calc_data_growth(9)

👑 calc_data_growth — a Kernel API Manual moment 💅

okay bestie, buckle up, because this is calc_data_growth(9) from the Kernel API Manual and it's literally here to do one iconic little job: figure out the approximate amount of new data that comes out of a budgeting request. that's it. that's the whole vibe. ✨

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🌸 NAME 🌸

calc_data_growth — calculate approximate amount of new data from budgeting request.

like, approximate. don't come for her with your exact-math expectations, she said what she said 🫶

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💖 SYNOPSIS 💖

int calc_data_growth (const struct ubifs_info *c , const struct ubifs_budget_req *req );

returns an int, takes two pointers, no cap. very demure, very mindful 🔥

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🎀 ARGUMENTS 🎀

• c — the UBIFS file-system description object, aka the whole personality of the filesystem, passed in as a const struct ubifs_info *. she's the main character here, respectfully 💅
• req — the budgeting request itself, const struct ubifs_budget_req *. this is the ask, the little "hey can i get some space" note that she's about to do math on 🧚

both are const pointers btw — she's looking, not touching. respect the boundaries ✨

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🦋 SEE ALSO 🦋

soooo many siblings, honestly a whole friend group. all of these live in the kernel file ./fs/ubifs/budget.c (listed in that exact order too, iykyk):

• 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_dd_growth(9)
• ubifs_budget_space(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)

go read them all, bestie, they're all in the same ./fs/ubifs family 🌈

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⭐ this has been your girl from ./fs/ubifs, stamped October 2026, signing off — stay budgeting, stay approximate, slay the whole kernel 💜🎀