jbd2_journal_errno(9)

📦 version 7.3.1, in nixpkgs unstable

💖 jbd2_journal_errno(9) 💖

okay bestie, so this is a page straight out of the Kernel API Manual 🧚 and it's all about peeking at a journal's error state. tiny function, big feelings. let's get into it ✨

🌸 SYNOPSIS 🌸

int jbd2_journal_errno (journal_t *journal );

🎀 ARGUMENTS 🎀

  • journal — the journal you wanna examine 👀 that's it, that's the whole argument, she's lowkey simple like that.

🦋 DESCRIPTION 🦋

so here's the tea ☕ — what you get back is the errno number that got set with jbd2_journal_abort, like, the last time the journal was mounted. if the journal was stopped without anybody calling abort, then this bad boy is just 0 (no drama, no errors, we love a peaceful queen 👑).

but wait, there's more 🫶 — if the journal has been aborted on this mount time, you get -EROFS back. it's giving "read-only, bestie, don't even try it" 🔥 ngl that's the whole vibe check right there.

fr fr, keep those two cases straight: 0 = stopped all clean, -EROFS = aborted during this mount. both are real, both matter 💅

⭐ SEE ALSO ⭐

first up, the source itself: Kernel file ./fs/jbd2/journal.c 📄 and then the whole friend group 😭 — the squad of related calls:

go read those next, bestie, they're the main characters of this whole saga 💜

aaaand that's a wrap on this one 🎬💖 tysm for reading, catch you in the next manpage — this lil beauty lives in <pink>./fs/jbd2</pink> and it's dated October 2026 so mark your calendar bestie 🎀🦋 slay! ✨

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