From: Luis Chamberlain <mcg...@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 <h...@suse.de> Reviewed-by: Damien Le Moal <damien.lem...@opensource.wdc.com> Reviewed-by: Bart Van Assche <bvanass...@acm.org> Reviewed-by: Mike Snitzer <snit...@kernel.org> Signed-off-by: Luis Chamberlain <mcg...@kernel.org> Signed-off-by: Pankaj Raghav <p.rag...@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 -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel