mtd_ooblayout_get_bytes(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, this is the mtd_ooblayout_get_bytes(9) page from the Kernel API Manual 💖 and yes it’s exactly what it sounds like: extracting OOB bytes from the oob buffer. The vibes are kernel-core, the goal is byte extraction, and honestly? slay.

✨ NAME ✨

mtd_ooblayout_get_bytes — Extract OOB bytes from the oob buffer 🎀

🦋 SYNOPSIS 🦋

int mtd_ooblayout_get_bytes (struct mtd_info *mtd , u8 *buf , const u8 *oobbuf , int start , int nbytes , int (*iter)(struct mtd_info *, int section, struct mtd_oob_region *oobregion) );

💅 ARGUMENTS 💅

  • mtd — mtd info structure, the main-character context bestie 🫶
  • buf — destination buffer to store OOB bytes, aka the cute little drop-off spot 💌
  • oobbuf — OOB buffer, the source pile of bytes 🌈
  • start — first byte to retrieve, where the snack run begins 🍓
  • nbytes — number of bytes to retrieve, the snack count no cap 🔥
  • iter — section iterator, the little tour guide for sections 🧚

🌸 DESCRIPTION 🌸

okay so the actual tea: this extracts bytes attached to a specific category (ECC or free) from the OOB buffer and copies them into buf. It’s giving “responsible little byte mover” and honestly it ate. 💅

Returns zero on success, a negative error code otherwise. So yeah: zero = good vibes, negative = the error code said “not today.” 😭

👑 SEE ALSO 👑

Kernel file ./drivers/mtd/mtdcore.c — and the whole friend group is here:

🧚 source/version and date: ./drivers/mtd • October 2026 • mtd_ooblayout_get_bytes(9) — okay bye bestie, go get those bytes 💖✨

📦 where this page comes from