lpt_gc(9)

💅 lpt_gc (it's a kernel API thing, iykyk)

okay so bestie, welcome to lpt_gc — a page straight out of the Kernel API Manual and honestly? she's giving backend-main-character energy. it's lowercase, it's mysterious, and it's doing LPT garbage collection for UBIFS. let's get into it 🫶

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✨ NAME ✨

lpt_gc — LPT garbage collection. that's it, that's the whole vibe. no cap. 🗑️✨

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🌸 SYNOPSIS 🌸

int lpt_gc (struct ubifs_info *c );

yes that one little int returns and yes it takes exactly one argument. copy it exactly, bestie, don't be out here retyping the signature from memory 💀

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🎀 ARGUMENTS 🎀

• c — the UBIFS file-system description object. that's your whole context right there, she's holding all the info 💖

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🦋 DESCRIPTION 🦋

okay so what does she actually do? she selects an LPT LEB for LPT garbage collection and then calls lpt_gc_lnum. iconic behaviour, honestly 👑

and what does she return?

• 0 on success — slay, we ate 🎉
• a negative error code on failure — not slay, but at least you know 😭

fr fr, that's the whole description. no secret extra behaviour, no hidden flags. don't go inventing stuff, i'm warning you 🙈

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🌈 SEE ALSO 🌈

okay this section is long and we are NOT skipping a single one of these, periodt. so grab a snack 🍓 — here's the whole group chat:

• Kernel file ./fs/ubifs/lpt_commit.c — the actual source, go 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)
• ubifs_lpt_start_commit(9)
• free_obsolete_cnodes(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)

like i said. all of them. no gatekeeping here 💜

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and that's the page!! 💅 this little gem lives under ./fs/ubifs and she's dated October 2026 — so go check her out, mwah, bye bestie 🧚‍♀️🌟