batadv_interface_change_mtu(9)

💅 batadv_interface_change_mtu(9) — like, the kernel API manual, bestie

okay so real talk, this is a page from the Kernel API Manual and it's about batadv_interface_change_mtu — the function that handles changing the MTU of a mesh interface 🦋 no cap, that's the whole vibe.

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✨ NAME ✨

batadv_interface_change_mtu — change the MTU of a mesh interface 🎀

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🌸 SYNOPSIS 🌸

int batadv_interface_change_mtu (struct net_device *dev , int new_mtu );

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💖 ARGUMENTS 💖

• dev — the mesh interface you're modifying 🫶 like, this is the thing getting its MTU changed
• new_mtu — the brand new MTU value you're asking for ✨ literally the number you want

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👑 DESCRIPTION 👑

So what it actually does: it validates that new_mtu fits inside the range that the configured hard interfaces actually support 🔥 then it remembers it as the user-configured MTU 💾 periodt.

That's it — vibe check the number, then stash it. Simple. Iconic.

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⭐ RETURN ⭐

• 0 on success 🎉
• -EINVAL if new_mtu is out of range 💀 (out of range = rejected, no cap)

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🌈 SEE ALSO 🌈

Kernel file ./net/batman-adv/mesh-interface.c plus this whole squad of friends:

• batadv_skb_head_push(9)
• batadv_sum_counter(9)
• batadv_interface_stats(9)
• batadv_interface_set_mac_addr(9)
• batadv_interface_set_rx_mode(9)
• batadv_interface_tx(9)
• batadv_interface_rx(9)
• batadv_meshif_vlan_release(9)
• batadv_meshif_vlan_get(9)
• batadv_meshif_create_vlan(9)
• batadv_meshif_destroy_vlan(9)
• batadv_interface_add_vid(9)
• batadv_interface_kill_vid(9)
• batadv_set_lockdep_class_one(9)
• batadv_set_lockdep_class(9)
• batadv_meshif_init_late(9)
• batadv_meshif_slave_add(9)
• batadv_meshif_slave_del(9)
• batadv_get_drvinfo(9)
• batadv_get_strings(9)
• batadv_get_ethtool_stats(9)
• batadv_get_sset_count(9)
• batadv_meshif_free(9)
• batadv_meshif_init_early(9)
• batadv_meshif_validate(9)
• batadv_meshif_newlink(9)
• batadv_meshif_destroy_netlink(9)
• batadv_meshif_is_valid(9)

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and that's the whole page, bestie 🧚💜 shoutout to ./net/batman-adv for keeping it real — dropped October 2026, filed under batadv_interface_change_mtu(9) 🍓 go read it again iykyk 💅