ubi_early_get_peb(9)

💅 ubi_early_get_peb(9) — from the Kernel API Manual, bestie

okay so picture this: it's kernel API manual o'clock, and we're talking about ubi_early_get_peb. yeah. that one. and yes before you ask, it's a 9 — section 9, kernel API, we love a niche manual section. let's get into it ✨

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🌸 NAME 🌸

ubi_early_get_peb — get a free physical eraseblock. that's it. that's the whole job. she's a simple girl with a simple purpose 🎀

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✨ SYNOPSIS ✨

struct ubi_ainf_peb * ubi_early_get_peb (struct ubi_device *ubi , struct
ubi_attach_info *ai );

like, look at her. returning a pointer to a struct ubi_ainf_peb * and taking two args. main character energy fr fr 👑

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🫶 ARGUMENTS 🫶

• ubi — the UBI device description object. your device. your little guy. this is who you're working with 💖
• ai — the attaching information. the lore, basically. the context you need to actually do the thing 🌸

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💀 DESCRIPTION 💀

okay so real talk: this function returns a free physical eraseblock. periodt.

here's the vibe check though — it's supposed to be called on the UBI initialization stages, when the wear-leveling subsystem is not initialized yet. so like, early. before the glow-up. before wear-leveling even shows up to the party 🙈

what she does, step by step:

1. picks a physical eraseblock from one of the lists
2. writes the EC header if it is needed
3. removes it from the list

and then she's done. iconic behavior honestly 💅

on success, this function returns a pointer to the "aeb" of the found free PEB. on failure? an error code. so like, check your return values bestie, don't just vibe and assume 😭

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🦋 SEE ALSO 🦋

the whole friend group, no cap — all of these live over in the kernel file ./drivers/mtd/ubi/attach.c:

• find_or_add_av(9)
• ubi_find_or_add_av(9)
• ubi_alloc_aeb(9)
• ubi_free_aeb(9)
• add_to_list(9)
• add_corrupted(9)
• add_fastmap(9)
• validate_vid_hdr(9)
• add_volume(9)
• ubi_compare_lebs(9)
• ubi_add_to_av(9)
• ubi_add_av(9)
• ubi_find_av(9)
• ubi_remove_av(9)
• early_erase_peb(9)
• check_corruption(9)
• scan_peb(9)
• late_analysis(9)
• destroy_av(9)
• destroy_ai(9)
• scan_all(9)
• scan_fast(9)
• ubi_attach(9)
• self_check_ai(9)

lowkey that's a lot of (9)s and I respect every single one of them 🫡

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mwah 💜 that's the page! this cutie lives in ./drivers/mtd/ubi, and she was last touched up in October 2026 — remember her fondly, go read your PEBs, and stay hydrated bestie 🍓🧚