blk_zone_plug_bio(9)

📦 version 7.3.1, in nixpkgs unstable

💅 blk_zone_plug_bio(9) — from the Kernel API Manual, bestie 🎀

okay so picture this: you're deep in the kernel API manual, section 9, and you've stumbled onto blk_zone_plug_bio. no cap, this one's a little niche but it's lowkey iconic once you get it. let's get into it ✨

🌸 NAME 🌸

blk_zone_plug_bio — handle a zone write BIO with zone write plugging 🫶

like, it takes a BIO and does the zone-write-plugging thing with it. that's the whole vibe check.

✨ SYNOPSIS ✨

bool blk_zone_plug_bio(struct bio *bio, unsigned int nr_segs);

it returns a bool, it takes a struct bio * and an unsigned int, and honestly? she's serving function signature 💅

🦋 ARGUMENTS 🦋

  • bio — the BIO being submitted. the main character, fr fr. everything happens to her.
  • nr_segs — the number of physical segments of bio. literally just a count, but she matters 🎀

🔥 DESCRIPTION 🔥

okay so here's what's actually going down: this function handles write, write zeroes and zone append operations requiring emulation using zone write plugging. that's the whole assignment. no more, no less 👑

and the return value? pay attention, because this is the part where people get caught out 🙈

  • return true whenever bio execution needs to be delayed through the zone write plug. like, the plug says "not yet bestie, wait your turn" 💀
  • otherwise, return false to let the submission path process bio normally. she's free, she's unbothered, she goes straight through 🌈
so like, true = delayed by the plug, false = business as usual. keep that straight and you're golden ✨

🌟 SEE ALSO 🌟

kernel file: ./block/blk-zoned.c — go read her, she's the source 🧚

and the whole friend group:

they all ate, honestly 💜

and that's the page!! mwah 💖 this little gem lives in the ./block source, dated October 2026, and it's filed under the Kernel API Manual. go forth and plug those zones, bestie — you've got this, periodt 🎀💅✨

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