mei_ioctl_connect_client(9)

💅 mei_ioctl_connect_client(9) — the Kernel API Manual page you didn't know you needed

okay so bestie, welcome to the Kernel API Manual entry for mei_ioctl_connect_client. yes that's a mouthful, no we're not renaming it, and yes it's literally the function that handles the "connect to fw client" IOCTL. let's get into it 🎀

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✨ NAME ✨

mei_ioctl_connect_client — the connect to fw client IOCTL function, periodt 💅

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🌸 SYNOPSIS 🌸

int mei_ioctl_connect_client (struct file *file , const uuid_le
*in_client_uuid , struct mei_client *client );

that's the whole signature, character for character, no cap 🫶

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🦋 ARGUMENTS 🦋

• file — the private data of the file object. like, its whole little personality 🪪
• in_client_uuid — the requested UUID for connection. yes it's a const uuid_le *, yes you give it the uuid you want, slay ✨
• client — the IOCTL connect data, and these are output parameters. so it's giving "you hand me the box, I fill the box" energy 📦

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🔥 DESCRIPTION 🔥

okay so the actual description here is short but important, so listen up:

Locking: this is called under "dev->device_lock" lock. fr fr, that's the vibe check — respect the lock, iykyk 🔒👑

that's literally the whole description and honestly? iconic minimalism 💀

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⭐ RETURN ⭐

• 0 on success 🎉
• <0 on failure 😭

yes that's it, that's the whole return contract, don't overthink it 💜

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🌈 SEE ALSO 🌈

grab a snack, this list is long and every single one of these is invited to the party 🎊

• Kernel file ./drivers/misc/mei/main.c
• mei_open(9)
• mei_cl_vtag_remove_by_fp(9)
• mei_release(9)
• mei_read(9)
• mei_cl_vtag_by_fp(9)
• mei_write(9)
• mei_vt_support_check(9)
• mei_ioctl_connect_vtag(9)
• mei_ioctl_client_notify_request(9)
• mei_ioctl_client_notify_get(9)
• mei_ioctl(9)
• mei_poll(9)
• mei_cl_is_write_queued(9)
• mei_fsync(9)
• mei_fasync(9)
• trc_show(9)
• fw_status_show(9)
• hbm_ver_show(9)
• hbm_ver_drv_show(9)
• fw_ver_show(9)
• dev_state_show(9)
• mei_set_devstate(9)
• kind_show(9)
• mei_minor_get(9)
• mei_minor_free(9)

bestie reminder: this page lives in ./drivers/misc/mei, so if you're lost, that's your home base 🏠

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and that's the page!! mwah, go read the other ones too 💋 this lil manual entry came from ./drivers/misc/mei and is dated October 2026 — so mark your calendar, screenshot it, send it to the group chat, mei_ioctl_connect_client(9) says hi and she ate 🍓👑💖