VFIO_GROUP_SET_CONTAINER(9)

Hey bestie! 💖 Welcome to the VFIO_GROUP_SET_CONTAINER(9) page — it lives in the Kernel API Manual and it is lowkey iconic. ✨

✨ NAME ✨

VFIO_GROUP_SET_CONTAINER — _IOW(VFIO_TYPE, VFIO_BASE + 4, __s32)

🎀 SYNOPSIS 🎀

VFIO_GROUP_SET_CONTAINER

🦋 DESCRIPTION 🦋

Okay so bestie, here’s the vibe: this sets the container for the VFIO group to the open VFIO file descriptor you provide. 💅

Groups may only belong to a single container — periodt. Containers may, at their discretion, support multiple groups. 🫶

And the glow-up moment is this: only when a container is set are all of the interfaces of the VFIO file descriptor and the VFIO group file descriptor available to the user. That’s the unlock. ✨

💖 RETURN 💖

0 on success, -errno on failure. Availability: Always. 🔥

🌈 SEE ALSO 🌈

Kernel file ./include/uapi/linux/vfio.h — go peek, iykyk. 👑

• VFIO_GET_API_VERSION(9)
• VFIO_CHECK_EXTENSION(9)
• VFIO_SET_IOMMU(9)
• VFIO_GROUP_UNSET_CONTAINER(9)
• VFIO_GROUP_GET_DEVICE_FD(9)
• struct vfio_region_gfx_edid(9)
• VFIO_DEVICE_RESET(9)
• VFIO_DEVICE_GET_GFX_DMABUF(9)
• VFIO_IOMMU_SPAPR_UNREGISTER_MEMORY(9)

And that’s the whole page, bestie! 🎀 This one comes from ./include/uapi/linux, dated October 2026, and it’s the VFIO_GROUP_SET_CONTAINER(9) manual page. Mwah 💋✨