2024-02-19 13:03:26

by John Garry

Subject: [PATCH v4 01/11] block: Pass blk_queue_get_max_sectors() a request pointer

Currently blk_queue_get_max_sectors() is passed a enum req_op. In future
the value returned from blk_queue_get_max_sectors() may depend on certain
request flags, so pass a request pointer.

Also use rq->cmd_flags instead of rq->bio->bi_opf when possible.

Signed-off-by: John Garry <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
---
block/blk-merge.c | 3 ++-
block/blk-mq.c | 2 +-
block/blk.h | 6 ++++--
3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 2d470cf2173e..74e9e775f13d 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -592,7 +592,8 @@ static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
if (blk_rq_is_passthrough(rq))
return q->limits.max_hw_sectors;

- max_sectors = blk_queue_get_max_sectors(q, req_op(rq));
+ max_sectors = blk_queue_get_max_sectors(rq);
+
if (!q->limits.chunk_sectors ||
req_op(rq) == REQ_OP_DISCARD ||
req_op(rq) == REQ_OP_SECURE_ERASE)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 2dc01551e27c..0855f75bcad7 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3046,7 +3046,7 @@ void blk_mq_submit_bio(struct bio *bio)
blk_status_t blk_insert_cloned_request(struct request *rq)
{
struct request_queue *q = rq->q;
- unsigned int max_sectors = blk_queue_get_max_sectors(q, req_op(rq));
+ unsigned int max_sectors = blk_queue_get_max_sectors(rq);
unsigned int max_segments = blk_rq_get_max_segments(rq);
blk_status_t ret;

diff --git a/block/blk.h b/block/blk.h
index 1ef920f72e0f..050696131329 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -166,9 +166,11 @@ static inline unsigned int blk_rq_get_max_segments(struct request *rq)
return queue_max_segments(rq->q);
}

-static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
- enum req_op op)
+static inline unsigned int blk_queue_get_max_sectors(struct request *rq)
{
+ struct request_queue *q = rq->q;
+ enum req_op op = req_op(rq);
+
if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
return min(q->limits.max_discard_sectors,
UINT_MAX >> SECTOR_SHIFT);
--
2.31.1

2024-02-19 18:58:34

by Keith Busch

Subject: Re: [PATCH v4 01/11] block: Pass blk_queue_get_max_sectors() a request pointer

On Mon, Feb 19, 2024 at 01:00:59PM +0000, John Garry wrote:
> Currently blk_queue_get_max_sectors() is passed a enum req_op. In future
> the value returned from blk_queue_get_max_sectors() may depend on certain
> request flags, so pass a request pointer.
>
> Also use rq->cmd_flags instead of rq->bio->bi_opf when possible.

Looks good.

Reviewed-by: Keith Busch <[email protected]>