jbd2_journa...ble_features(9)

✨ NAME ✨

welcome to the Kernel API Manual page for jbd2_journa...ble_features(9) 💖 this one is all about jbd2_journal_check_available_features — Check feature set in journalling layer 💅

🌸 SYNOPSIS 🌸

okay bestie, the signature is literally this:

int jbd2_journal_check_available_features (journal_t *journal , unsigned
long compat , unsigned long ro , unsigned long incompat );

🎀 ARGUMENTS 🎀

• journal — Journal to check. 💖
• compat — bitmask of compatible features ✨
• ro — bitmask of features that force read-only mount 🔒
• incompat — bitmask of incompatible features 💀

🦋 DESCRIPTION 🦋

okay so this is the feature-set vibe check ✨ It checks whether the journaling code supports the use of all of a given set of features on this journal — all of them, bestie, no half-credit. And then the page literally says: “Return true” 😭 that’s the whole sentence, no extra lore, periodt.

👑 SEE ALSO 👑

the kernel file in question is ./fs/jbd2/journal.c 🫶 and the related-page squad is: jbd2_journal_force_commit_nested(9), jbd2_journal_force_commit(9), jbd2_journal_shrink_scan(9), jbd2_journal_shrink_count(9), jbd2_journal_init_dev(9), jbd2_journal_init_inode(9), jbd2_journal_update_sb_log_tail(9), jbd2_mark_journal_empty(9), __jbd2_journal_erase(9), jbd2_journal_update_sb_errno(9), jbd2_journal_load(9), jbd2_journal_destroy(9), jbd2_journal_check_used_features(9), jbd2_journal_set_features(9), jbd2_journal_flush(9), jbd2_journal_wipe(9), jbd2_journal_abort(9), jbd2_journal_errno(9), jbd2_journal_clear_err(9), jbd2_journal_ack_err(9).

okay that’s the whole page, ily 🫶 footer tea: source/version ./fs/jbd2, date October 2026, and yep the title again is jbd2_journa...ble_features(9) 💅✨ mwah 💋