Commit 1d68128c authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by David Sterba
Browse files

btrfs: zoned: fail mount if the device does not support zone append 



For zoned btrfs, zone append is mandatory to write to a sequential write
only zone, otherwise parallel writes to the same zone could result in
unaligned write errors.

If a zoned block device does not support zone append (e.g. a dm-crypt
zoned device using a non-NULL IV cypher), fail to mount.

CC: stable@vger.kernel.org # 5.12
Signed-off-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 061dde82

fs/btrfs/zoned.c

+7 −0
Original line number Diff line number Diff line
@@ -342,6 +342,13 @@ int btrfs_get_dev_zone_info(struct btrfs_device *device) 
	if (!IS_ALIGNED(nr_sectors, zone_sectors))

		zone_info->nr_zones++;



	if (bdev_is_zoned(bdev) && zone_info->max_zone_append_size == 0) {

		btrfs_err(fs_info, "zoned: device %pg does not support zone append",

			  bdev);

		ret = -EINVAL;

		goto out;

	}



	zone_info->seq_zones = bitmap_zalloc(zone_info->nr_zones, GFP_KERNEL);

	if (!zone_info->seq_zones) {

		ret = -ENOMEM;