fsverity_ini..._tree_params(9)

🌸 fsverity_init_merkle_tree_params 🌸

okay bestie, so this is a page straight out of the Kernel API Manual — like, actual kernel-level stuff, and yes you can sit with us 💅. The function is fsverity_init_merkle_tree_params, and its whole job is to get your Merkle tree parameters all set up and cute before anything else happens. No cap.

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✨ SYNOPSIS ✨

int fsverity_init_merkle_tree_params (struct merkle_tree_params *params
, const struct inode *inode , unsigned int hash_algorithm , unsigned int
log_blocksize , const u8 *salt , size_t salt_size );

literally the whole signature, character for character, because I would never do you dirty like that 🫶

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🎀 ARGUMENTS 🎀

• params — the parameters struct you're initializing. this is the main character of the whole operation, honestly 💖
• inode — the inode the Merkle tree is being built for. it's giving "the reason we're all here" energy.
• hash_algorithm — the number of the hash algorithm to use. just the number, bestie, not the algorithm itself 🔢
• log_blocksize — log base 2 of the block size you want. so like, math. she's a little mathy but we respect her 🧚
• salt — pointer to the salt. it's optional, so if you don't have one, no biggie 💜
• salt_size — the size of the salt — and yes, it's possibly 0. zero is a valid size, we love that for her ⭐

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🦋 DESCRIPTION 🦋

okay so here's the vibe check. this function validates the hash algorithm and the block size first (gotta make sure everything checks out, periodt), then it computes the tree topology — the num levels, the num blocks in each level, etc. — and then it initializes params with all of it. basically it's doing the whole layout calculation and the setup in one go. obsessed 🔥

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💀 RETURN 💀

• 0 on success, slay 💅
• -errno on failure, and yeah, that's the whole story 😭

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🌈 SEE ALSO 🌈

• Kernel file ./fs/verity/open.c — go look, iykyk 👑

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and that's the page! brought to you by ./fs/verity, dated October 2026 — catching you in the future, bestie, mwah 🎀💖✨