device: Assign pci address to block device for kata_agent

Store PCI address for a block device on hotplugging it via
virtio-blk. This address will be passed by kata agent in the
device "Id" field. The agent within the guest can then use this
to identify the PCI slot in the guest and create the device node
based on it.

Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>

virtcontainers/device.go

@@ -391,6 +391,7 @@ func (device *BlockDevice) attach(h hypervisor, c *Container) (err error) {
 
 	if c.sandbox.config.HypervisorConfig.BlockDeviceDriver == VirtioBlock {
 		device.VirtPath = filepath.Join("/dev", driveName)
+		device.PCIAddr = drive.PCIAddr
 	} else {
 		scsiAddr, err := getSCSIAddress(index)
 		if err != nil {

virtcontainers/kata_agent.go

@@ -629,7 +629,7 @@ func (k *kataAgent) appendDevices(deviceList []*grpc.Device, devices []Device) [
 
 		if d.SCSIAddr == "" {
 			kataDevice.Type = kataBlkDevType
-			kataDevice.VmPath = d.VirtPath
+			kataDevice.Id = d.PCIAddr
 		} else {
 			kataDevice.Type = kataSCSIDevType
 			kataDevice.Id = d.SCSIAddr

virtcontainers/kata_agent_test.go

@@ -24,9 +24,9 @@ import (
 )
 
 var (
-	testKataProxyURLTempl   = "unix://%s/kata-proxy-test.sock"
-	testBlockDeviceVirtPath = "testBlockDeviceVirtPath"
-	testBlockDeviceCtrPath  = "testBlockDeviceCtrPath"
+	testKataProxyURLTempl  = "unix://%s/kata-proxy-test.sock"
+	testBlockDeviceCtrPath = "testBlockDeviceCtrPath"
+	testPCIAddr            = "04/02"
 )
 
 func proxyHandlerDiscard(c net.Conn) {
@@ -366,16 +366,16 @@ func TestAppendDevices(t *testing.T) {
 	expected := []*pb.Device{
 		{
 			Type:          kataBlkDevType,
-			VmPath:        testBlockDeviceVirtPath,
 			ContainerPath: testBlockDeviceCtrPath,
+			Id:            testPCIAddr,
 		},
 	}
 	ctrDevices := []Device{
 		&BlockDevice{
-			VirtPath: testBlockDeviceVirtPath,
 			DeviceInfo: DeviceInfo{
 				ContainerPath: testBlockDeviceCtrPath,
 			},
+			PCIAddr: testPCIAddr,
 		},
 	}