is_dx_dir(9)

✨ NAME ✨

okay so this is is_dx_dir(9), straight outta the Kernel API Manual, and it literally checks if a directory is using htree indexing 💅

🎀 SYNOPSIS 🎀

int is_dx_dir (struct inode *inode );

🌸 ARGUMENTS 🌸

• inode — the directory inode, aka the dir-inode we're vibe-checking 🫶

💅 DESCRIPTION 💅

So here's the tea: this checks whether the given dir-inode refers to an htree-indexed directory — or a directory which could potentially get converted to use htree indexing 🌈✨

It returns 1 if it is a dx dir, and 0 if not. periodt 💖

🦋 SEE ALSO 🦋

• Kernel file ./fs/ext4/dir.c — go read it, iykyk 📖✨

signed, sealed, delivered by ./fs/ext4, dated October 2026, page is_dx_dir(9) — mwah 💋🎀