Commit bab68499 authored May 19, 2021 by Damien Le Moal Committed by Mike Snitzer Jun 04, 2021

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: Damien Le Moal <damien.lemoal@wdc.com>
Cc: stable@vger.kernel.org # v5.9+
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

parent ccde2cbf

drivers/md/dm-zoned-metadata.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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);