Add GetBootDeviceOverride support for redfish

bmc/boot_device.go

@@ -14,20 +14,35 @@ type BootDeviceSetter interface {
 	BootDeviceSet(ctx context.Context, bootDevice string, setPersistent, efiBoot bool) (ok bool, err error)
 }
 
+// BootDeviceOverrideGetter gets boot override settings for a machine
+type BootDeviceOverrideGetter interface {
+	BootDeviceOverrideGet(ctx context.Context) (override BootDeviceOverride, err error)
+}
+
 // bootDeviceProviders is an internal struct to correlate an implementation/provider and its name
 type bootDeviceProviders struct {
 	name             string
 	bootDeviceSetter BootDeviceSetter
 }
 
+// bootOverrideProvider is an internal struct to correlate an implementation/provider and its name
+type bootOverrideProvider struct {
+	name               string
+	bootOverrideGetter BootDeviceOverrideGetter
+}
+
+type BootDeviceOverride struct {
+	IsPersistent bool
+	IsEFIBoot    bool
+	Device       string
+}
+
 // setBootDevice sets the next boot device.
 //
 // setPersistent persists the next boot device.
 // efiBoot sets up the device to boot off UEFI instead of legacy.
 func setBootDevice(ctx context.Context, timeout time.Duration, bootDevice string, setPersistent, efiBoot bool, b []bootDeviceProviders) (ok bool, metadata Metadata, err error) {
-	metadataLocal := Metadata{
-		FailedProviderDetail: make(map[string]string),
-	}
+	metadataLocal := newMetadata()
 
 	for _, elem := range b {
 		if elem.bootDeviceSetter == nil {
@@ -78,3 +93,63 @@ func SetBootDeviceFromInterfaces(ctx context.Context, timeout time.Duration, boo
 	}
 	return setBootDevice(ctx, timeout, bootDevice, setPersistent, efiBoot, bdSetters)
 }
+
+// getBootDeviceOverride gets the boot device override settings for the given provider,
+// and updates the given metadata with provider attempts and errors.
+func getBootDeviceOverride(
+	ctx context.Context,
+	timeout time.Duration,
+	provider *bootOverrideProvider,
+	metadata *Metadata,
+) (override BootDeviceOverride, ok bool, err error) {
+	select {
+	case <-ctx.Done():
+		err = multierror.Append(err, ctx.Err())
+		return override, ok, err
+	default:
+		metadata.ProvidersAttempted = append(metadata.ProvidersAttempted, provider.name)
+		ctx, cancel := context.WithTimeout(ctx, timeout)
+		defer cancel()
+
+		override, err = provider.bootOverrideGetter.BootDeviceOverrideGet(ctx)
+		if err != nil {
+			metadata.FailedProviderDetail[provider.name] = err.Error()
+			return override, ok, nil
+		}
+
+		metadata.SuccessfulProvider = provider.name
+		return override, true, nil
+	}
+}
+
+// GetBootDeviceOverrideFromInterface will get boot device override settings from the first successful
+// call to a BootDeviceOverrideGetter in the array of providers.
+func GetBootDeviceOverrideFromInterface(
+	ctx context.Context,
+	timeout time.Duration,
+	providers []interface{},
+) (override BootDeviceOverride, metadata Metadata, err error) {
+	metadata = newMetadata()
+
+	for _, elem := range providers {
+		switch p := elem.(type) {
+		case BootDeviceOverrideGetter:
+			provider := &bootOverrideProvider{name: getProviderName(elem), bootOverrideGetter: p}
+			override, ok, getErr := getBootDeviceOverride(ctx, timeout, provider, &metadata)
+			if getErr != nil || ok {
+				return override, metadata, getErr
+			}
+		default:
+			e := fmt.Errorf("not a BootDeviceOverrideGetter implementation: %T", p)
+			err = multierror.Append(err, e)
+		}
+	}
+
+	if len(metadata.ProvidersAttempted) == 0 {
+		err = multierror.Append(err, errors.New("no BootDeviceOverrideGetter implementations found"))
+	} else {
+		err = multierror.Append(err, errors.New("failed to get boot device override settings"))
+	}
+
+	return override, metadata, err
+}

bmc/boot_device_test.go

@@ -6,8 +6,10 @@ import (
 	"testing"
 	"time"
 
+	"fmt"
 	"github.com/google/go-cmp/cmp"
 	"github.com/hashicorp/go-multierror"
+	"github.com/stretchr/testify/assert"
 )
 
