batadv_is_on_batman_iface(9)

💖 batadv_is_on_batman_iface(9) — Kernel API Manual 💖

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✨ NAME ✨

okay so bestie, this is batadv_is_on_batman_iface — it literally checks if a device is a batman iface descendant. iconic behavior, no cap.

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💅 SYNOPSIS 💅

bool batadv_is_on_batman_iface (const struct net_device *net_dev );

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🎀 ARGUMENTS 🎀

• net_dev — the device to check. that's the one, bestie 🫶

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🦋 DESCRIPTION 🦋

okay so picture this: the user creates any virtual device on top of a batman-adv interface. we highkey need to prevent this new interface from being used to create a new mesh network, because that behaviour would lead to a batman-over-batman configuration and we are not doing that 💀

so this function recursively checks all the fathers of the device passed as argument, looking for a batman-adv mesh interface. yes, “fathers” is the word here — we don't make the rules, we just recursively vibe-check them 💅

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🌈 RETURN 🌈

true if the device is descendant of a batman-adv mesh interface (or if it is a batman-adv interface itself), false otherwise. periodt. ✨

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🔥 SEE ALSO 🔥

Kernel file ./net/batman-adv/hard-interface.c — and here's the whole function friend group, bestie:

• batadv_hardif_release(9)
• batadv_hardif_get_by_netdev(9)
• batadv_getlink_net(9)
• batadv_mutual_parents(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_check_known_mac_addr(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)

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💌 cute little sign-off: source/version ./net/batman-adv · date October 2026 · batadv_is_on_batman_iface(9) — byeee bestie, go check those fathers recursively 🫶💖