qemu: Add argument to enable support for ceph rbd storage

pkgs/applications/virtualization/qemu/default.nix

@@ -14,6 +14,7 @@
 , spiceSupport ? !stdenv.isDarwin, spice, spice-protocol
 , usbredirSupport ? spiceSupport, usbredir
 , xenSupport ? false, xen
+, cephSupport ? false, ceph
 , openGLSupport ? sdlSupport, mesa_noglu, epoxy, libdrm
 , virglSupport ? openGLSupport, virglrenderer
 , smbdSupport ? false, samba
@@ -63,6 +64,7 @@ stdenv.mkDerivation rec {
     ++ optionals usbredirSupport [ usbredir ]
     ++ optionals stdenv.isLinux [ alsaLib libaio libcap_ng libcap attr ]
     ++ optionals xenSupport [ xen ]
+    ++ optionals cephSupport [ ceph ]
     ++ optionals openGLSupport [ mesa_noglu epoxy libdrm ]
     ++ optionals virglSupport [ virglrenderer ]
     ++ optionals smbdSupport [ samba ];
@@ -117,6 +119,7 @@ stdenv.mkDerivation rec {
     ++ optional stdenv.isLinux "--enable-linux-aio"
     ++ optional gtkSupport "--enable-gtk"
     ++ optional xenSupport "--enable-xen"
+    ++ optional cephSupport "--enable-rbd"
     ++ optional openGLSupport "--enable-opengl"
     ++ optional virglSupport "--enable-virglrenderer"
     ++ optional smbdSupport "--smbd=${samba}/bin/smbd";