 type bootDeviceTester struct {
@@ -117,3 +119,129 @@ func TestSetBootDeviceFromInterfaces(t *testing.T) {
 		})
 	}
 }
+
+type mockBootDeviceOverrideGetter struct {
+	overrideReturn BootDeviceOverride
+	errReturn      error
+}
+
+func (m *mockBootDeviceOverrideGetter) Name() string {
+	return "Mock"
+}
+
+func (m *mockBootDeviceOverrideGetter) BootDeviceOverrideGet(_ context.Context) (BootDeviceOverride, error) {
+	return m.overrideReturn, m.errReturn
+}
+
+func TestBootDeviceOverrideGet(t *testing.T) {
+	successOverride := BootDeviceOverride{
+		IsPersistent: false,
+		IsEFIBoot:    true,
+		Device:       "disk",
+	}
+
+	successMetadata := &Metadata{
+		SuccessfulProvider:   "Mock",
+		ProvidersAttempted:   []string{"Mock"},
+		SuccessfulOpenConns:  nil,
+		SuccessfulCloseConns: []string(nil),
+		FailedProviderDetail: map[string]string{},
+	}
+
+	mixedMetadata := &Metadata{
+		SuccessfulProvider:   "Mock",
+		ProvidersAttempted:   []string{"Mock", "Mock"},
+		SuccessfulOpenConns:  nil,
+		SuccessfulCloseConns: []string(nil),
+		FailedProviderDetail: map[string]string{"Mock": "foo-failure"},
+	}
+
+	failMetadata := &Metadata{
+		SuccessfulProvider:   "",
+		ProvidersAttempted:   []string{"Mock"},
+		SuccessfulOpenConns:  nil,
+		SuccessfulCloseConns: []string(nil),
+		FailedProviderDetail: map[string]string{"Mock": "foo-failure"},
+	}
+
+	emptyMetadata := &Metadata{
+		FailedProviderDetail: make(map[string]string),
+	}
+
+	testCases := []struct {
+		name               string
+		hasCanceledContext bool
+		expectedErrorMsg   string
+		expectedMetadata   *Metadata
+		expectedOverride   BootDeviceOverride
+		getters            []interface{}
+	}{
+		{
+			name:             "success",
+			expectedMetadata: successMetadata,
+			expectedOverride: successOverride,
+			getters: []interface{}{
+				&mockBootDeviceOverrideGetter{overrideReturn: successOverride},
+			},
+		},
+		{
+			name:             "multiple getters",
+			expectedMetadata: mixedMetadata,
+			expectedOverride: successOverride,
+			getters: []interface{}{
+				"not a getter",
+				&mockBootDeviceOverrideGetter{errReturn: fmt.Errorf("foo-failure")},
+				&mockBootDeviceOverrideGetter{overrideReturn: successOverride},
+			},
+		},
+		{
+			name:             "error",
+			expectedMetadata: failMetadata,
+			expectedErrorMsg: "failed to get boot device override settings",
+			getters: []interface{}{
+				&mockBootDeviceOverrideGetter{errReturn: fmt.Errorf("foo-failure")},
+			},
+		},
+		{
+			name:             "nil BootDeviceOverrideGetters",
+			expectedMetadata: emptyMetadata,
+			expectedErrorMsg: "no BootDeviceOverrideGetter implementations found",
+		},
+		{
+			name:             "nil BootDeviceOverrideGetter",
+			expectedMetadata: emptyMetadata,
+			expectedErrorMsg: "no BootDeviceOverrideGetter implementations found",
+			getters:          []interface{}{nil},
+		},
+		{
+			name:               "with canceled context",
+			hasCanceledContext: true,
+			expectedMetadata:   emptyMetadata,
+			expectedErrorMsg:   "context canceled",
+			getters: []interface{}{
+				&mockBootDeviceOverrideGetter{},
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			ctx, cancel := context.WithCancel(context.Background())
+			defer cancel()
+
+			if testCase.hasCanceledContext {
+				cancel()
+			}
+
+			override, metadata, err := GetBootDeviceOverrideFromInterface(ctx, 0, testCase.getters)
+
+			if testCase.expectedErrorMsg != "" {
+				assert.ErrorContains(t, err, testCase.expectedErrorMsg)
+			} else {
+				assert.Nil(t, err)
+			}
+			assert.Equal(t, testCase.expectedOverride, override)
+			assert.Equal(t, testCase.expectedMetadata, &metadata)
+		})
+	}
+}

client.go

@@ -455,6 +455,17 @@
 	return users, err
 }
 
+// GetBootDeviceOverride pass through to library function
+func (c *Client) GetBootDeviceOverride(ctx context.Context) (override bmc.BootDeviceOverride, err error) {
+	ctx, span := c.traceprovider.Tracer(pkgName).Start(ctx, "GetBootDeviceOverride")
+	defer span.End()
+
+	override, metadata, err := bmc.GetBootDeviceOverrideFromInterface(ctx, c.perProviderTimeout(ctx), c.registry().GetDriverInterfaces())
+	c.setMetadata(metadata)
+
+	return override, err
+}
+
 // SetBootDevice pass through to library function
 func (c *Client) SetBootDevice(ctx context.Context, bootDevice string, setPersistent, efiBoot bool) (ok bool, err error) {
 	ctx, span := c.traceprovider.Tracer(pkgName).Start(ctx, "SetBootDevice")

errors/errors.go

@@ -117,6 +117,9 @@ var (
 
 	// ErrSystemVendorModel is returned when the system vendor, model attributes could not be identified.
 	ErrSystemVendorModel = errors.New("error identifying system vendor, model attributes")
+
+	// ErrRedfishNoSystems is returned when the API of the device provides and empty array of systems.
+	ErrRedfishNoSystems = errors.New("redfish: no Systems were found on the device")
 )
 
 type ErrUnsupportedHardware struct {