nd_btt_arena_is_valid(9)

📦 version 7.3.1, in nixpkgs unstable

hiii bestie 💖 welcome to nd_btt_arena_is_valid(9) — yes, the manual name is right there, no cap. This is the little kernel API page that does a vibe check on the metadata layout. Let’s go 🫶

💖 NAME 💖

nd_btt_arena_is_valid — check if the metadata layout is valid ✨

✨ SYNOPSIS ✨

bool nd_btt_arena_is_valid (struct nd_btt *nd_btt , struct btt_sb *super );

🎀 ARGUMENTS 🎀

  • nd_btt — the device with BTT geometry and backing device info. It’s giving “I know where things live” 💅
  • super — pointer to the arena’s info block being tested. This is the lil block under the microscope 🔍

🦋 DESCRIPTION 🦋

Okay so this function checks consistency of the btt info block with itself by validating the checksum ✅. It also checks consistency with the parent namespace by verifying the parent_uuid contained in the info block against the one supplied in 🧚. That’s the whole mission: is this layout valid or not, bestie?

💅 RETURN 💅

  • false for an invalid info block 🙈
  • true for a valid one 👑

🌸 SEE ALSO 🌸

  • Kernel file ./drivers/nvdimm/btt_devs.c — go peek if you want the source side of the story 📂✨

With so much love from the source/version ./drivers/nvdimm, dated October 2026 — mwah 💋💅🫶

📦 where this page comes from