ubi_leb_read_sg(9)

🎀 ubi_leb_read_sg — Kernel API Manual, but make it bestie-friendly 🎀

okay so this is page ubi_leb_read_sg(9) from the Kernel API Manual, and honestly? she's a little niche but she ATE. let's get into it 💅

---

✨ NAME ✨

ubi_leb_read_sg — read data into a scatter gather list. that's the whole vibe. she reads, she gathers, she scatters. iconic behavior fr 💖

---

🦋 SYNOPSIS 🦋

int ubi_leb_read_sg (struct ubi_volume_desc *desc , int lnum , struct ubi_sgl *sgl , int offset , int len , int check );

that's six arguments bestie, count 'em. she's a committed function 🔥

---

🌸 ARGUMENTS 🌸

• desc — the volume descriptor. it's giving "your hall pass for this volume" energy 🎫
• lnum — the logical eraseblock number you're reading from. which block? this block. be specific 🎯
• sgl — the UBI scatter gather list where the read data gets stored. this is the destination, the main character of the operation 👑
• offset — offset within the logical eraseblock to read from. not from the start of everything, from the start of this block. important distinction, iykyk 📍
• len — how many bytes to read. how many? len. slay 💅
• check — whether UBI has to check the read data's CRC or not. your call, bestie, but choose wisely 🫶

---

⭐ DESCRIPTION ⭐

so here's the tea: this function works exactly like ubi_leb_read_sg. (yes she said her own name. no i'm not fixing it, i'm just the messenger 🫡)

BUT — and this is the plot twist — instead of storing the read data into a buffer, she writes to an UBI scatter gather list. same energy, different destination. buffer who? never heard of her 💀

---

🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/mtd/ubi/kapi.c in case you need to go read the source like the little detective you are 🔍

and here's the whole friend group, all invited to the party:

• ubi_do_get_device_info(9)
• ubi_get_device_info(9)
• ubi_do_get_volume_info(9)
• ubi_get_volume_info(9)
• ubi_open_volume(9)
• ubi_open_volume_nm(9)
• ubi_get_num_by_path(9)
• ubi_open_volume_path(9)
• ubi_close_volume(9)
• leb_read_sanity_check(9)
• ubi_leb_read(9)
• ubi_leb_write(9)
• ubi_leb_erase(9)
• ubi_leb_unmap(9)
• ubi_leb_map(9)
• ubi_is_mapped(9)
• ubi_sync(9)
• ubi_register_volume_notifier(9)
• ubi_unregister_volume_notifier(9)

---

lowkey a whole squad. go read them, they're all lore-relevant 💜

---

and that's the page!! mwah 💋 this one's signed off from ./drivers/mtd/ubi and dated October 2026 — so mark your calendars besties, the future is now ⭐🦋✨