batadv_hash_add(9)

💖 batadv_hash_add(9) 💖

okay so this is the <pink>Kernel API Manual</pink> page for batadv_hash_add and bestie, it's literally just about dropping your data into a hashtable. that's it. that's the whole vibe. let's get into it 🫶

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✨ NAME ✨

batadv_hash_add — adds data to the hashtable 🎀

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🌸 SYNOPSIS 🌸

int batadv_hash_add (struct batadv_hashtable *hash ,
batadv_hashdata_compare_cb compare , batadv_hashdata_choose_cb choose ,
const void *data , struct hlist_node *data_node );

like, yes, that's the whole signature. five things go in, an int comes out. iconic behavior honestly 💅

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🦋 ARGUMENTS 🦋

• hash — your storage hash table. the actual place where things live. it's giving "the closet you're throwing everything into" energy 🧚
• compare — a callback that determines whether 2 hash elements are identical. yes, 2, the manpage said 2, we respect 2 ✌️
• choose — a callback that calculates the hash index. it's the little matchmaker deciding which bucket your data ends up in 💘
• data — the data passed to the aforementioned callbacks as an argument. so it gets handed off to both compare and choose, iykyk 🌈
• data_node — the element to be added. the main character of this whole operation, no cap 👑

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⭐ RETURN ⭐

• 0 on success — slay, it worked 🎉
• 1 if the element already is in the hash — not me showing up to the party already on the guest list 💀
• -1 on error — tragic, but we move 😭

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🔥 SEE ALSO 🔥

• Kernel file ./net/batman-adv/hash.h
• batadv_hashdata_compare_cb(9)
• batadv_hashdata_choose_cb(9)
• batadv_hashdata_free_cb(9)
• struct batadv_hashtable(9)
• batadv_hash_remove(9)

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lowkey the whole lore lives in ./net/batman-adv/hash.h — go read it bestie, it's giving required reading 📚✨

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k that's the page!! this one's from the ./net/batman-adv source tree, dated October 2026 — so go forth, add your data, and remember: <hotpink>0is success,1means it's already there,-1 means something went wrong.` 💜🦋🌷 mwah, bye bestie! 🫶