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authorChristoph Hellwig <hch@lst.de>2022-07-27 12:22:58 -0400
committerJens Axboe <axboe@kernel.dk>2022-08-02 21:08:53 -0600
commita85b36375b05f70301f15cafb9030cae7c789f76 (patch)
tree12b6b9dbb5d5f2b52588583cfc53d63b3ebf6048 /block/blk-merge.c
parent46754bd056053785d7079f1d48f7f571728dcb47 (diff)
block: move the call to get_max_io_size out of blk_bio_segment_split
Prepare for reusing blk_bio_segment_split for (file system controlled) splits of REQ_OP_ZONE_APPEND bios by letting the caller control the maximum size of the bio. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20220727162300.3089193-5-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-merge.c')
-rw-r--r--block/blk-merge.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 30872a353764..ce73b3b6c2a7 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -250,11 +250,12 @@ static bool bvec_split_segs(const struct request_queue *q,
* @q: [in] request queue pointer
* @segs: [out] number of segments in the bio with the first half of the sectors
* @bs: [in] bio set to allocate the clone from
+ * @max_bytes: [in] maximum number of bytes per bio
*
* Clone @bio, update the bi_iter of the clone to represent the first sectors
* of @bio and update @bio->bi_iter to represent the remaining sectors. The
* following is guaranteed for the cloned bio:
- * - That it has at most get_max_io_size(@bio, @q) sectors.
+ * - That it has at most @max_bytes worth of data
* - That it has at most queue_max_segments(@q) segments.
*
* Except for discard requests the cloned bio will point at the bi_io_vec of
@@ -264,12 +265,11 @@ static bool bvec_split_segs(const struct request_queue *q,
* split bio has finished.
*/
static struct bio *bio_split_rw(struct bio *bio, struct request_queue *q,
- unsigned *segs, struct bio_set *bs)
+ unsigned *segs, struct bio_set *bs, unsigned max_bytes)
{
struct bio_vec bv, bvprv, *bvprvp = NULL;
struct bvec_iter iter;
unsigned nsegs = 0, bytes = 0;
- const unsigned max_bytes = get_max_io_size(bio, q) << 9;
const unsigned max_segs = queue_max_segments(q);
bio_for_each_bvec(bv, bio, iter) {
@@ -343,7 +343,8 @@ struct bio *__bio_split_to_limits(struct bio *bio, struct request_queue *q,
split = bio_split_write_zeroes(bio, q, nr_segs, bs);
break;
default:
- split = bio_split_rw(bio, q, nr_segs, bs);
+ split = bio_split_rw(bio, q, nr_segs, bs,
+ get_max_io_size(bio, q) << SECTOR_SHIFT);
break;
}