Re: [libvirt] [PATCH] Fix configuration of QEMU security drivers

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; If no 'security_driver' config option was set, then the code just loaded the 'dac' security driver. This is a regression on previous behaviour, where we would probe for a possible security driver. ie default to SELinux if available. This changes things so that it 'security_driver' is not set, we once again do probing. For simplicity we also always create the stack driver, even if there is only one driver active. The desired semantics are: - security_driver not set -> probe for selinux/apparmour/nop -> auto-add DAC driver - security_driver set to a string -> add that one driver -> auto-add DAC driver - security_driver set to a list -> add all drivers in list -> auto-add DAC driver It is not allowed, or possible to specify 'dac' in the security_driver config param, since that is always enabled.