ubi_eba_copy_leb(9)

📦 version 7.3.1, in nixpkgs unstable

💖 ubi_eba_copy_leb(9) — the glow-up edition 💖

okay so bestie, we're deep in the UBI (unsorted block images) part of the kernel here, and this one is literally about moving a logical eraseblock from one physical eraseblock to another. it's giving "moving day but for flash memory" energy. let's get into it ✨

🌸 NAME 🌸

ubi_eba_copy_leb — copy logical eraseblock. that's it, that's the vibe. 🎀

🦋 SYNOPSIS 🦋

int ubi_eba_copy_leb (struct ubi_device *ubi , int from , int to ,
       struct ubi_vid_io_buf *vidb );

like, look at that signature. iconic. 💅

🍓 ARGUMENTS 🍓

  • ubi — UBI device description object. this is the main character of the operation, fr fr. 👑
  • from — physical eraseblock number from where to copy. the starting point, the origin story. 🚩
  • to — physical eraseblock number where to copy. the destination, the new home. 🏡
  • vidb — data structure from where the VID header is derived. so like, the source of truth for the VID header info. 💾

🔥 DESCRIPTION 🔥

okay so here's the tea: this function copies a logical eraseblock from physical eraseblock from to physical eraseblock to. the way it just scoops up the data and plops it somewhere else? slay. 💅✨

⚠️ heads up bestie — the vid_hdr buffer may be changed by this function. so don't come for it later expecting it to be exactly how you left it, iykyk. 🫶

and it returns:

  • 0 in case of success — we love a W. ✅ 🎉
  • MOVE_CANCEL_RACE, MOVE_TARGET_WR_ERR, MOVE_TARGET_BITFLIPS, etc — these are the plot twists, the little "hmm not quite" returns. 😭
  • a negative error code in case of failure — the flop era. 💀

🌈 SEE ALSO 🌈

okay this list is long but every single one is part of the squad, so we're listing them all. no skipping, periodt. 👑

kernel file ./drivers/mtd/ubi/eba.c, plus:

like, that's the whole friend group right there. go read up on them if you wanna understand the full lore. 📚💖

and that's the page bestie! this gem lives in ./drivers/mtd/ubi and it's dated October 2026, so it's got that fresh-from-the-future energy. catch you in the kernel, mwah! 💋🫶🌸✨🎀🦋👑💅

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