vringh_init_user(9)

📦 version 7.3.1, in nixpkgs unstable

✨ vringh_init_user(9) ✨

okay so this is a page from the Kernel API Manual, bestie — buckle up 💖

🌸 NAME 🌸

vringh_init_user — initialize a vringh for a userspace vring. that's it, that's the whole vibe 🎀

🦋 SYNOPSIS 🦋

int vringh_init_user (struct vringh *vrh , u64 features , unsigned int
num , bool weak_barriers , vring_desc_t __user *desc , vring_avail_t
__user *avail , vring_used_t __user *used );

like, yes, it's long. no cap, that's just how she is 💅

👑 ARGUMENTS 👑

  • vrh — the vringh you're initializing, bestie. this is the main character we're setting up 🫶
  • features — the feature bits for this ring. the whole personality, honestly.
  • num — the number of elements. and yes, it has to be valid — more on that below 👀
  • weak_barriers — true if we only need memory barriers, not I/O. lowkey a big deal.
  • desc — the userspace descriptor pointer.
  • avail — the userspace avail pointer.
  • used — the userspace used pointer.

💜 DESCRIPTION 💜

So here's the tea: it returns an error if num is invalid. that's the whole check, fr fr.

you should check pointers yourself! 😭 Like, literally. This function is NOT doing that for you. That's a you problem, bestie. Not me doing your pointer validation for you. Please. 🙈

So: valid num, or you get an error. Pointers? Your job. Periodt. 💅

⭐ SEE ALSO ⭐

the Kernel file ./drivers/vhost/vringh.c — go read her, she ate 🔥

And the whole friend group of related calls, no one left out 💖:

mwah 💋 this page lives in ./drivers/vhost, and it's dated October 2026 — so she's from the future, iconic behavior honestly ⭐🦋💜

📦 where this page comes from