add_node(9)

💫 add_node(9) — the kernel API manual, but make it make sense 💫

okay bestie, so this is a page from the Kernel API Manual — we're deep in kernel-land, specifically the UBIFS file system, and this one little function is out here doing the absolute most. Let's get into it 🫶

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✨ NAME ✨

add_node — literally just: add a node to the consolidated log. that's the whole vibe. 🎀

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🌸 SYNOPSIS 🌸

int add_node (struct ubifs_info *c , void *buf , int *lnum , int *offs ,
void *node );

she takes five things and gives you back an int. slay. ✨

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💅 ARGUMENTS 💅

• c — the UBIFS file-system description object. your whole filesystem's little ID card, basically.
• buf — buffer to which to add. this is where the adding happens, bestie.
• lnum — LEB number to which to write is passed and returned here. so it goes in and comes back out — it's giving round trip 🔥
• offs — offset to where to write is passed and returned here. same deal, in-and-out energy. no cap.
• node — node to add. the main character of this whole function, honestly 👑

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🦋 DESCRIPTION 🦋

so here's the tea: this function returns 0 on success and a negative error code on failure. that's it. that's the whole description. iconic of her honestly 💀

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🌈 SEE ALSO 🌈

she doesn't exist in a vacuum, bestie — the whole squad is right here in the Kernel file ./fs/ubifs/log.c:

• ubifs_search_bud(9)
• ubifs_get_wbuf(9)
• empty_log_bytes(9)
• ubifs_add_bud(9)
• ubifs_add_bud_to_log(9)
• remove_buds(9)
• ubifs_log_start_commit(9)
• ubifs_log_end_commit(9)
• ubifs_log_post_commit(9)
• struct done_ref(9)
• done_already(9)
• destroy_done_tree(9)
• ubifs_consolidate_log(9)
• dbg_check_bud_bytes(9)

go read them all, i'll wait 💜

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okay and fr fr the cute little sign-off: this page lives under ./fs/ubifs, it's the October 2026 edition, and the whole thing is filed under add_node(9) in the Kernel API Manual. periodt. 🌟💖