Messages in this thread Patch in this message | | | From | Pankaj Raghav <> | Subject | [PATCH v12 08/13] dm-zoned: ensure only power of 2 zone sizes are allowed | Date | Tue, 23 Aug 2022 14:18:54 +0200 |
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From: Luis Chamberlain <mcgrof@kernel.org>
dm-zoned relies on the assumption that the zone size is a power-of-2(po2) and the zone capacity is same as the zone size.
Ensure only po2 devices can be used as dm-zoned target until a native support for zoned devices with non-po2 zone size is added.
Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org> Signed-off-by: Pankaj Raghav <p.raghav@samsung.com> --- drivers/md/dm-zoned-target.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c index 95b132b52f33..9325bf5dee81 100644 --- a/drivers/md/dm-zoned-target.c +++ b/drivers/md/dm-zoned-target.c @@ -792,6 +792,10 @@ static int dmz_fixup_devices(struct dm_target *ti) return -EINVAL; } zone_nr_sectors = bdev_zone_sectors(bdev); + if (!is_power_of_2(zone_nr_sectors)) { + ti->error = "Zone size is not a power-of-2 number of sectors"; + return -EINVAL; + } zoned_dev->zone_nr_sectors = zone_nr_sectors; zoned_dev->nr_zones = bdev_nr_zones(bdev); } @@ -804,6 +808,10 @@ static int dmz_fixup_devices(struct dm_target *ti) return -EINVAL; } zoned_dev->zone_nr_sectors = bdev_zone_sectors(bdev); + if (!is_power_of_2(zoned_dev->zone_nr_sectors)) { + ti->error = "Zone size is not a power-of-2 number of sectors"; + return -EINVAL; + } zoned_dev->nr_zones = bdev_nr_zones(bdev); } -- 2.25.1
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