Commit bab68499 authored by Damien Le Moal's avatar Damien Le Moal Committed by Mike Snitzer

dm zoned: check zone capacity

The dm-zoned target cannot support zoned block devices with zones that
have a capacity smaller than the zone size (e.g. NVMe zoned namespaces)
due to the current chunk zone mapping implementation as it is assumed
that zones and chunks have the same size with all blocks usable.
If a zoned drive is found to have zones with a capacity different from
the zone size, fail the target initialization.
Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
Cc: stable@vger.kernel.org # v5.9+
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent ccde2cbf
......@@ -1390,6 +1390,13 @@ static int dmz_init_zone(struct blk_zone *blkz, unsigned int num, void *data)
return -ENXIO;
}
/*
* Devices that have zones with a capacity smaller than the zone size
* (e.g. NVMe zoned namespaces) are not supported.
*/
if (blkz->capacity != blkz->len)
return -ENXIO;
switch (blkz->type) {
case BLK_ZONE_TYPE_CONVENTIONAL:
set_bit(DMZ_RND, &zone->flags);
......
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