batadv_hardi...te_interface(9)

🦋 batadv_hardif_activate_interface — Kernel API Manual energy ✨

okay so bestie, welcome to the Kernel API Manual (that's the manual name, iykyk 🎀), and today's main character is batadv_hardif_activate_interface(9). she's giving "glow up moment for a network interface" and honestly? obsessed. 💅

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✨ NAME ✨

batadv_hardif_activate_interface — move a hard interface to the active state 🦋

like, the whole point. she takes a hard interface that is not yet active and goes "bestie, you're UP now." periodt.

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🌸 SYNOPSIS 🌸

void batadv_hardif_activate_interface (struct batadv_hard_iface *hard_iface );

no return value, no drama, just void and vibes ✨

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💜 ARGUMENTS 💜

• hard_iface — the interface that has come up 💖 this is the one getting the activation treatment, the whole reason we're here, the guest of honor 🫶

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🔥 DESCRIPTION 🔥

so here's the tea, and ngl it's a good one:

• Activate an interface. that's the core move. she's up, she's live, she's in the active state ⭐
• Select it as the primary interface if no primary is currently active — notice the "if", bestie, that conditional is doing WORK. if there's already a primary, this one does not steal the crown 👑 (no primary = the new one gets the crown. periodt.)
• Invoke the algorithm-specific activate hook. so each routing algorithm gets to run its own little activate situation. whatever the algorithm wants to do on activation, it does it here 🧚

and that's it! three things, all bangers, no filler. main character energy from start to finish 💀✨

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💅 SEE ALSO 💅

okay so this is the extended friend group — everyone linked below is in the batadv cinematic universe (:3) and they all live in the kernel file ./net/batman-adv/hard-interface.c 🍓

• 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_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)

like, thirty-five whole siblings. a whole squad. the wifi_net_device ones are literally a friend group within the friend group 🌈

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quick vibe check 🎀: this page lives at ./net/batman-adv and it's dated October 2026, so she's from the future and she's thriving ✨

and that's the page, bestie — go activate something 💖🦋🌸