tee_session_..._client_uuid(9)

💅 tee_session_..._client_uuid(9) — Kernel API Manual, bestie edition 🎀

okay so this one's from the Kernel API Manual (tee_session_..._client_uuid(9), yes the name is a whole mood and yes it's literally abbreviated like that, iykyk) and it's genuinely so cute once you get it. sit down, grab a lil snack 🍓

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✨ NAME ✨

tee_session_calc_client_uuid — calculates the client UUID for a session. that's it, that's the whole job, and she ate 💅

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🌸 SYNOPSIS 🌸

int tee_session_calc_client_uuid (uuid_t *uuid , u32 connection_method ,
const u8 connection_data[TEE_IOCTL_UUID_LEN] );

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🦋 ARGUMENTS 🦋

• uuid — the resulting UUID goes here 🫶 this is the output, the main character of the whole call
• connection_method — the connection method for the session, and it's one of the TEE_IOCTL_LOGIN_* crew ✨
• connection_data — the connection data used for opening the session; it's a const u8 array of TEE_IOCTL_UUID_LEN length, no cap

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💖 DESCRIPTION 💖

so based on the connection method, it calculates a UUIDv5-based client UUID. literally that's the vibe — method goes in, UUIDv5 comes out 🧚

and for group based logins, it also verifies that the calling process actually has the specified credentials. like, it's doing a lil vibe check on your credentials before letting you through the door 👑 no credentials, no entry, periodt.

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⭐ RETURN ⭐

• < 0 on failure 💀

(that's the whole return section, she's minimal, she's efficient, she doesn't waste your time)

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🔥 SEE ALSO 🔥

the whole friend group, honestly. Kernel file ./include/linux/tee_core.h and then:

• struct tee_device(9)
• struct tee_driver_ops(9)
• struct tee_desc(9)
• struct tee_protmem_pool(9)
• struct tee_protmem_pool_ops(9)
• tee_device_alloc(9)
• tee_device_register(9)
• tee_device_unregister(9)
• tee_device_get(9)
• tee_device_put(9)
• tee_device_set_dev_groups(9)
• struct tee_shm_pool(9)
• struct tee_shm_pool_ops(9)
• tee_shm_pool_free(9)
• tee_protmem_static_pool_alloc(9)
• tee_get_drvdata(9)
• tee_shm_alloc_priv_buf(9)
• tee_shm_is_dynamic(9)
• tee_shm_put(9)
• tee_shm_get_id(9)
• tee_shm_get_from_id(9)
• teedev_open(9)
• teedev_close_context(9)
• teedev_ctx_get(9)
• teedev_ctx_put(9)

like I said. the whole group chat 🫶

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lowkey a reminder bestie: this page lives in ./include/linux, it's the October 2026 edition, and the manual tag is tee_session_..._client_uuid(9) — so when you cite her, cite her right 💜

okay that's the whole page, go forth and calculate those UUIDs, mwah 💋🌸