blkg_conf_open_bdev(9)

📦 version 7.3.1, in nixpkgs unstable

💅 blkg_conf_open_bdev(9) — like, the kernel API manual, but make it make sense

okay bestie, so we're in the kernel API manual section today, and this one is a lil function called blkg_conf_open_bdev ✨ she's not famous but she's essential, yk?

🌸 NAME 🌸

blkg_conf_open_bdev — parse and open bdev for per-blkg config update 🎀

✨ SYNOPSIS ✨

int blkg_conf_open_bdev (struct blkg_conf_ctx *ctx );

literally that's it. one function, one pointer, zero drama 💅

🫶 ARGUMENTS 🫶

  • ctx — a blkg_conf_ctx that you already initialized with blkg_conf_init. like, don't come at her with an uninitialized ctx, that's not the vibe 🙈

🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — this function parses the device node prefix part, the MAJ:MIN, of a per-blkg config update. she reads it out of ctx->input, then gets and stores the matching bdev in ctx->bdev. iconic. no cap. 👑

and then, because she's generous, ctx->body gets set to point past the device node prefix. so everything after the MAJ:MIN is just sitting there waiting for you. main character energy fr fr 🌟

💀 RETURN 💀

-errno on error. yeah. that's the whole return section. she's a woman of few words 😭

🦋 SEE ALSO 🦋

Kernel file ./block/blk-cgroup.c — go read the source bestie, it's literally right there 🧚

and she rolls with a whole squad, so let's give them all their flowers 💐:

like, that's the whole group chat. slay 🌈

okay that's the page!! sourced from the Kernel file in ./block, dated October 2026, and yes she's still serving the exact same blkg_conf_open_bdev(9) realness 💖 go forth and parse those device nodes, bestie 🎀✨

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