vbg_core_ioctl(9)

💅 vbg_core_ioctl(9) — the Kernel API Manual, but make it group chat 🎀

okay so bestie, welcome to vbg_core_ioctl ✨ it lives in the Kernel API Manual (section 9, kernel-space royalty 👑) and it's literally the common IOCtl — the one that handles user-to-kernel communication 🫶 so like, the userspace girlies talk, and the kernel listens. iykyk 💜

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✨ NAME ✨

vbg_core_ioctl — the common IOCtl for user ↔ kernel communication 💌 (yes, it's giving matchmaker, but for ioctls 🦋)

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🌸 SYNOPSIS 🌸

int vbg_core_ioctl (struct vbg_session *session , unsigned int req ,
       void *data );

that's the whole vibe check right there, no cap 🔥

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🎀 ARGUMENTS 🎀

• session — the client session 💫 like, the whole context of whoever's knocking on the kernel's door.
• req — the requested function 🌈 the actual "hey can you do this for me" of it all.
• data — the i/o data buffer 🍓 minimum size sizeof(struct vbg_ioctl_hdr). don't skimp on the buffer, bestie, that's the floor, not a suggestion 🙈

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⭐ RETURN ⭐

0 or a negative errno value 💀 so either it slayed or it didn't — zero is the win, negative is the "we need to talk" 😭

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🦋 SEE ALSO 🦋

the kernel file where all the magic lives, literally the main character:

• Kernel file ./drivers/virt/vboxguest/vboxguest_core.c

and the whole friend group 🫶 (go read these too, they're iconic):

• vbg_guest_mappings_init(9), vbg_guest_mappings_exit(9)
• vbg_report_guest_info(9), vbg_report_driver_status(9)
• vbg_balloon_inflate(9), vbg_balloon_deflate(9)
• vbg_heartbeat_host_config(9), vbg_heartbeat_init(9), vbg_heartbeat_exit(9)
• vbg_track_bit_usage(9)
• vbg_reset_host_event_filter(9), vbg_set_session_event_filter(9)
• vbg_reset_host_capabilities(9), vbg_set_host_capabilities(9)
• vbg_acquire_session_capabilities(9), vbg_set_session_capabilities(9)
• vbg_query_host_version(9)
• vbg_core_init(9), vbg_core_exit(9)
• vbg_core_open_session(9), vbg_core_close_session(9)
• vbg_req_allowed(9)
• vbg_core_set_mouse_status(9)

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ok real talk bestie — every one of those refs is a real page in section 9, and the source of truth is ./drivers/virt/vboxguest/vboxguest_core.c. read the code, she never lies 💅

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and that's the page!! 💖 it comes from ./drivers/virt/vboxguest, dated October 2026, and it's filed under vbg_core_ioctl(9) — so like, cite her correctly when you quote her, periodt 👑✨