vringh_iov_pull_iotlb(9)

💖 vringh_iov_pull_iotlb — the Kernel API Manual, bestie edition ✨

Okay so picture this: we're deep in the Kernel API Manual and the function of the day is vringh_iov_pull_iotlb, which is, and I cannot stress this enough, the "copy bytes from vring_iov" girlie. That's the whole vibe. Let's get into it 💅

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🌸 NAME 🌸

vringh_iov_pull_iotlb — copy bytes from vring_iov. That's it, that's the job, and she does it flawlessly. No cap 🫶

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✨ SYNOPSIS ✨

ssize_t vringh_iov_pull_iotlb (struct vringh *vrh , struct vringh_kiov
*riov , void *dst , size_t len );

Literally the whole signature, exactly like that, don't come for me about the spacing, that's how the manpage gives it 🎀

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🦋 ARGUMENTS 🦋

• vrh — the vring. The main character. The whole reason we're here, lowkey 👑
• riov — the riov as passed to vringh_getdesc_iotlb (and heads up bestie, it gets updated as we consume — she's not staying the same, she's evolving 🙈)
• dst — the place to copy. Where all the bytes get to live ✨
• len — the maximum length to copy. The ceiling. The limit. The "no ma'am, not one byte more" 💀

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💜 DESCRIPTION 💜

So what does it actually do? It returns the bytes copied, and that number is <= len, or it hands you back a negative errno if things went sideways. That's the whole story and honestly? Iconic. ⭐

Ngl, if you get a negative errno back, that's your sign: something went wrong, and the return value is negative on purpose. Don't try to read it as a byte count, that's not the vibe check it's giving 😭

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🌈 SEE ALSO 🌈

Strap in, because this list is a whole friend group and everyone's invited 🎀

• Kernel file ./drivers/vhost/vringh.c — the source of truth, go read her 💖
• vringh_kiov_advance(9)
• vringh_init_user(9)
• vringh_getdesc_user(9)
• vringh_iov_pull_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_push_iotlb(9)
• vringh_complete_iotlb(9)
• vringh_need_notify_iotlb(9)

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🍓 THE CUTE SIGN-OFF 🍓

This page is brought to you by ./drivers/vhost, dated October 2026, filed under vringh_iov_pull_iotlb(9). Go forth and copy those bytes, bestie — you're gonna slay 💅💖🧚