ubi_eba_write_leb(9)

✨ ubi_eba_write_leb(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 — literally the manual page for ubi_eba_write_leb(9), and yes we're gonna get through it together, no cap.

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🌸 NAME 🌸

ubi_eba_write_leb — write data to a dynamic volume, periodt 💅

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🦋 SYNOPSIS 🦋

int ubi_eba_write_leb (struct ubi_device *ubi , struct ubi_volume *vol ,
int lnum , const void *buf , int offset , int len );

like, that's the whole signature, copy it exactly bestie, don't @ me 🙈

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🎀 ARGUMENTS 🎀

• ubi — the UBI device description object. it's giving "who am I writing to" main character energy 👑
• vol — the volume description object, aka the vibe of the volume you're touching ✨
• lnum — the logical eraseblock number. yes, logical. not physical. keep up 🫶
• buf — literally the data to write, the actual contents, the star of the show ⭐
• offset — offset within the logical eraseblock where to write, so like, where in the block you're dropping it 💜
• len — how many bytes to write. how many. count them. 🔥

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🌈 DESCRIPTION 🌈

so this function writes data to logical eraseblock lnum of a dynamic volume vol — that's the whole thing, she's an icon, she does one job 💅

returns zero in case of success and a negative error code in case of failure. love that for her 💖

⚠️ ok important caveat bestie: in case of error, it is possible that something was still written to the flash media, but may be some garbage. so like... not a clean fail, there might be ✨mystery garbage✨ left behind 😭

also she's persistent — this function retries UBI_IO_RETRIES times before giving up. she does NOT go down without a fight 🔥

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👑 SEE ALSO 👑

kernel file ./drivers/mtd/ubi/eba.c and honestly the whole friend group 💖:

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_st(9), is_error_sane(9), ubi_eba_copy_leb(9), print_rsvd_warning(9), self_check_eba(9), ubi_eba_init(9)

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that's the whole page bestie, go write some eraseblocks responsibly 🧚‍♀️💜 — this one came from ./drivers/mtd/ubi, dated October 2026, and it's ubi_eba_write_leb(9) signing off 🎀✨🫶