From: Wim ten Have <>

When tools like virt-install request to create a fully allocated
filesystem object storage by setting the parameter sparse=no, libvirt
doesn't allow that to happen for qcow2 formatted files.

Regardless of its XML instuction request libvirt always targets its
filesystem object storage with preallocation=metadata if format=qcow2
is in effect.  This results in sparse files which could cause problems
since total image storage potentially can overrun actual filesystem
available space.

Changes from v1:
* Fix XML target sparse setting and apply for qcow2.
* Bring the test change under same PATCH.

Wim ten Have (1):
  storage: extend preallocation flags support for qemu-img

 src/conf/storage_conf.c                                        |  3 +++
 src/storage/storage_util.c                                     | 10 ++++++++--
 .../qcow2-nocapacity-convert-prealloc.argv                     |  2 +-
 3 files changed, 12 insertions(+), 3 deletions(-)


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