__ubifs_node_check_hash(9)

📦 version 7.3.1, in nixpkgs unstable

💅 __ubifs_node_check_hash — Kernel API Manual moment

okay so bestie, welcome to the glamorous world of UBIFS authentication ✨ this little function lives in the Kernel API Manual and it is literally the vibe check for your nodes 💖

🎀 NAME 🎀

__ubifs_node_check_hash — check the hash of a node against given hash

no cap, that's the whole gig: you got a node, you got a hash, and we're gonna find out if they're actually matching 👑

✨ SYNOPSIS ✨

int __ubifs_node_check_hash (const struct ubifs_info *c , const void *node , const u8 *expected );

three args, one int, zero drama 🫶

🌸 ARGUMENTS 🌸

  • c — the UBIFS file-system description object 💫 your whole filesystem's little identity card
  • node — literally the node 📦 the thing we're hashing, bestie
  • expected — the expected hash 🎯 the one we're comparing against, u8 pointer and all

🦋 DESCRIPTION 🦋

so the way this works 😭 this function calculates a hash over a node and compares it to the given hash.

Returns 0 if both hashes are equal or authentication is disabled 😌 otherwise a negative error code is returned 💀 like, it's giving "nope, not today."

fr fr, 0 is the green flag here — equal hashes or auth being off both get you the 0. Anything else? negative error code, and you already know what that means 🙈

👑 SEE ALSO 👑

Kernel file ./fs/ubifs/auth.c — and the whole friend group 💜

like, the entire auth.c cinematic universe 🌈 iykyk

lowkey obsessed with how tidy this whole thing is 🎀 ./fs/ubifs brought us this gem back in October 2026, and honestly? iconic. slay, periodt, go check those hashes bestie 💅🔥
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