[PATCH v8 01/10] block: Pass blk_queue_get_max_sectors() a request pointer

John Garry
2024-06-10T10:44:45Z

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.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: John Garry <john.g.garry@oracle.com>
---
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 8534c35e0497..8957e08e020c 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -593,7 +593,8 @@ 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 3b4df8e5ac9e..e690b9c6afb7 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3041,7 +3041,7 @@ 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 189bc25beb50..75c1683fc320 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -181,9 +181,11 @@ 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