linux-kernel - [PATCH v10 10/13] dm-table: allow zoned devices with non power-of-2 zone sizes

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Date:   Thu, 11 Aug 2022 16:30:40 +0200
From:   Pankaj Raghav <p.raghav@...sung.com>
To:     snitzer@...nel.org, axboe@...nel.dk, hch@....de, agk@...hat.com,
        damien.lemoal@...nsource.wdc.com
Cc:     linux-block@...r.kernel.org, Johannes.Thumshirn@....com,
        bvanassche@....org, matias.bjorling@....com, hare@...e.de,
        gost.dev@...sung.com, linux-nvme@...ts.infradead.org,
        jaegeuk@...nel.org, pankydev8@...il.com,
        linux-kernel@...r.kernel.org, dm-devel@...hat.com,
        Pankaj Raghav <p.raghav@...sung.com>
Subject: [PATCH v10 10/13] dm-table: allow zoned devices with non power-of-2
 zone sizes

Allow dm to support zoned devices with non power-of-2(po2) zone sizes as
the block layer now supports it.

Signed-off-by: Pankaj Raghav <p.raghav@...sung.com>
Reviewed-by: Bart Van Assche <bvanassche@....org>
Reviewed-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
---
 drivers/md/dm-table.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 332f96b58252..31eb1d29d136 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -250,7 +250,7 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
 	if (bdev_is_zoned(bdev)) {
 		unsigned int zone_sectors = bdev_zone_sectors(bdev);
 
-		if (start & (zone_sectors - 1)) {
+		if (!bdev_is_zone_start(bdev, start)) {
 			DMWARN("%s: start=%llu not aligned to h/w zone size %u of %pg",
 			       dm_device_name(ti->table->md),
 			       (unsigned long long)start,
@@ -267,7 +267,7 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
 		 * devices do not end up with a smaller zone in the middle of
 		 * the sector range.
 		 */
-		if (len & (zone_sectors - 1)) {
+		if (!bdev_is_zone_start(bdev, len)) {
 			DMWARN("%s: len=%llu not aligned to h/w zone size %u of %pg",
 			       dm_device_name(ti->table->md),
 			       (unsigned long long)len,
@@ -1642,8 +1642,7 @@ static int validate_hardware_zoned_model(struct dm_table *t,
 		return -EINVAL;
 	}
 
-	/* Check zone size validity and compatibility */
-	if (!zone_sectors || !is_power_of_2(zone_sectors))
+	if (!zone_sectors)
 		return -EINVAL;
 
 	if (dm_table_any_dev_attr(t, device_not_matches_zone_sectors, &zone_sectors)) {
-- 
2.25.1