STRUCT VDUSE_VQ_STATE_PACKED(9)

🦋 struct vduse_vq_state_packed(9) — Kernel API Manual 🦋

okay bestie, so this page is literally called struct vduse_vq_state_packed(9) and it lives in the Kernel API Manual, and it's giving "packed virtqueue state" and nothing else — she's focused, she's minimal, she's an icon 💅

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✨ NAME ✨

struct vduse_vq_state_packed — packed virtqueue state, no cap 🎀

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✨ SYNOPSIS ✨

struct vduse_vq_state_packed {
    __u16 last_avail_counter;
    __u16 last_avail_idx;
    __u16 last_used_counter;
    __u16 last_used_idx;
 };

that's the whole struct, she's four __u16s and a dream 🫶

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✨ Members ✨

• last_avail_counter — the last driver ring wrap counter that the device has observed 👀 like that's the number the device saw, periodt.
• last_avail_idx — the device available index, fr fr.
• last_used_counter — the device ring wrap counter 🌸 that one's the device's own.
• last_used_idx — the used index, and yes it's literally just called "used index" 😭 she keeps it simple.

ngl these four are the whole personality of the struct — counter/idx for avail, counter/idx for used 💖

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🌈 SEE ALSO 🌈

Kernel file ./include/uapi/linux/vduse.h — and honestly the whole friend group shows up here, so let's list the squad, no skipping, we love a complete roster 👑

• struct vduse_dev_config(9)
• struct vduse_iotlb_entry(9)
• struct vduse_config_data(9)
• struct vduse_vq_config(9)
• struct vduse_vq_state_split(9)
• struct vduse_vq_group_asid(9)
• struct vduse_vq_info(9)
• struct vduse_vq_eventfd(9)
• struct vduse_iova_umem(9)
• struct vduse_iova_info(9)
• struct vduse_iotlb_entry_v2(9)
• enum vduse_req_type(9)
• struct vduse_vq_state(9)
• struct vduse_dev_status(9)
• struct vduse_iova_range(9)
• struct vduse_iova_range_v2(9)
• struct vduse_vq_ready(9)
• struct vduse_dev_request(9)
• struct vduse_dev_response(9)

like, that's the entire vduse extended universe and struct vduse_vq_state_split(9) is literally her sibling — the split one vs the packed one, sibling rivalry but make it kernel 💀

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and that's the page!! 🌟 this one comes to you from ./include/uapi/linux, dated October 2026, under the very long and very dramatic title struct vduse...state_packed(9) — mwah, bye bestie 💜🧚‍♀️