[PATCH v2 07/16] block: Pass blk_queue_get_max_sectors() a request pointer

John Garry
2023-12-12T11:09:47Z

Currently blk_queue_get_max_sectors() is passed a enum req_op, which does
not work for atomic writes. This is because an atomic write has a different
max sectors values to a regular write, and we need the rq->cmd_flags
to know that we have an atomic write, so pass the request pointer, which
has all information available.

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

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 65e75efa9bd3..0ccc251e22ff 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -596,7 +596,8 @@ 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 ac18f802c027..58bacf9029b3 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -3027,7 +3027,7 @@ 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 08a358bc0919..94e330e9c853 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);
--
2.35.3