[libvirt] [PATCH libvirt sparse files under format=qcow2 v1 0/2] Problem: libvirt fails to create fully allocated qcow2 storage objects.
From: Wim ten Have <wim.ten.have(a)oracle.com>
When virt-install requests to create fully allocated storage object when
the parameter sparse=no is set, 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.
Wim ten Have (2):
libvirt can't create fully allocated qcow2 formatted storage objects.
Adjust qemu-img test required to target with preallocation=falloc.
include/libvirt/libvirt-storage.h | 5 ++++-
src/storage/storage_util.c | 21 +++++++++++++++++----
.../qcow2-nocapacity-convert-prealloc.argv | 2 +-
3 files changed, 22 insertions(+), 6 deletions(-)
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2.14.3