diff mbox series

[3/7] nvmet: introduce bdev_zone_no helper

Message ID 20230106083317.93938-4-p.raghav@samsung.com
State New
Headers
Series block zoned cleanups |

Commit Message

Pankaj Raghav Jan. 6, 2023, 8:33 a.m. UTC 
  A generic bdev_zone_no() helper is added to calculate zone number for a
given sector in a block device. This helper internally uses disk_zone_no()
to find the zone number.

Use the helper bdev_zone_no() to calculate nr of zones. This let's us
make modifications to the math if needed in one place.

Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
---
 drivers/nvme/target/zns.c | 3 +--
 include/linux/blkdev.h    | 5 +++++
 2 files changed, 6 insertions(+), 2 deletions(-)

Comments

Damien Le Moal Jan. 6, 2023, 11:02 a.m. UTC | #1 
On 1/6/23 17:33, Pankaj Raghav wrote:
> A generic bdev_zone_no() helper is added to calculate zone number for a
> given sector in a block device. This helper internally uses disk_zone_no()
> to find the zone number.
> 
> Use the helper bdev_zone_no() to calculate nr of zones. This let's us
> make modifications to the math if needed in one place.
> 
> Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>

Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Bart Van Assche Jan. 6, 2023, 10:39 p.m. UTC | #2 
On 1/6/23 00:33, Pankaj Raghav wrote:
> A generic bdev_zone_no() helper is added to calculate zone number for a
> given sector in a block device. This helper internally uses disk_zone_no()
> to find the zone number.
> 
> Use the helper bdev_zone_no() to calculate nr of zones. This let's us
> make modifications to the math if needed in one place.

Please use the imperative mood in patch descriptions (... is added -> 
add ...).

let's -> lets

If these two issues are addressed, please add:

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Chaitanya Kulkarni Jan. 9, 2023, 7:42 a.m. UTC | #3 
On 1/6/23 00:33, Pankaj Raghav wrote:
> A generic bdev_zone_no() helper is added to calculate zone number for a
> given sector in a block device. This helper internally uses disk_zone_no()
> to find the zone number.
> 
> Use the helper bdev_zone_no() to calculate nr of zones. This let's us
> make modifications to the math if needed in one place.
> 
> Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>

with Bart's comments fixed...

looks good....

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>

-ck
Christoph Hellwig Jan. 10, 2023, 6:55 a.m. UTC | #4 
s/nvmet/block/ in the Subject.

Otherwise:

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/drivers/nvme/target/zns.c b/drivers/nvme/target/zns.c
index 1254cf57e008..7e4292d88016 100644
--- a/drivers/nvme/target/zns.c
+++ b/drivers/nvme/target/zns.c
@@ -254,8 +254,7 @@  static unsigned long nvmet_req_nr_zones_from_slba(struct nvmet_req *req)
 {
 	unsigned int sect = nvmet_lba_to_sect(req->ns, req->cmd->zmr.slba);
 
-	return bdev_nr_zones(req->ns->bdev) -
-		(sect >> ilog2(bdev_zone_sectors(req->ns->bdev)));
+	return bdev_nr_zones(req->ns->bdev) - bdev_zone_no(req->ns->bdev, sect);
 }
 
 static unsigned long get_nr_zones_from_buf(struct nvmet_req *req, u32 bufsize)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 04b7cbfd7a2a..669cf4fed1ad 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1287,6 +1287,11 @@  static inline bool bdev_is_zoned(struct block_device *bdev)
 	return blk_queue_is_zoned(bdev_get_queue(bdev));
 }
 
+static inline unsigned int bdev_zone_no(struct block_device *bdev, sector_t sec)
+{
+	return disk_zone_no(bdev->bd_disk, sec);
+}
+
 static inline bool bdev_op_is_zoned_write(struct block_device *bdev,
 					  blk_opf_t op)
 {