blk_rq_map_integrity_sg(9)

💖 blk_rq_map_integrity_sg(9) 💖

okay so bestie, welcome to the Kernel API Manual — this one's short and sweet and honestly kind of a vibe. let's get into it ✨

---

🌸 NAME 🌸

blk_rq_map_integrity_sg — literally maps integrity metadata into a scatterlist. that's the whole job. no cap 🫶

---

🦋 SYNOPSIS 🦋

int blk_rq_map_integrity_sg (struct request *rq , struct scatterlist
*sglist );

---

🎀 ARGUMENTS 🎀

• rq — the request you're mapping. it's giving "main character", it's the thing everything's about 💅
• sglist — the target scatterlist. this is where the mapped stuff lands, bestie 🍓

---

✨ DESCRIPTION ✨

so what it does: it takes the integrity vectors sitting inside the request and maps them into a scatterlist. that's it, that's the function 🔥

⚠️ but listen — the scatterlist must be big enough to hold all elements. like, all of them. no slacking. that is to say, size it using blk_rq_count_integrity_sg or rq->nr_integrity_segments first, or you're gonna have a bad time 😭

---

🌈 SEE ALSO 🌈

• Kernel file ./block/blk-mq-dma.c
• blk_rq_dma_map_iter_start(9)
• blk_rq_dma_map_iter_next(9)
• blk_rq_integrity_dma_map_iter_start(9)
• blk_rq_integrity_dma_map_iter_next(9)

go read those, iykyk 👑

---

mwah 💋 this lil page lives in ./block and it's dated October 2026 — periodt, that's the whole manual, slay 🧚‍♀️