is_last_bud(9)

💅 is_last_bud(9) — like, the Kernel API Manual era 🎀

okay so bestie, welcome to the kernel API manual, and today's main character is is_last_bud — a lil function with big "am I the last one in the journal head?" energy. it's giving detective vibes, ngl 🕵️‍♀️

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✨ NAME ✨

is_last_bud — check if the bud is the last in the journal head.

like, that's literally its whole job. it checks. does the bud sit last in the journal head? that's the question. 💅

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🌸 SYNOPSIS 🌸

int is_last_bud (struct ubifs_info *c , struct ubifs_bud *bud );

two pointers in, one int out. short, sweet, slay.

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🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object. your classic fs context situation, iykyk.
• bud — the bud description object. this is the bud we're vibe-checking, fr fr.

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💖 DESCRIPTION 💖

okay so here's the tea 🍓: this function checks if bud bud is the last bud in its journal head. that's it, that's the whole plot.

and WHY do we care? because 'replay_bud' uses that info to decide whether the bud can have corruptions or not. and the reason is honestly iconic — only last buds can be corrupted by power cuts ⚡💀 so if you're not the last bud, no corruption drama for you, periodt.

it returns 1 if this IS the last bud, and 0 if not. binary queen. 👑

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🔥 SEE ALSO 🔥

Kernel file ./fs/ubifs/replay.c — plus the whole friend group:

• struct replay_entry(9)
• struct bud_entry(9)
• set_bud_lprops(9)
• set_buds_lprops(9)
• trun_remove_range(9)
• inode_still_linked(9)
• apply_replay_entry(9)
• replay_entries_cmp(9)
• apply_replay_list(9)
• destroy_replay_list(9)
• insert_node(9)
• insert_dent(9)
• ubifs_validate_entry(9)
• authenticate_sleb(9)
• replay_bud(9)
• replay_buds(9)
• destroy_bud_list(9)
• add_replay_bud(9)
• validate_ref(9)
• replay_log_leb(9)
• take_ihead(9)
• ubifs_replay_journal(9)

that's the roster, no skips, no cuts 💜

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💡 friendly reminder bestie: return value is 1 = yes last bud, 0 = nope. don't mix that up or it's giving chaos 😭

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and that's a wrap! brought to you by ./fs/ubifs, dated October 2026 — stay hydrated, read your manpages, and remember: only the last bud catches the power-cut cooties 🌈✨🫶