[Libguestfs] [PATCH v3 10/11] launch: Add a virtio-rng device to the guest.

--- src/launch-direct.c | 11 +++++++++++ src/launch-libvirt.c | 14 ++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/src/launch-direct.c b/src/launch-direct.c index d0af04d..52badc2 100644 --- a/src/launch-direct.c +++ b/src/launch-direct.c @@ -451,6 +451,17 @@ launch_direct (guestfs_h *g, void *datav, const char *arg) ADD_CMDLINE ("-initrd"); ADD_CMDLINE (initrd); + /* Add a random number generator (backend for virtio-rng). This + * isn't strictly necessary but means we won't need to hang around + * when needing entropy. + */ + if (qemu_supports_device (g, data, "virtio-rng-pci")) { + ADD_CMDLINE ("-object"); + ADD_CMDLINE ("rng-random,filename=/dev/urandom,id=rng0"); + ADD_CMDLINE ("-device"); + ADD_CMDLINE ("virtio-rng-pci,rng=rng0"); + } + /* Add drives */ virtio_scsi = qemu_supports_virtio_scsi (g, data); diff --git a/src/launch-libvirt.c b/src/launch-libvirt.c index 9f2672d..c6cc740 100644 --- a/src/launch-libvirt.c +++ b/src/launch-libvirt.c @@ -1251,6 +1251,20 @@ construct_libvirt_xml_devices (guestfs_h *g, } #endif + /* Add a random number generator (backend for virtio-rng). */ + start_element ("rng") { + attribute ("model", "virtio"); + start_element ("backend") { + attribute ("model", "random"); + /* It'd be nice to do this, but libvirt says: + * file '/dev/urandom' is not a supported random source + * Let libvirt pick /dev/random automatically instead. + * See also: https://bugzilla.redhat.com/show_bug.cgi?id=1074464 + */ + //string ("/dev/urandom"); + } end_element (); + } end_element (); + /* virtio-scsi controller. */ start_element ("controller") { attribute ("type", "scsi"); -- 2.7.4