STRUCT SCAN_DATA(9)

✨ NAME ✨

struct scan_data — the little data bundle that gets handed off to scan callback functions 🫶

okay so this page is from the Kernel API Manual, and it's a struct page, so it's all about a kernel data structure. reading it, bestie — it's short, it's sweet, it's giving "supporting cast member that makes the whole plot work" 💅

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🌸 SYNOPSIS 🌸

struct scan_data {
    int min_space;
    int pick_free;
    int lnum;
    int exclude_index;
 };

that's the whole thing. four ints. no cap, that's it ✨

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🎀 Members 🎀

• min_space — the smallest number of bytes you want to bother scanning for. like a little filter: below this, don't even look 👀
• pick_free — a lil yes/no situation: is it OK to scan for, and pick up, empty LEBs? that's the whole question this field answers 💖
• lnum — wherever the scan finds an LEB number, it gets returned right here. it's the output slot 🎁
• exclude_index — again a yes/no vibe: should index LEBs be excluded? set it accordingly 🙈

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🦋 SEE ALSO 🦋

this is where it gets iconique — the entire UBIFS finder-functions friend group, all living in the kernel file ./fs/ubifs/find.c 👑

• valuable(9)
• scan_for_dirty_cb(9)
• scan_for_dirty(9)
• ubifs_find_dirty_leb(9)
• scan_for_free_cb(9)
• do_find_free_space(9)
• ubifs_find_free_space(9)
• scan_for_idx_cb(9)
• scan_for_leb_for_idx(9)
• ubifs_find_free_leb_for_idx(9)
• ubifs_save_dirty_idx_lnums(9)
• scan_dirty_idx_cb(9)
• find_dirty_idx_leb(9)
• get_idx_gc_leb(9)
• find_dirtiest_idx_leb(9)
• ubifs_find_dirty_idx_leb(9)

like, that's a whole group chat right there — go read them all if you want the full lore 🧚💜

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ngl, if you're here you're probably writing or reading a scan callback. say hi to min_space for me 💀

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that's the page, bestie! 🌈 this one ships out of ./fs/ubifs and it's dated October 2026 — mark your calendars, mwah 💋🎀⭐