devt_from_partuuid(9)

💅 devt_from_partuuid — Kernel API Manual (section 9)

Okay bestie, welcome to the Kernel API Manual, section 9. This is the page for devt_from_partuuid(9) — the little lookup bestie that finds a partition’s dev_t by its UUID. No cap, let’s get into it. 🦋

✨ NAME ✨

devt_from_partuuid — looks up the dev_t of a partition by its UUID. 💖

🌸 SYNOPSIS 🌸

int devt_from_partuuid (const char *uuid_str , dev_t *devt );

🎀 ARGUMENTS 🎀

• uuid_str — char array containing ascii UUID. 🧚
• devt — dev_t result. 💫

🦋 DESCRIPTION 🦋

Okay so here’s the tea: the function will return the first partition which contains a matching UUID value in its partition_meta_info struct. 💅 And bestie, note this: it does not search by filesystem UUIDs. 🙈

If uuid_str is followed by a /PARTNROFF=d, then the number will be extracted and used as an offset from the partition identified by the UUID. 🎯

Returns 0 on success or a negative error code on failure. Periodt. ✨

🔥 SEE ALSO 🔥

• Kernel file ./block/early-lookup.c: match_dev_by_uuid(9), match_dev_by_label(9) 👑

xoxo, bestie 💖 this page’s source/version is ./block, dated October 2026, and it’s devt_from_partuuid(9) — slay and read responsibly. 🫶