ubifs_budget_space(9)

💅 ubifs_budget_space(9) ✨

okay so this is a page straight out of the Kernel API Manual, and honestly? it's a banger. buckle up bestie 🎀

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🌸 NAME 🌸

ubifs_budget_space — literally just making sure there's enough space to actually finish what you started, no cap.

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✨ SYNOPSIS ✨

int ubifs_budget_space (struct ubifs_info *c , struct ubifs_budget_req *req );

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🦋 ARGUMENTS 🦋

• c — the UBIFS file-system description object. the whole vibe of the filesystem lives in here 🫶
• req — the budget request. like, what you're asking for, space-wise.

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💖 DESCRIPTION 💖

bestie, listen. this function allocates budget for an operation. that's the whole thing. it's the bouncer at the club checking if there's room for you 💅

it does this using a pessimistic approximation of how much flash space the operation is gonna need — pessimism is the moment here, she's not being dramatic, she's being safe.

the goal of this function is to make sure UBIFS always has flash space to flush all dirty pages, dirty inodes, and dirty znodes (that's the liability, iykyk). so she's got your back fr fr.

not me forgetting to mention — this function may force commit, garbage-collection or write-back. so yeah, she can just. do stuff. main character energy ✨

what does she return?

• zero 🎀 in case of success
• -ENOSPC 😭 if there is no free space
• other negative error codes 💀 in case of failures

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👑 SEE ALSO 👑

kernel file ./fs/ubifs/budget.c and honestly her entire friend group:

• shrink_liability(9)
• run_gc(9)
• get_liability(9)
• make_free_space(9)
• ubifs_calc_min_idx_lebs(9)
• ubifs_calc_available(9)
• can_use_rp(9)
• do_budget_space(9)
• calc_idx_growth(9)
• calc_data_growth(9)
• calc_dd_growth(9)
• ubifs_release_budget(9)
• ubifs_convert_page_budget(9)
• ubifs_release_dirty_inode_budget(9)
• ubifs_reported_space(9)
• ubifs_get_free_space_nolock(9)
• ubifs_get_free_space(9)

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okay that's the whole page, slay 🌈💜 — it lives in ./fs/ubifs, and this edition was dated October 2026. go be iconic with your flash space, bestie 🍓🧚