bio_truncate(9)

📦 version 7.3.1, in nixpkgs unstable

✨ bio_truncate — the Kernel API Manual (section 9) ✨

okay bestie, welcome to bio_truncate(9) — yes, section 9, the kernel-functions chapter, we love a niche queen 💅. This is the one that truncates a bio to a small size. Let's get into it, no cap.

🎀 SYNOPSIS 🎀

void bio_truncate (struct bio *bio , unsigned new_size );

literal function signature, copied exactly, do not come for me 🙈

🦋 ARGUMENTS 🦋

  • bio — the bio that's getting truncated. it's the main character here, we're literally shrinking it 👑
  • new_size — the new size you want the bio truncated to. yes it's just called new_size, she's straightforward and we respect that 🫶

🌸 DESCRIPTION 🌸

so the vibe is: truncate the bio down to a new size of new_size. that's the whole job. slay 💅

but wait — there's a plot twist ✨ if bio_op(bio) is REQ_OP_READ, then you zero out the truncated part. like, the bits you chopped off get filled with zeros. don't skip that step bestie, it's giving "important" 🚨

⚠️ fr fr: this function should only be used for handling corner cases, such as bio eod. it is not your everyday go-to. corner cases only, iykyk 😭

💜 SEE ALSO 💜

the whole friend group, all of them, in Kernel file ./block/bio.c:

and that's the whole page, bestie!! 🎀💖✨

this lil beauty lives in ./block and the version/date stamp on it is October 2026 — so mark your calendar, she's from the future and she's iconic for it 🔥👑. bye bestie, go truncate responsibly 🦋💜

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