apparmor: Enable passt support

passt provides an AppArmor abstraction that covers all the
inner details of its operation, so we can simply import that
and add the libvirt-specific parts on top: namely, passt
needs to be able to create a socket and pid file, while
the libvirt daemon needs to be able to kill passt.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

src/security/apparmor/libvirt-qemu

@@ -185,6 +185,21 @@
   /usr/{lib,lib64}/libswtpm_libtpms.so mr,
   /usr/lib/@{multiarch}/libswtpm_libtpms.so mr,
 
+  # support for passt network back-end
+  /usr/bin/passt Cx -> passt,
+
+  profile passt {
+    /usr/bin/passt r,
+
+    signal (receive) set=("term") peer=/usr/sbin/libvirtd,
+    signal (receive) set=("term") peer=libvirtd,
+    signal (receive) set=("term") peer=virtqemud,
+
+    owner /{,var/}run/libvirt/qemu/passt/* rw,
+
+    include if exists <abstractions/passt>
+  }
+
   # for save and resume
   /{usr/,}bin/dash rmix,
   /{usr/,}bin/dd rmix,