get_log_header(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

Okay so this is get_log_header, from the Kernel API Manual — the function that reads the log header for a given segment. Main character energy for journal recovery, honestly. 💅

✨ SYNOPSIS ✨

int get_log_header (struct gfs2_jdesc *jd , unsigned int blk , struct
       gfs2_log_header_host *head );

🎀 ARGUMENTS 🎀

  • jd — the journal. Like, the actual journal we're looking at, bestie.
  • blk — the block to look at. Eyes on the prize. 👀
  • head — the log header to return. This is where the header goes when we're done.

💅 DESCRIPTION 💅

So this reads the log header for a given segment in a given journal, and then it does a few sanity checks on it. That's the vibe: read the header, check that it's not giving chaos, move on. 🦋

🔥 RETURN 🔥

  • 0 on success — slay. ✅
  • 1 if the header was invalid or incomplete — not slay, but very important info. 💀
  • errno on error — classic errno behavior, no cap.

🌈 SEE ALSO 🌈

Kernel file ./fs/gfs2/recovery.c — go look, iykyk. Also:

Mwah 💋 signing off from ./fs/gfs2, October 2026, with all the get_log_header(9) energy. 🫶✨

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