leb_write_trylock(9)

💅 leb_write_trylock — bestie's guide to the kernel API manual ✨

okay so real talk, this is a page from the Kernel API Manual, and it's about leb_write_trylock — which is lowkey the most "shoot your shot" function in the whole UBI situation. let's get into it 🫶

---

✨ NAME ✨

leb_write_trylock — try to lock a logical eraseblock for writing. note the word try, bestie. it's giving "no pressure, if you're busy it's fine" energy 💅

---

🦋 SYNOPSIS 🦋

int leb_write_trylock (struct ubi_device *ubi , int vol_id , int lnum );

that's the whole signature, character for character, no cap.

---

🌸 ARGUMENTS 🌸

• ubi — the UBI device description object. like, the whole device's little info card.
• vol_id — volume ID. which volume we're talking about, iykyk.
• lnum — logical eraseblock number. the specific block, bestie. we're being specific.

---

👑 DESCRIPTION 👑

so here's the vibe check: this function locks a logical eraseblock for writing if there is no contention, and does absolutely nothing if there is contention. it does not wait. it does not fight. it does not cause drama. it's the most emotionally mature function in the file honestly 😭

return values, and this is the important part so pay attention:

• 0 — success, we locked it, slay 🎀
• 1 — contention, someone else got there first, no big deal
• a negative error code — failure, and that's when you should be concerned 💀

---

🔥 SEE ALSO 🔥

everything in the group chat, literally all of it:

Kernel file ./drivers/mtd/ubi/eba.c plus 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_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), self_check_eba(9), ubi_eba_init(9) ✨

ngl that's a lot of friends. leb_write_lock(9) is the non-try version btw — the one that actually waits around. this one just checks and dips 🙈

---

🌈 that's the whole page bestie, you ate that. this lil gem lives in ./drivers/mtd/ubi and it's dated October 2026 — so mark your calendar, mwah, bye 💖✨🎀