_hardif(&hard_iface->hardif_obj);
750 batadv_hardif_put(hard_iface);
753 void batadv_hardif_remove_interfaces(void)
755 struct batadv_hard_iface *hard_iface, *hard_iface_tmp;
758 list_for_each_entry_safe(hard_iface, hard_iface_tmp,
759 &batadv_hardif_list, list) {
760 list_del_rcu(&hard_iface->list);
761 batadv_hardif_remove_interface(hard_iface);
767 * batadv_hard_if_event_softif() - Handle events for soft interfaces
768 * @event: NETDEV_* event to handle
769 * @net_dev: net_device which generated an event
771 * Return: NOTIFY_* result
773 static int batadv_hard_if_event_softif(unsigned long event,
774 struct net_device *net_dev)
776 struct batadv_priv *bat_priv;
779 case NETDEV_REGISTER:
780 batadv_sysfs_add_meshif(net_dev);
781 bat_priv = netdev_priv(net_dev);
782 batadv_softif_create_vlan(bat_priv, BATADV_NO_FLAGS);
784 case NETDEV_CHANGENAME:
785 batadv_debugfs_rename_meshif(net_dev);
792 static int batadv_hard_if_event(struct notifier_block *this,
793 unsigned long event, void *ptr)
795 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
796 struct batadv_hard_iface *hard_iface;
797 struct batadv_hard_iface *primary_if = NULL;
798 struct batadv_priv *bat_priv;
800 if (batadv_softif_is_valid(net_dev))
801 return batadv_hard_if_event_softif(event, net_dev);
803 hard_iface = batadv_hardif_get_by_netdev(net_dev);
804 if (!hard_iface && (event == NETDEV_REGISTER ||
805 event == NETDEV_POST_TYPE_CHANGE))
806 hard_iface = batadv_hardif_add_interface(net_dev);
813 batadv_hardif_activate_interface(hard_iface);
815 case NETDEV_GOING_DOWN:
817 batadv_hardif_deactivate_interface(hard_iface);
819 case NETDEV_UNREGISTER:
820 case NETDEV_PRE_TYPE_CHANGE:
821 list_del_rcu(&hard_iface->list);
823 batadv_hardif_remove_interface(hard_iface);
825 case NETDEV_CHANGEMTU:
826 if (hard_iface->soft_iface)
827 batadv_update_min_mtu(hard_iface->soft_iface);
829 case NETDEV_CHANGEADDR:
830 if (hard_iface->if_status == BATADV_IF_NOT_IN_USE)
833 batadv_check_known_mac_addr(hard_iface->net_dev);
835 bat_priv = netdev_priv(hard_iface->soft_iface);
836 bat_priv->algo_ops->iface.update_mac(hard_iface);
838 primary_if = batadv_primary_if_get_selected(bat_priv);
842 if (hard_iface == primary_if)
843 batadv_primary_if_update_addr(bat_priv, NULL);
845 case NETDEV_CHANGENAME:
846 batadv_debugfs_rename_hardif(hard_iface);
853 batadv_hardif_put(hard_iface);
856 batadv_hardif_put(primary_if);
860 struct notifier_block batadv_hard_if_notifier = {
861 .notifier_call = batadv_hard_if_event,