batadv_check_known_mac_addr(9)

💖 batadv_check_known_mac_addr(9) 💖

okay bestie, this page is from the Kernel API Manual, and we’re about to get into it. no cap, it’s all about batadv_check_known_mac_addr(9) ✨

🌸 NAME 🌸

batadv_check_known_mac_addr — warn about duplicate hard interface MAC addresses. that’s the whole vibe, and honestly it’s a useful one 🫶

🎀 SYNOPSIS 🎀

void batadv_check_known_mac_addr (const struct batadv_hard_iface
       *hard_iface );

🦋 ARGUMENTS 🦋

• hard_iface — the hard interface that was just added or had its MAC changed. yes bestie, that’s the one we’re checking 💅

💜 DESCRIPTION 💜

okay so the function iterates over all hard interfaces of the same mesh interface. for each one, it looks for another in-use interface that shares the same MAC address as hard_iface. if it finds one, it emits a warning. that’s it! 💖

hard_iface is the hard interface that was just added or had its MAC changed, so this is the “bestie, why are there two of the same MAC?” check 😭🔥

💅 SEE ALSO 💅

the kernel file is ./net/batman-adv/hard-interface.c, and you can go peek at all these (9) pages too:

• batadv_hardif_release(9), batadv_hardif_get_by_netdev(9), batadv_getlink_net(9), batadv_mutual_parents(9), batadv_is_on_batman_iface(9)
• batadv_is_valid_iface(9), __batadv_get_real_netdev(9), batadv_get_real_netdev(9), batadv_is_wext_netdev(9), batadv_is_cfg80211_netdev(9)
• batadv_wifi_flags_evaluate(9), batadv_netdev_get_wifi_flags(9), batadv_hardif_get_wifi_flags(9), batadv_is_wifi_hardif(9), batadv_hardif_no_broadcast(9)
• batadv_hardif_get_active(9), batadv_primary_if_update_addr(9), batadv_primary_if_select(9), batadv_hardif_is_iface_up(9), batadv_hardif_recalc_extra_skbroom(9)
• batadv_hardif_min_mtu(9), batadv_update_min_mtu(9), batadv_hardif_activate_interface(9), batadv_hardif_deactivate_interface(9), batadv_hardif_enable_interface(9)
• batadv_hardif_disable_interface(9), batadv_hard_if_event_meshif(9), batadv_wifi_net_device_insert(9), batadv_wifi_net_device_remove(9), batadv_wifi_net_device_update(9)
• batadv_wifi_net_device_unregister(9), batadv_wifi_net_device_event(9), batadv_hard_if_event(9), batadv_wifi_net_devices_init(9), batadv_wifi_net_devices_deinit(9)

okay that’s the whole page bestie 🫶 source/version: ./net/batman-adv, date: October 2026, page: batadv_check_known_mac_addr(9). mwah 💋✨