scan_check_cb(9)

💅 scan_check_cb(9) — the kernel API manual, bestie edition

okay so this is a page from the Kernel API Manual and honestly? it's a little guy with a big job. meet scan_check_cb, the scan callback 🎀

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✨ SYNOPSIS ✨

int scan_check_cb (struct ubifs_info *c , const struct ubifs_lprops *lp
, int in_tree , void *arg );

like, look at that signature. four args. immaculate. no notes. 🫶

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🌸 ARGUMENTS 🌸

• c — the UBIFS file-system description object. it's giving "the whole entire filesystem, in one struct" energy 👑
• lp — the LEB properties to scan. that's the lil bundle of facts about one LEB that we're peeking at 🍓
• in_tree — whether the LEB properties are in main memory. yes/no, are they already chilling in RAM or not 💭
• arg — lprops statistics to update. you hand it your stats and it does the updating. teamwork fr fr 💖

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🦋 DESCRIPTION 🦋

so what does it do? it returns a code, and that code is basically a vibe check on the scan itself. three possible moods 😭

• LPT_SCAN_CONTINUE — the scan should keep going, bestie. don't stop now ✨
• LPT_SCAN_ADD — these LEB properties should be added to the tree in main memory. come on in, the tree's lovely 🌈
• LPT_SCAN_STOP — the scan should stop. that's it, we're done, periodt 💀

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💜 SEE ALSO 💜

Kernel file ./fs/ubifs/lprops.c — and like, so many friends. we're not doing a short list here, we're doing the whole group chat:

• get_heap_comp_val(9)
• move_up_lpt_heap(9)
• adjust_lpt_heap(9)
• add_to_lpt_heap(9)
• remove_from_lpt_heap(9)
• lpt_heap_replace(9)
• ubifs_add_to_cat(9)
• ubifs_remove_from_cat(9)
• ubifs_replace_cat(9)
• ubifs_ensure_cat(9)
• ubifs_categorize_lprops(9)
• change_category(9)
• ubifs_calc_dark(9)
• is_lprops_dirty(9)
• ubifs_change_lp(9)
• ubifs_get_lp_stats(9)
• ubifs_change_one_lp(9)
• ubifs_update_one_lp(9)
• ubifs_read_one_lp(9)
• ubifs_fast_find_free(9)
• ubifs_fast_find_empty(9)
• ubifs_fast_find_freeable(9)
• ubifs_fast_find_frdi_idx(9)
• dbg_check_cats(9)
• dbg_check_lprops(9)

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and that's the page!! 💅 mwah. go update your lprops stats, you icon.

sign-off time: this one lives at ./fs/ubifs, dated October 2026, and it goes by scan_check_cb(9) 🎀 catch you in the source, bestie 🧚