https://bugzilla.redhat.com/show_bug.cgi?id=1984938
The purpose of the patch is explained in the commit message / bug. In the cover I want to explain a couple of design choices. If libselinux isn't available at build time then the --selinux-label option is still present. It does not appear in the qemu-nbd --help output. If you still use it, it is ignored. (By contrast nbdkit will give an error if you try to use the option without having SELinux support. It's not clear which is better.) We give an error if setsockcreatecon_raw fails. In theory we could ignore this error (warning?) and keep going. Either SELinux would later reject clients or it wouldn't. Rich.
