nd_is_uuid_unique(9)

✨ NAME ✨

Okay so this is nd_is_uuid_unique(9), straight outta the Kernel API Manual, and its whole gig is to verify that no other namespace has @uuid. That’s the mission. Iconic, honestly. 💅

✨ SYNOPSIS ✨

bool nd_is_uuid_unique (struct device *dev , uuid_t *uuid );

🌸 ARGUMENTS 🌸

• dev — any device on a nvdimm_bus. Not a specific one, bestie — just any device chillin’ on that bus. 🚌
• uuid — the uuid to check. That’s the one getting the vibe check. 🔍

💖 RETURN 💖

It gives you true if the uuid is unique, and false if not. No in-between, no maybes, no “it’s complicated.” 🫶

🦋 SEE ALSO 🦋

• Kernel file ./drivers/nvdimm/namespace_devs.c
• shrink_dpa_allocation(9)
• space_valid(9)
• grow_dpa_allocation(9)
• namespace_update_uuid(9)
• create_namespace_pmem(9)

That’s the whole lore drop, bestie. Big shoutout to the ./drivers/nvdimm source and the October 2026 date for sponsoring this episode. Mwah 💋🎀