Use sriovnet provider to get PF name if PF is in switchdev mode

Signed-off-by: Alexander Maslennikov <[email protected]>

pkg/utils/utils.go

@@ -23,6 +23,8 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+
+	"github.com/golang/glog"
 )
 
 var (
@@ -31,8 +33,9 @@ var (
 )
 
 const (
-	totalVfFile      = "sriov_totalvfs"
-	configuredVfFile = "sriov_numvfs"
+	totalVfFile          = "sriov_totalvfs"
+	configuredVfFile     = "sriov_numvfs"
+	eswitchModeSwitchdev = "switchdev"
 )
 
 // DetectPluginWatchMode returns true if plugins registry directory exist
@@ -60,6 +63,30 @@ func GetPfAddr(pciAddr string) (string, error) {
 // GetPfName returns SRIOV PF name for the given VF
 // If device is not VF then it will return its own ifname if exist else empty string
 func GetPfName(pciAddr string) (string, error) {
+	pfEswitchMode, err := GetPfEswitchMode(pciAddr)
+	if err != nil {
+		errString := strings.ToLower(fmt.Sprint(err))
+		// If device doesn't support eswitch mode query or doesn't have sriov enabled,
+		// fall back to the default implementation
+		if strings.Contains(errString, "no such device") || strings.Contains(errString, "operation not supported") {
+			glog.Infof("Devlink query for eswitch mode is not supported for device %s. %v", pciAddr, err)
+		} else {
+			return "", err
+		}
+	}
+
+	if pfEswitchMode == "" {
+		glog.Warningf("Failed to retrieve eswitch mode with devlink query for device %s", pciAddr)
+	} else if pfEswitchMode == eswitchModeSwitchdev {
+		name, err := GetSriovnetProvider().GetUplinkRepresentor(pciAddr)
+
+		if err != nil {
+			return "", err
+		}
+
+		return name, nil
+	}
+
 	path := filepath.Join(sysBusPci, pciAddr, "physfn", "net")
 	files, err := ioutil.ReadDir(path)
 	if err != nil {
@@ -393,3 +420,17 @@ func GetVFID(pciAddr string) (vfID int, err error) {
 	vfID = -1
 	return vfID, nil
 }
+
+// GetPfEswitchMode returns PF's eswitch mode for the given VF
+// If device is not VF then it will return its own eswitch mode
+func GetPfEswitchMode(pciAddr string) (string, error) {
+	pfAddr, err := GetPfAddr(pciAddr)
+	if err != nil {
+		return "", fmt.Errorf("error getting PF PCI address for device %s %v", pciAddr, err)
+	}
+	devLinkDeviceAttrs, err := GetNetlinkProvider().GetDevLinkDeviceEswitchAttrs(pfAddr)
+	if err != nil {
+		return "", err
+	}
+	return devLinkDeviceAttrs.Mode, nil
+}

pkg/utils/utils_test.go

@@ -1,9 +1,15 @@
 package utils
 
 import (
+	"fmt"
+
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/ginkgo/extensions/table"
 	. "github.com/onsi/gomega"
+	"github.com/stretchr/testify/mock"
+	nl "github.com/vishvananda/netlink"
+
+	mocks "github.com/k8snetworkplumbingwg/sriov-network-device-plugin/pkg/utils/mocks"
 )
 
 func assertShouldFail(err error, shouldFail bool) {
@@ -395,17 +401,31 @@ var _ = Describe("In the utils package", func() {
 		),
 	)
 
