block: mark the bio as cloned in bio_iov_bvec_set

bio_iov_bvec_set clones the bio_vecs from the iter, and thus should be
treated like a cloned bio in every respect.  That also includes not
touching bi_max_vecs as that is a property of the bio allocation and not
its current payload.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/bio.c b/block/bio.c
index f753201..a36f955 100644 (file)
--- a/block/bio.c
+++ b/block/bio.c
@@ -937,11 +937,11 @@ static int bio_iov_bvec_set(struct bio *bio, struct iov_iter *iter)
        WARN_ON_ONCE(BVEC_POOL_IDX(bio) != 0);
 
        bio->bi_vcnt = iter->nr_segs;
-       bio->bi_max_vecs = iter->nr_segs;
        bio->bi_io_vec = (struct bio_vec *)iter->bvec;
        bio->bi_iter.bi_bvec_done = iter->iov_offset;
        bio->bi_iter.bi_size = iter->count;
        bio_set_flag(bio, BIO_NO_PAGE_REF);
+       bio_set_flag(bio, BIO_CLONED);
 
        iov_iter_advance(iter, iter->count);
        return 0;