virtqueue_detach_unused_buf(9)

📦 version 7.3.1, in nixpkgs unstable

🦋 virtqueue_detach_unused_buf(9) — kernel API energy 🦋

okay so bestie, welcome to the manual page for virtqueue_detach_unused_buf, straight out of the Kernel API Manual (section 9, kernel developer era 💅). this is a little function with a big job and she's about to explain herself, so grab a snack 🍓

✨ NAME ✨

virtqueue_detach_unused_buf — detach first unused buffer 🎀

like, she pops off the first buffer that nobody's touched yet. no cap.

🌸 SYNOPSIS 🌸

void * virtqueue_detach_unused_buf (struct virtqueue *_vq );

yes she returns a void * and yes she takes exactly one thing. main character signature honestly 👑

🫶 ARGUMENTS 🫶

  • _vq — the struct virtqueue we're talking about. that's the one. the queue in question. the vibe we're checking 💖

🔥 DESCRIPTION 🔥

so here's the tea ☕ — this function returns either NULL or the "data" token that you handed over to virtqueue_add_*(). like it's giving your stuff back. giving it back to you. iconic behavior honestly.

⚠️ but listen — this is not valid on an active queue. nope. not a thing. do not try it. it is useful for device shutdown or the reset queue, which is where she actually slays. read the room bestie 💀

🌈 SEE ALSO 🌈

so you wanna go down the rabbit hole? say less, here's the whole friend group and also the kernel file they all live in:

Kernel file ./drivers/virtio/virtio_ring.c, plus literally all of these:

and that's the whole page bestie, go forth and detach responsibly 🧚💜

signing off from ./drivers/virtio, dated October 2026, page virtqueue_detach_unused_buf(9) — mwah 💋✨

📦 where this page comes from