iptfs_get_inner_mtu(9)

✨ iptfs_get_inner_mtu(9) ✨

okay so bestie, welcome to the Kernel API Manual page for iptfs_get_inner_mtu 💖 this one is literally here to return the inner MTU for an IPTFS xfrm. no cap, that’s the whole vibe.

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🌸 NAME 🌸

iptfs_get_inner_mtu — return the inner MTU for an IPTFS xfrm. periodt 💅

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🦋 SYNOPSIS 🦋

u32 iptfs_get_inner_mtu (struct xfrm_state *x , int outer_mtu );

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🎀 ARGUMENTS 🎀

• x — xfrm state. that’s the state bestie 🫶
• outer_mtu — Outer MTU for the encapsulated packet. yes, the outer one ✨

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💜 RETURN 💜

it returns the correct MTU, taking into account the encap overhead. the way that overhead gets accounted for… iconic 😌

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🌈 SEE ALSO 🌈

go peek at these next, iykyk 👑

• Kernel file ./net/xfrm/xfrm_iptfs.c
• IPTFS_DEFAULT_DROP_TIME_USECS(9)
• IPTFS_DEFAULT_REORDER_WINDOW(9)
• IPTFS_DEFAULT_INIT_DELAY_USECS(9)
• IPTFS_DEFAULT_MAX_QUEUE_SIZE(9)
• struct xfrm_iptfs_config(9)
• struct xfrm_iptfs_data(9)
• iptfs_alloc_skb(9)
• iptfs_skb_head_to_frag(9)
• struct iptfs_skb_frag_walk(9)
• iptfs_skb_prepare_frag_walk(9)
• iptfs_skb_can_add_frags(9)
• iptfs_skb_add_frags(9)
• iptfs_pskb_add_frags(9)
• iptfs_pskb_extract_seq(9)
• iptfs_input_save_runt(9)
• __iptfs_iphlen(9)
• __iptfs_iplen(9)
• iptfs_complete_inner_skb(9)
• iptfs_reassem_abort(9)
• iptfs_reassem_done(9)
• iptfs_reassem_cont(9)
• iptfs_input_ordered(9)
• iptfs_drop_timer(9)
• iptfs_input(9)
• iptfs_enqueue(9)
• iptfs_copy_create_frag(9)
• iptfs_copy_create_frags(9)
• iptfs_first_skb(9)
• iptfs_encap_add_ipv4(9)
• iptfs_encap_add_ipv6(9)
• iptfs_prepare_output(9)
• __iptfs_get_inner_mtu(9)
• iptfs_user_init(9)

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this manual page moment was brought to you by the ./net/xfrm source, dated October 2026 🎀 bestie you’re soooo welcome, now go read the whole kernel tree like the main character you are 💖✨