jbd2_journal_set_features(9)

📦 version 7.3.1, in nixpkgs unstable

💫 jbd2_journal_set_features(9) 💫

okay so bestie, welcome to the kernel API manual ✨ today's main character is jbd2_journal_set_features — and yes she lives in the Kernel API Manual, that's her whole address, iykyk 🎀

🌸 NAME 🌸

jbd2_journal_set_features — bestie, this one literally marks a given journal feature in the superblock 💅

✨ SYNOPSIS ✨

int jbd2_journal_set_features (journal_t *journal , unsigned long compat , unsigned long ro , unsigned long incompat );

like, that's the whole summoning circle 🕯️ no cap

🫶 ARGUMENTS 🫶

  • journal — the journal we're acting on, aka the girl we're doing all this for 👑
  • compat — a bitmask of compatible features, so they're the chill, low-stakes ones 🌈
  • ro — a bitmask of features that force a read-only mount, so yeah, these ones are giving consequences 😭
  • incompat — a bitmask of incompatible features, and the name is literally right there bestie 💀

🦋 DESCRIPTION 🦋

So what she does is mark a given journal feature as present on the superblock ✨ that's it, that's the vibe.

She returns true if the requested features could be set 💖 like, she'll tell you honestly whether it worked out. no cap, no games.

🔥 SEE ALSO 🔥

Kernel file ./fs/jbd2/journal.c — go read her, she's iconic 🧚

mwah 💋 that's the whole page! this little gem comes from ./fs/jbd2, dated October 2026 — so go be the main character of your own filesystem, slay 🦋💜⭐

periodt. 💅

📦 where this page comes from