4.18-stable review patch. If anyone has any objections, please let me know.
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From: Anand Jain anand.jain@oracle.com
[ Upstream commit b4993e64f78a9605b45252fa9ba385c88a1f4ce9 ]
In case of deleting the seed device the %cur_devices (seed) and the %fs_devices (parent) are different. Now, as the parent fs_devices::total_devices also maintains the total number of devices including the seed device, so decrement its in-memory value for the successful seed delete. We are already updating its corresponding on-disk btrfs_super_block::number_devices value.
Signed-off-by: Anand Jain anand.jain@oracle.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/volumes.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -2029,6 +2029,9 @@ int btrfs_rm_device(struct btrfs_fs_info
cur_devices->num_devices--; cur_devices->total_devices--; + /* Update total_devices of the parent fs_devices if it's seed */ + if (cur_devices != fs_devices) + fs_devices->total_devices--;
if (test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state)) cur_devices->missing_devices--;