Commit 35fec108 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by David Sterba
Browse files

btrfs: zoned: fix zone finishing with missing devices 



If do_zone_finish() is called with a filesystem that has missing devices
(e.g. a RAID file system mounted in degraded mode) it is accessing the
btrfs_device::zone_info pointer, which will not be set if the device
in question is missing.

Check if the device is present (by checking if it has a valid block device
pointer associated) and if not, skip zone finishing for it.

Fixes: 4dcbb8ab ("btrfs: zoned: make zone finishing multi stripe capable")
CC: stable@vger.kernel.org # 6.1+
Reviewed-by: default avatarNaohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: default avatarAnand Jain <anand.jain@oracle.com>
Signed-off-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 2bbc4a45

fs/btrfs/zoned.c

+3 −0
Original line number Diff line number Diff line
@@ -2275,6 +2275,9 @@ static int do_zone_finish(struct btrfs_block_group *block_group, bool fully_writ 
		struct btrfs_zoned_device_info *zinfo = device->zone_info;

		unsigned int nofs_flags;



		if (!device->bdev)

			continue;



		if (zinfo->max_active_zones == 0)

			continue;