Re: [PATCH v2 12/17] virshStreamSkip: Emulate skip for block devices

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(a)redhat.com&gt; --- tools/virsh-util.c | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-)