self_check_eba(9)

✨ self_check_eba ✨

okay so bestie, welcome to the Kernel API Manual 💖 today's main character is self_check_eba(9) and she is literally the vibe check of the EBA table world, no cap.

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🌸 NAME 🌸

self_check_eba — run a self check on the EBA table constructed by fastmap. that's it, that's the whole job, and she does it flawlessly 💅

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🦋 SYNOPSIS 🦋

int self_check_eba (struct ubi_device *ubi , struct ubi_attach_info *ai_fastmap , struct ubi_attach_info *ai_scan );

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🎀 ARGUMENTS 🎀

• ubi — UBI device description object 🫶 the whole device, iconic
• ai_fastmap — UBI attach info object created by fastmap ✨ the fastmap-built one
• ai_scan — UBI attach info object created by scanning 🦋 the scanned one

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💜 DESCRIPTION 💜

so here's the sitch: this function returns < 0 in case of an internal error, and 0 otherwise. periodt.

but wait — if a bad EBA table entry was found, it will be printed out and ubi_assert triggers. 😭

real talk bestie, that ubi_assert is not a drill — a bad EBA table entry gets printed out and then the assert goes off. do not ignore her 🙈

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🔥 SEE ALSO 🔥

the kernel file in question is ./drivers/mtd/ubi/eba.c — and honestly the whole friend group showed up, so here's every single one of them, not me listing all 30 but here we are 💀

• struct ubi_eba_entry(9)
• struct ubi_eba_table(9)
• ubi_next_sqnum(9)
• ubi_get_compat(9)
• ubi_eba_get_ldesc(9)
• ubi_eba_create_table(9)
• ubi_eba_destroy_table(9)
• ubi_eba_copy_table(9)
• ubi_eba_replace_table(9)
• ltree_lookup(9)
• ltree_add_entry(9)
• leb_read_lock(9)
• leb_read_unlock(9)
• leb_write_lock(9)
• leb_write_trylock(9)
• leb_write_unlock(9)
• ubi_eba_is_mapped(9)
• ubi_eba_unmap_leb(9)
• check_mapping(9)
• ubi_eba_read_leb(9)
• ubi_eba_read_leb_sg(9)
• try_recover_peb(9)
• recover_peb(9)
• try_write_vid_and_data(9)
• ubi_eba_write_leb(9)
• ubi_eba_write_leb_st(9)
• is_error_sane(9)
• ubi_eba_copy_leb(9)
• print_rsvd_warning(9)
• ubi_eba_init(9)

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and that's the page!! 🎀✨🦋 this gorgeous thing lives over in ./drivers/mtd/ubi, it's dated October 2026, and it's filed under self_check_eba(9) — mwah, drink water, go read eba.c 💋👑