VDODEBUGMETADATA(8)

📦 version 8.3.2.1, in centos-stream 10, centos-stream 9, debian trixie, fedora 43, fedora 44, nixos 26.05, nixpkgs unstable, ubuntu questing, ubuntu resolute, ubuntu stonking

💖 VDODEBUGMETADATA 💖

okay bestie, welcome to vdodebugmetadata — the System Manager's Manual entry, section 8, and it's literally the tool that loads a metadata dump of a VDO device. yeah. we're doing forensics today. 🕵️♀️✨

✨ NAME ✨

vdodebugmetadata — load a metadata dump of a VDO device. that's it, that's the whole job. no cap. 💅

🌸 SYNOPSIS 🌸

vdodebugmetadata [--pbn=pbn ...] [--searchLBN=lbn ...] filename

look at her. filename goes at the end, the flags go before it, and yes you can stack up --pbn and --searchLBN like little collectibles. 🎀

🦋 DESCRIPTION 🦋

so vdodebugmetadata loads up the metadata regions that were dumped by vdodumpmetadata. it's giving "reopen the crime scene" energy fr fr.

bestie pls listen: you're supposed to run this under GDB, with a breakpoint on the function doNothing. yes, doNothing. iconic name, honestly. that's your little pause button so you can go snooping around in memory. 🫶

once you're in there, these variables are available to you:

  • vdo — access to the VDO super block state 👑
  • slabSummary — access to the slab summary blocks ✨
  • slabs — access to all slab journal and reference blocks per slab 🌈
  • recoveryJournal — access to all recovery journal blocks 📓
⚠️ important heads up: this tool does not provide access to block map pages. like, at all. don't go looking, they're not there. 😭

💅 OPTIONS 💅

  • --pbn — print the slab journal entries for the given PBN. and the way that you can specify this option up to 255 times?? obsessed. 🍓
  • --searchLBN — print the recovery journal entries for the given LBN. and it does not hold back, it gives you: PBN, increment/decrement, mapping state, recovery journal position information, and whether the recovery journal block is valid. so much info, she ate. 💜 this one may also be specified up to 255 times. 🔥

👑 SEE ALSO 👑

go read those too, bestie, they're the rest of the lore. 📚✨

and that's the whole page, no crumbs left. this one came to you from Red Hat, dated 2020-05-08, in the System Manager's Manual, section 8 — VDODEBUGMETADATA(8). periodt. 💖🦋🌸

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