btree_insert(9)

✨ btree_insert(9) ✨

okay so bestie, listen up 💖 you know how we deal with Kernel API Manual stuff? this one's about btree_insert and it's lowkey pretty straightforward. let me put you on 🫶

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🎀 SYNOPSIS 🎀

int btree_insert (struct btree_head *head , struct btree_geo *geo ,
unsigned long *key , void *val , gfp_t gfp );

that's the whole vibe, no cap ✨

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🌸 ARGUMENTS 🌸

• head — the btree you're adding to, like the actual btree bestie 💅
• geo — the btree geometry, iykyk 🦋
• key — the key to add, and fr fr it must not already be present ⚠️ don't come in here duplicating keys, that's not the move
• val — the value to add, and it must not be NULL bestie, like seriously 🙈
• gfp — allocation flags for node allocations, the whole "how much room can I take up" situation 💀

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💜 DESCRIPTION 💜

okay so here's the tea 🔥 this function returns 0 if the item could be added, or an error code if it failed 💀 and listen—it may fail due to memory pressure, so don't come for it if things get tight in there 😭 it's doing its best under pressure, literally main character energy ngl 👑

bestie the rule is simple: success gives you 0, failure gives you an error code. always do your vibe check on the return value, periodt ✨

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🌈 SEE ALSO 🌈

the whole friend group, no gatekeeping 🫶:

1. Kernel file ./include/linux/btree.h B+Tree basics(9)
2. struct btree_head(9)
3. btree_alloc(9)
4. btree_free(9)
5. btree_init_mempool(9)
6. btree_init(9)
7. btree_destroy(9)
8. btree_lookup(9)
9. btree_update(9)
10. btree_remove(9)
11. btree_merge(9)
12. btree_last(9)
13. btree_get_prev(9)

they're all literally iconic and you should probably read them too 🦋✨

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this lil page came straight out of ./include/linux and it's stamped October 2026 — obsessed with the whole era honestly 🫶💖 slay and stay safe out there bestie, mwah 💅✨