leaf_dealloc(9)

💖 NAME 💖

okay so bestie, this page is leaf_dealloc(9) from the Kernel API Manual, and the name is literally Deallocate a directory leaf. That's the whole vibe. ✨

✨ SYNOPSIS ✨

Here's the exact signature, no cap:

int leaf_dealloc (struct gfs2_inode *dip , u32 index , u32 len , u64
leaf_no , struct buffer_head *leaf_bh , int last_dealloc );

🫶 ARGUMENTS 🫶

• dip — the directory. Like, the actual directory we're dealing with, periodt.
• index — the hash table offset in the directory. That's the spot.
• len — the number of pointers to this leaf.
• leaf_no — the leaf number.
• leaf_bh — buffer_head for the starting leaf.
• last_dealloc — literally 1 if this is the final dealloc for the leaf, else 0. iykyk. 🫶

🔥 RETURN 🔥

It returns errno. That's the return value, bestie — no extra lore. 💅

🌈 SEE ALSO 🌈

Kernel file ./fs/gfs2/dir.c is the spot, and then there's this whole friend group: gfs2_dir_write_data(9), gfs2_dir_read_data(9), gfs2_dir_get_hash_table(9), gfs2_dir_hash_inval(9), dirent_next(9), dirent_del(9), get_leaf_nr(9), dir_make_exhash(9), dir_split_leaf(9), dir_double_exhash(9), compare_dents(9), do_filldir_main(9), gfs2_dir_readahead(9), dir_e_read(9), gfs2_dir_search(9), dir_new_leaf(9), gfs2_dir_add(9), gfs2_dir_del(9), gfs2_dir_mvino(9), gfs2_dir_exhash_dealloc(9), and gfs2_diradd_alloc_required(9). Obsessed with this cross-referencing moment. 🦋

That's the tea from ./fs/gfs2, dated October 2026, on page leaf_dealloc(9) — mwah 💋✨