mtd_ooblayout_set_databytes(9)

📦 version 7.3.1, in nixpkgs unstable

💅 mtd_ooblayout_set_databytes(9)

okay so bestie, welcome to the Kernel API Manual entry for mtd_ooblayout_set_databytes(9) — yes that name is a mouthful, no we're not shortening it, it's iconic and we respect it 🎀

✨ NAME ✨

mtd_ooblayout_set_databytes — literally the function that sets data bytes into the oob buffer 🫶

🌸 SYNOPSIS 🌸

int mtd_ooblayout_set_databytes (struct mtd_info *mtd , const u8
*databuf , u8 *oobbuf , int start , int nbytes );

like… that's the whole signature, copy it exactly please, no cap 💅

🦋 ARGUMENTS 🦋

  • mtd — the mtd info structure, the main character of this whole operation 👑
  • databuf — source buffer to get data bytes from, i.e. where the good stuff lives 🌟
  • oobbuf — the OOB buffer, the destination, the moment 🎯
  • start — first ECC byte to set (yes bestie, the manual says ECC byte here, we keep it verbatim, it's giving legacy naming energy iykyk) 🙈
  • nbytes — number of ECC bytes to set 🍓

🔥 DESCRIPTION 🔥

So the way this works: it functions exactly like mtd_ooblayout_set_bytes, except it acts on free bytes. That's the whole vibe check — same energy, different byte population ✨

It returns zero on success, and a negative error code otherwise. Zero = slay, negative = not slay, that's the rule periodt 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/mtd/mtdcore.c — and honestly the whole friend group is here, look at this roster, it ate 👑

fr fr bestie, these are the references — go read them, they're all lowkey useful 💖

and that's a wrap!! this page lives in ./drivers/mtd, dated October 2026, and if you made it this far you're officially a kernel girlie 🧚‍♀️💜 bye bestie, go set some databytes 🎀

📦 where this page comes from