[PATCH 08/12] block: add bio number of vecs helper for partials
From: Keith Busch <hidden>
Date: 2022-06-30 20:43:00
Also in:
linux-fsdevel, linux-nvme
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
From: Keith Busch <kbusch@kernel.org> Bit buckets get their own vector, so need to allocate enough to hold both the preregistered bvecs and the bit buckets. Signed-off-by: Keith Busch <kbusch@kernel.org> --- include/linux/bio.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 992ee987f273..ded38accf009 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h@@ -452,6 +452,17 @@ static inline int bio_iov_vecs_to_alloc(struct iov_iter *iter, int max_segs) return iov_iter_npages(iter, max_segs); } +static inline int bio_iov_vecs_to_alloc_partial(struct iov_iter *iter, + int max_segs, bool trunc, + bool skip) +{ + if (skip || trunc) + return min(iov_iter_npages(iter, max_segs) + skip + trunc, + max_segs); + else + return bio_iov_vecs_to_alloc(iter, max_segs); +} + struct request_queue; extern int submit_bio_wait(struct bio *bio);
--
2.30.2