Return the currently active bvec segment, potentially spanning multiple
pages.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
include/linux/blkdev.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0de92b29f589..255e20313cde 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -929,6 +929,13 @@ static inline unsigned int blk_rq_payload_bytes(struct request *rq)
return blk_rq_bytes(rq);
}
+static inline struct bio_vec req_bvec(struct request *rq)
+{
+ if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
+ return rq->special_vec;
+ return mp_bvec_iter_bvec(rq->bio->bi_io_vec, rq->bio->bi_iter);
+}
+
static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
int op)
{
--
2.20.1
