correct_parent_keys(9)

💅 correct_parent_keys(9) — a Kernel API Manual moment

okay so bestie, welcome to correct_parent_keys(9), straight out of the Kernel API Manual ✨ this one's a lil helper function in UBIFS land and honestly it's giving "quiet background hero" energy 🫶

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🌸 NAME 🌸

correct_parent_keys — it fixes up the keys of parent znodes, no cap 💖

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✨ SYNOPSIS ✨

void correct_parent_keys (const struct ubifs_info *c , struct ubifs_znode *znode );

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🎀 ARGUMENTS 🎀

• c — the UBIFS file-system description object, aka the whole vibe of the fs 🌈
• znode — the znode whose parent znodes we're correcting, the main character of this operation 👑

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💅 DESCRIPTION 💅

so this is a helper function for tnc_insert, periodt ✨ here's the tea: when the key of the leftmost zbranch changes, the keys of the parent znodes have to be corrected too — like, the whole family tree needs a lil glow-up 💖 this helper function gets called in exactly those situations, and it corrects the keys if needed 🦋

ngl it's a "if needed" situation — it doesn't just go rearranging keys for fun, it checks first, and that's iconic of it honestly 🌸

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🔥 SEE ALSO 🔥

the kernel file ./fs/ubifs/tnc.c, and literally the entire friend group 😭💀:

• 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)
• tnc_prev(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)
• 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)

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and that's the whole page bestie, go forth and correct those parent keys 💜 this lil slice of wisdom comes to you from ./fs/ubifs, dated October 2026, and it's filed under correct_parent_keys(9) — mwah, stan 🍓🧚✨