batadv_frag_create(9)

💅 batadv_frag_create(9) 💅

okay so we're in the Kernel API Manual today bestie, and this page is all about batadv_frag_create(9) — yes that's the title AND the manual name, we're keeping it cute and keeping it real ✨

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🌸 NAME 🌸

batadv_frag_create — create a fragment from skb 💖

like literally, it makes a fragment. from an skb. that's the whole vibe.

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🎀 SYNOPSIS 🎀

struct sk_buff * batadv_frag_create (struct net_device *net_dev , struct
sk_buff *skb , struct batadv_frag_packet *frag_head , unsigned int
fragment_size );

no cap, that's the whole signature 🫶

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✨ ARGUMENTS ✨

• net_dev — the outgoing device for the fragment. it's giving "where is this baby going" 🦋
• skb — the skb you wanna create the fragment from. the raw material, the main character 🔥
• frag_head — the header to use in the new fragment. gotta have a cute lil header, iykyk 👑
• fragment_size — size of the new fragment. numbers matter, periodt ⭐

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💜 DESCRIPTION 💜

so here's the tea ☕ — this function splits the passed skb into two fragments:

1. a new one, with a size matching the passed mtu 🌈
2. the old one, which keeps the rest 💀

and the plot twist? the new skb contains data from the tail of the old skb. tail data. not head. the tail. don't get it twisted bestie 🙈

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🍓 RETURN 🍓

• the new fragment 🎉
• NULL on error 😭 (we don't talk about the error case)

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🧚 SEE ALSO 🧚

kernel file ./net/batman-adv/fragmentation.c — go read it, it's iconic, fr fr:

• batadv_frag_clear_chain(9)
• batadv_frag_purge_orig(9)
• batadv_frag_size_limit(9)
• batadv_frag_init_chain(9)
• batadv_frag_insert_packet(9)
• batadv_frag_merge_packets(9)
• batadv_skb_is_frag(9)
• batadv_frag_skb_buffer(9)
• batadv_frag_skb_fwd(9)
• batadv_frag_send_packet(9)

that's the whole friend group, they all ate 💅

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ok that's the page!! mwah 🫶 from the source ./net/batman-adv, dated October 2026, batman-adv version, signing off — slay, bye bestie 💖✨🎀