On Tue, Jul 07, 2020 at 21:46:30 +0200, Michal Privoznik wrote: > This callback is called when the server sends us STREAM_HOLE > meaning there is no real data, only zeroes. For regular files > we would just seek() beyond EOF and ftruncate() to create the > hole. But for block devices this won't work. Not only we can't > seek() beyond EOF, and ftruncate() will fail, this approach won't > fill the device with zeroes. We have to do it manually. > > Partially resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1852528 > > Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx> > --- > tools/virsh-util.c | 30 ++++++++++++++++++++++++++---- > 1 file changed, 26 insertions(+), 4 deletions(-) Reviewed-by: Peter Krempa <pkrempa@xxxxxxxxxx>
