This is a note to let you know that I've just added the patch titled
dm zoned: check zone capacity
to the 5.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-zoned-check-zone-capacity.patch
and it can be found in the queue-5.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bab68499428ed934f0493ac74197ed6f36204260 Mon Sep 17 00:00:00 2001
From: Damien Le Moal <damien.lemoal@xxxxxxx>
Date: Wed, 19 May 2021 10:26:16 +0900
Subject: dm zoned: check zone capacity
From: Damien Le Moal <damien.lemoal@xxxxxxx>
commit bab68499428ed934f0493ac74197ed6f36204260 upstream.
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@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v5.9+
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-zoned-metadata.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/md/dm-zoned-metadata.c
+++ b/drivers/md/dm-zoned-metadata.c
@@ -1390,6 +1390,13 @@ static int dmz_init_zone(struct blk_zone
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);
Patches currently in stable-queue which might be from damien.lemoal@xxxxxxx are
queue-5.12/block-introduce-bio_zone_write_locked-bio-flag.patch
queue-5.12/dm-fix-dm_accept_partial_bio-relative-to-zone-manage.patch
queue-5.12/dm-zoned-check-zone-capacity.patch
