tnc_prev(9)

🌸 NAME 🌸

okay so bestie, this is tnc_prev(9) from the Kernel API Manual 💖 and the name is literally right there: tnc_prev — find previous TNC entry. That's the whole name vibe. No cap, every detail stays.

✨ SYNOPSIS ✨

int tnc_prev (struct ubifs_info *c , struct ubifs_znode **zn , int *n );

🎀 ARGUMENTS 🎀

• c — UBIFS file-system description object. iconic little context object, honestly.
• zn — znode is returned here. yes, it gets handed back through this pointer 💅
• n — znode branch slot number is passed and returned here. in-and-out, main character behavior.

🦋 DESCRIPTION 🦋

This function returns 0 if the previous TNC entry is found, -ENOENT if there is no next entry, or a negative error code otherwise. That's the exact fact set, bestie — and yes, the wording says “no next entry,” so we are keeping that wording. No edits from me, periodt.

👑 SEE ALSO 👑

Kernel file: ./fs/ubifs/tnc.c. The whole cross-reference squad, exactly as listed:

• insert_old_idx(9), insert_old_idx_znode(9), ins_clr_old_idx_znode(9), destroy_old_idx(9), copy_znode(9), add_idx_dirt(9), replace_znode(9), dirty_cow_znode(9)
• lnc_add(9), lnc_free(9), tnc_read_hashed_node(9), try_read_node(9), fallible_read_node(9), matches_name(9), get_znode(9), tnc_next(9)
• resolve_collision(9), fallible_matches_name(9), fallible_resolve_collision(9), matches_position(9), resolve_collision_directly(9), dirty_cow_bottom_up(9), ubifs_lookup_level0(9), lookup_level0_dirty(9)
• maybe_leb_gced(9), ubifs_tnc_locate(9), ubifs_tnc_get_bu_keys(9), read_wbuf(9), validate_data_node(9), ubifs_tnc_bulk_read(9), do_lookup_nm(9), ubifs_tnc_lookup_nm(9)
• ubifs_tnc_lookup_dh(9), correct_parent_keys(9), insert_zbranch(9), tnc_insert(9), ubifs_tnc_add(9), ubifs_tnc_replace(9), ubifs_tnc_add_nm(9), tnc_delete(9)
• ubifs_tnc_remove(9), ubifs_tnc_remove_nm(9), ubifs_tnc_remove_dh(9), key_in_range(9), ubifs_tnc_remove_range(9), ubifs_tnc_remove_ino(9), ubifs_tnc_next_ent(9), tnc_destroy_cnext(9)
• ubifs_tnc_close(9), left_znode(9), right_znode(9), lookup_znode(9), is_idx_node_in_tnc(9), is_leaf_node_in_tnc(9), ubifs_tnc_has_node(9), ubifs_dirty_idx_node(9)
• dbg_check_inode_size(9)

— with love from the Kernel API Manual girlies, source ./fs/ubifs, date October 2026 🫶💖