replace_cats(9)

✨ replace_cats(9) ✨

okay bestie, this is the Kernel API Manual corner of the group chat, and today's main character is replace_cats(9). she's lowkey iconic and highkey here to do one very specific job. it's giving very specific kernel energy 🫶

🎀 NAME 🎀

replace_cats — add LEB properties of a pnode to LEB category lists and heaps. no cap, that's the whole vibe 💅

🦋 SYNOPSIS 🦋

void replace_cats (struct ubifs_info *c , struct ubifs_pnode *old_pnode , struct ubifs_pnode *new_pnode );

💖 ARGUMENTS 💖

• c — UBIFS file-system description object
• old_pnode — pnode copied
• new_pnode — pnode copy

🔥 DESCRIPTION 🔥

okay so during commit, it is sometimes necessary to copy a pnode — see dirty_cow_pnode for that whole situation. when that happens, references in category lists and heaps must be replaced. this function does that. periodt. and honestly? she slays this exact task, iykyk ✨

👑 SEE ALSO 👑

Kernel file ./fs/ubifs/lpt.c — and then the whole friend group, fr fr:

• do_calc_lpt_geom(9)
• ubifs_calc_lpt_geom(9)
• calc_dflt_lpt_geom(9)
• pack_bits(9)
• ubifs_unpack_bits(9)
• ubifs_pack_pnode(9)
• ubifs_pack_nnode(9)
• ubifs_pack_ltab(9)
• ubifs_pack_lsave(9)
• ubifs_add_lpt_dirt(9)
• set_ltab(9)
• ubifs_add_nnode_dirt(9)
• add_pnode_dirt(9)
• calc_nnode_num(9)
• calc_nnode_num_from_parent(9)
• calc_pnode_num_from_parent(9)
• ubifs_create_dflt_lpt(9)
• update_cats(9)
• check_lpt_crc(9)
• check_lpt_type(9)
• unpack_pnode(9)
• ubifs_unpack_nnode(9)
• unpack_ltab(9)
• unpack_lsave(9)
• validate_nnode(9)
• validate_pnode(9)
• set_pnode_lnum(9)
• ubifs_read_nnode(9)
• read_pnode(9)
• read_ltab(9)
• read_lsave(9)
• ubifs_get_nnode(9)
• ubifs_get_pnode(9)
• ubifs_pnode_lookup(9)
• ubifs_lpt_lookup(9)
• dirty_cow_nnode(9)
• dirty_cow_pnode(9)
• ubifs_lpt_lookup_dirty(9)
• ubifs_lpt_calc_hash(9)
• lpt_check_hash(9)
• lpt_init_rd(9)
• lpt_init_wr(9)
• ubifs_lpt_init(9)
• struct lpt_scan_node(9)
• scan_get_nnode(9)
• scan_get_pnode(9)
• ubifs_lpt_scan_nolock(9)
• dbg_chk_pnode(9)
• dbg_check_lpt_nodes(9)

kisses bestie 💋 this page is from ./fs/ubifs and is dated October 2026 — bye! 🌸