dbg_check_tnc(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dbg_check_tnc(9) — like, the TNC tree inspector bestie

okay so this is a page from the Kernel API Manual, and it's all about dbg_check_tnc — a UBIFS debugging function that walks the whole TNC tree and checks every single znode. yes bestie, the whole tree. no skipping. 🧚✨

✨ SYNOPSIS ✨

int dbg_check_tnc (struct ubifs_info *c , int extra );

that's the whole signature, she's short and she knows it 💅

🎀 ARGUMENTS 🎀

  • c — the UBIFS file-system description object. your file system, basically, in struct form 🌸
  • extra — do extra checks that are possible at start commit. like the deluxe version of the check, more effort, more scrutiny 🔥

🦋 DESCRIPTION 🦋

so what she does is: this function traverses the whole TNC tree 🌈 and checks every znode along the way. every. single. one. no cap.

what does she return? glad you asked:

  • returns zero if everything is all right — slay, we love a clean bill of health 👑
  • returns -EINVAL if something is wrong with TNC — not slay, something is off and she's telling you about it 😭
fr fr, if you get -EINVAL back it means the TNC has a problem. don't ignore it. that's the whole point of the check 💀

💜 SEE ALSO 💜

here's the whole friend group — the kernel file ./fs/ubifs/debug.c plus everyone tagged below 🫶

and that's the page!! 🎀💖 this one lives in ./fs/ubifs and it's dated October 2026 — so go forth, check that tree, get your zero, and stan a clean TNC ✨🦋🍓

📦 where this page comes from