batadv_hardi...le_interface(9)

💅 batadv_hardif_enable_interface(9) — like, the kernel API manual, but make it make sense 🎀

okay bestie, so this whole page lives in the Kernel API Manual (yes, the (9) section, we love a kernel-internals moment 🔥), and honestly? It's giving "one little function, one big job". Let's get into it ✨

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🌸 NAME 🌸

batadv_hardif_enable_interface — no cap, this thing enslaves an interface to a mesh interface 🦋

Like, it takes a normal network interface and ropes it into doing batman-adv mesh work. Slay, honestly. 👑

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✨ SYNOPSIS ✨

int batadv_hardif_enable_interface (struct net_device *net_dev , struct
net_device *mesh_iface );

So it returns an int, takes two struct net_device * pointers, and yes that spacing is exactly how the manual prints it — we do NOT edit the source material in this house 💅

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🫶 ARGUMENTS 🫶

• net_dev — the netdev struct of the interface you're adding to the mesh interface. This is the baby getting adopted into the mesh family 🥺
• mesh_iface — the netdev struct of the mesh interface itself. This is the parent, the main character, the one with the vibe 👑

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🌈 RETURN 🌈

0 on success 🎉 — or a negative error number if things go wrong 😭 (classic kernel move: zero means good, negative means go touch grass and read errno).

fr fr, check that return value. 0 = the interface got enslaved, no problem. Anything negative = it didn't, and the number tells you why.

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🦋 SEE ALSO 🦋

First up, the actual kernel file this lives in:

• Kernel file ./net/batman-adv/hard-interface.c

and then, because batman-adv has, like, a lot of friends 🫂 — every single one of them, bestie, all thirty-five 🍓:

• 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_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_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)

iykyk — that's the whole hard-interface.c friend group 💀 (yes, batadv_hardif_enable_interface's mirror-image buddy batadv_hardif_disable_interface(9) is in there, obviously, they come as a set 🧚)

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🎀 sign-off 🎀

This lil masterpiece lives under the source path ./net/batman-adv, and it's dated October 2026 — so like, mark your calendars bestie, the mesh is eternal ⭐💜

periodt. go read the source. 🫶