free_obsolete_cnodes(9)

🎀 free_obsolete_cnodes(9) 🎀

okay bestie, welcome to the kernel API manual, this one's from the Kernel API Manual series and it's all about free_obsolete_cnodes — literally the little cleanup fairy of UBIFS commit-land ✨

✨ NAME ✨

free_obsolete_cnodes — free obsolete cnodes for commit end 💅

🌸 SYNOPSIS 🌸

void free_obsolete_cnodes (struct ubifs_info *c );

no return value, no drama, she just does the thing and leaves 🫶

🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object 💖 this is the whole entire file system's info struct, like her little ID card, and she needs it to know which cnodes are the obsolete ones

👑 SEE ALSO 👑

these live in the kernel file ./fs/ubifs/lpt_commit.c and honestly the whole friend group is here, say hi 👋

• first_dirty_cnode(9)
• next_dirty_cnode(9)
• get_cnodes_to_commit(9)
• upd_ltab(9)
• alloc_lpt_leb(9)
• layout_cnodes(9)
• realloc_lpt_leb(9)
• write_cnodes(9)
• next_pnode_to_dirty(9)
• add_pnode_dirt(9)
• do_make_pnode_dirty(9)
• make_tree_dirty(9)
• need_write_all(9)
• lpt_tgc_start(9)
• lpt_tgc_end(9)
• populate_lsave(9)
• nnode_lookup(9)
• make_nnode_dirty(9)
• make_pnode_dirty(9)
• make_ltab_dirty(9)
• make_lsave_dirty(9)
• make_node_dirty(9)
• get_lpt_node_len(9)
• get_pad_len(9)
• get_lpt_node_type(9)
• is_a_node(9)
• lpt_gc_lnum(9)
• lpt_gc(9)
• ubifs_lpt_start_commit(9)
• ubifs_lpt_end_commit(9)
• ubifs_lpt_post_commit(9)
• first_nnode(9)
• next_nnode(9)
• ubifs_lpt_free(9)
• dbg_is_all_ff(9)
• dbg_is_nnode_dirty(9)
• dbg_is_pnode_dirty(9)
• dbg_is_ltab_dirty(9)
• dbg_is_lsave_dirty(9)
• dbg_is_node_dirty(9)
• dbg_check_ltab_lnum(9)
• dbg_check_ltab(9)
• dbg_chk_lpt_free_spc(9)
• dbg_chk_lpt_sz(9)
• dump_lpt_leb(9)
• ubifs_dump_lpt_lebs(9)
• dbg_populate_lsave(9)

not me listing all forty-seven of them 💀 but fr fr they're all linked, go read them, iykyk

and that's the whole page bestie!! this iconic little entry ships out of ./fs/ubifs in the October 2026 release, and yeah the footer still says free_obsolete_cnodes(9) because she's consistent like that 💜 slay 💅✨