[Rework of earlier patch to provide additional information in the response to an ATA identify request -- virtio_blk treats the data as opaque, content created by qemu's virtio-blk. Comments from Christoph also incorporated.] This patch allows passing of a virtio_blk drive serial number from qemu into a guest's virtio_blk driver, and provides a means to access the serial number from a guest's userspace. Equivalent functionality currently exists for IDE and SCSI, however it is not yet implemented for virtio. Scenarios exist where guest code relies on a unique drive serial number to correctly identify the machine environment in which it exists. The following two patches implement the above: qemu-vblk-serial-4.patch which provides the qemu missing bits to interpret a '-drive .. serial=XYZ ..' flag, and: virtio_blk-serial-4.patch which extracts this information and makes it available to guest userspace via an HDIO_GET_IDENTITY ioctl, eg: 'hdparm -i /dev/vda'. The above patches are relative to qemu-kvm.git and 2.6.29.3 respectively. -john -- john.cooper@xxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