-	DescribeTable("getting PF names",
+	DescribeTable("getting PF names legacy",
 		func(fs *FakeFilesystem, device string, expected string, shouldFail bool) {
+			fakeNetlinkProvider := mocks.NetlinkProvider{}
+			fakeNetlinkProvider.
+				On("GetDevLinkDeviceEswitchAttrs",
+					mock.AnythingOfType("string")).
+				Return(&nl.DevlinkDevEswitchAttr{Mode: "legacy"}, nil)
+			SetNetlinkProviderInst(&fakeNetlinkProvider)
+
 			defer fs.Use()()
 			actual, err := GetPfName(device)
 			Expect(actual).To(Equal(expected))
 			assertShouldFail(err, shouldFail)
 		},
 		Entry("device doesn't exist", &FakeFilesystem{}, "0000:01:10.0", nil, true),
 		Entry("device is a VF and interface name exists",
-			&FakeFilesystem{Dirs: []string{"sys/bus/pci/devices/0000:01:10.0/physfn/net/fakePF"}},
-			"0000:01:10.0", "fakePF", false,
+			&FakeFilesystem{
+				Dirs: []string{
+					"sys/bus/pci/devices/0000:01:10.0",
+					"sys/bus/pci/devices/0000:01:00.0/net/fakePF",
+				},
+				Symlinks: map[string]string{
+					"sys/bus/pci/devices/0000:01:10.0/physfn/": "../0000:01:00.0",
+				},
+			}, "0000:01:10.0", "fakePF", false,
 		),
 		Entry("device is a VF and interface name does not exist",
 			&FakeFilesystem{Dirs: []string{"sys/bus/pci/devices/0000:01:10.0/physfn/net/"}},
@@ -428,6 +448,66 @@ var _ = Describe("In the utils package", func() {
 		),
 	)
 
+	DescribeTable("getting PF names switchdev",
+		func(fs *FakeFilesystem, device string, expected string, shouldFail bool) {
+			fakeNetlinkProvider := mocks.NetlinkProvider{}
+			fakeNetlinkProvider.
+				On("GetDevLinkDeviceEswitchAttrs", "devlinkDeviceSwitchdev").
+				Return(&nl.DevlinkDevEswitchAttr{Mode: "switchdev"}, nil).
+				On("GetDevLinkDeviceEswitchAttrs", "nonDevlinkDevice").
+				Return(nil, fmt.Errorf("devlink error: no such device")).
+				On("GetDevLinkDeviceEswitchAttrs", "nonSriovDevice").
+				Return(nil, fmt.Errorf("devlink error: operation not supported")).
+				On("GetDevLinkDeviceEswitchAttrs", "unknownDevice").
+				Return(nil, fmt.Errorf("unknown error"))
+			SetNetlinkProviderInst(&fakeNetlinkProvider)
+
+			fakeSriovnetProvider := mocks.SriovnetProvider{}
+			fakeSriovnetProvider.
+				On("GetUplinkRepresentor", mock.AnythingOfType("string")).
+				Return("fakeSwitchdevPF", nil)
+			SetSriovnetProviderInst(&fakeSriovnetProvider)
+
+			defer fs.Use()()
+			actual, err := GetPfName(device)
+			Expect(actual).To(Equal(expected))
+			assertShouldFail(err, shouldFail)
+		},
+		Entry("device is a VF and PF is in switchdev mode",
+			&FakeFilesystem{
+				Dirs: []string{
+					"sys/bus/pci/devices/0000:01:10.0",
+					"sys/bus/pci/devices/devlinkDeviceSwitchdev/net/fakePF",
+					"sys/bus/pci/devices/devlinkDeviceSwitchdev/net/fakeVF",
+				},
+				Symlinks: map[string]string{
+					"sys/bus/pci/devices/0000:01:10.0/physfn/": "../devlinkDeviceSwitchdev",
+				},
+			},
+			"0000:01:10.0", "fakeSwitchdevPF", false,
+		),
+		Entry("device is a PF in switchdev mode",
+			&FakeFilesystem{
+				Dirs: []string{
+					"sys/bus/pci/devices/devlinkDeviceSwitchdev/net/fakePF",
+				},
+			},
+			"devlinkDeviceSwitchdev", "fakeSwitchdevPF", false,
+		),
+		Entry("device is a PF and doesn't support eswitch mode query",
+			&FakeFilesystem{Dirs: []string{"sys/bus/pci/devices/nonDevlinkDevice/net/fakeIF"}},
+			"nonDevlinkDevice", "fakeIF", false,
+		),
+		Entry("device is a PF and doesn't support eswitch mode query",
+			&FakeFilesystem{Dirs: []string{"sys/bus/pci/devices/nonSriovDevice/net/fakeIF"}},
+			"nonSriovDevice", "fakeIF", false,
+		),
+		Entry("device is a PF and eswitch query failed",
+			&FakeFilesystem{Dirs: []string{"sys/bus/pci/devices/unknownDevice/net/fakeIF"}},
+			"unknownDevice", "", true,
+		),
+	)
+
 	DescribeTable("getting ID of VF",
 		func(fs *FakeFilesystem, device string, expected int, shouldFail bool) {
 			defer fs.Use()()