vringh_iov_pull_user(9)

💖 vringh_iov_pull_user 💖

okay bestie, so you know how this page lives in the Kernel API Manual? yeah. that's the world we're in. kernel-land. grab your iced coffee 🧊☕ because this one's short and sweet and honestly iconic of it.

✨ NAME ✨

vringh_iov_pull_user — copy bytes from vring_iov. that's the whole vibe. it copies bytes. from the vring iov. slay 🎀

🌸 SYNOPSIS 🌸

ssize_t vringh_iov_pull_user (struct vringh_iov *riov , void *dst ,
       size_t len );

🦋 ARGUMENTS 🦋

• riov — the riov as passed to vringh_getdesc_user (updated as we consume). like, it changes as it goes, bestie — this thing is not read-only, it's giving main character energy and it mutates 💅
• dst — the place to copy. where the bytes land. that's the spot. the destination. the moment.
• len — the maximum length to copy. maximum, ok? not a promise, a ceiling. respect the ceiling 🙏

💜 DESCRIPTION 💜

Returns the bytes copied <= len or a negative errno. that's it. that's the whole function. it gives you a number back — either a happy little count that is less than or equal to len, or a negative errno that says nope 😭

ngl, keep an eye on that return value — negative means things went sideways, and errno is the one telling you why 🫶

🔥 SEE ALSO 🔥

Kernel file ./drivers/vhost/vringh.c — go read it, iykyk ✨

and the whole friend group, in this exact order because we're not doing chaos today:

vringh_kiov_advance(9), vringh_init_user(9), vringh_getdesc_user(9), vringh_iov_push_user(9), vringh_complete_user(9), vringh_complete_multi_user(9), vringh_notify_enable_user(9), vringh_notify_disable_user(9), vringh_need_notify_user(9), vringh_init_kern(9), vringh_getdesc_kern(9), vringh_complete_kern(9), vringh_notify_enable_kern(9), vringh_notify_disable_kern(9), vringh_need_notify_kern(9), vringh_init_iotlb(9), vringh_init_iotlb_va(9), vringh_set_iotlb(9), vringh_getdesc_iotlb(9), vringh_iov_pull_iotlb(9), vringh_iov_push_iotlb(9), vringh_complete_iotlb(9), vringh_need_notify_iotlb(9)

mwah 💋 that's the page! it comes from ./drivers/vhost, dated October 2026, and it's filed under vringh_iov_pull_user(9) — go forth and copy those bytes, bestie, you're literally gonna ate it 👑💖