Wrong total HD space displayed by Gnome control center when using BTRFS

[Swâmi Petaramesh]

When using BTRFS with several mounted BTRFS subvols from the same BTRFS volume, gnome-control-center adds the total space of all mountpoints, where they in fact share the same HD space.

So the amount of total HD space displayed by gnome-control-center is several time bigger than the actual value (actual value mutiplied by the number of mounted subvols).

This bug is probably related with bug #1043296

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gnome-control-center 1:3.4.2-0ubuntu13
ProcVersionSignature: Ubuntu 3.5.0-13.13-generic 3.5.3
Uname: Linux 3.5.0-13-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.5.1-0ubuntu3
Architecture: amd64
CheckboxSubmission: 1ea6109db29b53f721a523a77b7f3abf
CheckboxSystem: d00f84de8a555815fa1c4660280da308
Date: Wed Aug 29 14:59:59 2012
EcryptfsInUse: Yes
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to quantal on 2012-08-28 (1 days ago)
usr_lib_gnome-control-center:
 activity-log-manager-control-center 0.9.4-0ubuntu3
 deja-dup 23.90-0ubuntu1
 gnome-control-center-signon 0.0.13-0ubuntu1
 indicator-datetime 12.10.0-0ubuntu1