vfio: Change the way the driver is fetched

Instead of using ethtool for getting the driver for network devices, use sysfs instead. This is because in case of virtio devices, ethtool returns virtio-net instead of virtio-pci for virtio network devices. We need to bind/unbind from virtio-pci driver in case of virtio-net devices. Fixes #612 Signed-off-by: Archana Shinde <[email protected]>
kata-containers · Oct 23, 2018 · 31cf6fb · 31cf6fb
1 parent 40ee885
commit 31cf6fb
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/virtcontainers/physical_endpoint.go b/virtcontainers/physical_endpoint.go
@@ -8,6 +8,7 @@ package virtcontainers
 import (
 	"fmt"
 	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -143,12 +144,15 @@ func createPhysicalEndpoint(netInfo NetworkInfo) (*PhysicalEndpoint, error) {
 		return nil, err
 	}
 
-	// Get Driver
-	driver, err := ethHandle.DriverName(netInfo.Iface.Name)
+	// Get driver by following symlink /sys/bus/pci/devices/$bdf/driver
+	driverPath := filepath.Join(sysPCIDevicesPath, bdf, "driver")
+	link, err := os.Readlink(driverPath)
 	if err != nil {
 		return nil, err
 	}
 
+	driver := filepath.Base(link)
+
 	// Get vendor and device id from pci space (sys/bus/pci/devices/$bdf)
 
 	ifaceDevicePath := filepath.Join(sysPCIDevicesPath, bdf, "device")