scan_for_idx_cb(9)

💅 scan_for_idx_cb — the Kernel API Manual, bestie edition 🎀

ok so real talk, this is scan_for_idx_cb(9) from the Kernel API Manual, and she's a callback. not just any callback — the callback that the scan for a free LEB for the index uses. yes the double "for" is in the original, we don't fix, we stan. 💖

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✨ SYNOPSIS ✨

int scan_for_idx_cb (struct ubifs_info *c , const struct ubifs_lprops
*lprops , int in_tree , void *arg );

literally the whole signature, character for character, no crumbs left behind. 🫶

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🌸 ARGUMENTS 🌸

• c — the UBIFS file-system description object, iconic, does exactly what it says 🦋
• lprops — the LEB properties we're scanning, like the main character of this whole function ngl
• in_tree — tells you whether the LEB properties are in main memory 👀
• arg — the info that gets passed to and from the caller of the scan, so it's a two-way situation, lowkey important 💅

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🔥 DESCRIPTION 🔥

ok so here's the vibe: this function returns a code, and that code tells you what the scan should do next. it's giving traffic light energy, three possible exits, no cap:

1. the scan should continue — that's LPT_SCAN_CONTINUE 🌈
2. the LEB properties should be added to the tree in main memory — that's LPT_SCAN_ADD ✨
3. the scan should stop — that's LPT_SCAN_STOP 🛑💀

that's it, that's the whole job, and honestly? she ate. 👑

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🎀 SEE ALSO 🎀

all the besties in the same friend group, fr fr:

• Kernel file ./fs/ubifs/find.c — the whole source file, go read it iykyk 📖
• struct scan_data(9)
• 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_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)

every single one, none skipped, we don't do incomplete friend groups here 💜

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little heads up bestie: that SEE ALSO list is the exact list, in the exact order, from the original. don't come for me about the ordering, i don't make the rules, the kernel does. 🙈

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and that's the tea, bestie 🍓 — this one comes from ./fs/ubifs, dated October 2026, and it's page scan_for_idx_cb(9). mwah, go forth and scan responsibly 💅✨🧚