tree f210c9e347318a954dec2e7a4d367f76ebf0da9e
parent 800ee2247f483b6d05ed47ef3bbc90b56451746c
author David Sterba <dsterba@suse.cz> 1391780052 +0100
committer Chris Mason <clm@fb.com> 1396892513 -0700

btrfs: export global block reserve size as space_info

Introduce a block group type bit for a global reserve and fill the space
info for SPACE_INFO ioctl. This should replace the newly added ioctl
(01e219e8069516cdb98594d417b8bb8d906ed30d) to get just the 'size' part
of the global reserve, while the actual usage can be now visible in the
'btrfs fi df' output during ENOSPC stress.

The unpatched userspace tools will show the blockgroup as 'unknown'.

CC: Jeff Mahoney <jeffm@suse.com>
CC: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>