// value represents the entire byte range of an object.
type WarmBackendGetOpts struct {
	startOffset int64
	length      int64
}

// WarmBackend provides interface to be implemented by remote tier backends
type WarmBackend interface {
	Put(ctx context.Context, object string, r io.Reader, length int64) (remoteVersionID, error)
	Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (io.ReadCloser, error)

	}
}

// Benchmarks for ObjectLayer.PutObjectPart().
// The intent is to benchmark PutObjectPart for various sizes ranging from few bytes to 100MB.
// Also each of these Benchmarks are run both Erasure and FS backends.

// BenchmarkPutObjectPart5MbFS - Benchmark FS.PutObjectPart() for object size of 5MB.
func BenchmarkPutObjectPart5MbFS(b *testing.B) {
	benchmarkPutObjectPart(b, "FS", 5*humanize.MiByte)
}

Justin Griffin <******@****.***> 1709657048 -0500

Harshavardhana <******@****.***> 1713699798 -0700

// BackendType - represents different backend types.
type BackendType int

// Enum for different backend types.
const (
	Unknown = BackendType(madmin.Unknown)
	// Filesystem backend.
	BackendFS = BackendType(madmin.FS)
	// Multi disk BackendErasure (single, distributed) backend.
	BackendErasure = BackendType(madmin.Erasure)
	// Add your own backend.
)

		t.Fatal("Unexpected object layer detected", reflect.TypeOf(obj))
	}

	// Tests for Erasure object layer initialization.

	// Create temporary backend for the test server.
	nDisks = 16
	disks, err = getRandomDisks(nDisks)
	if err != nil {
		t.Fatal("Failed to create drives for the backend")
	}
	defer removeRoots(disks)

	obj, err = newObjectLayer(ctx, mustGetPoolEndpoints(0, disks...))
	if err != nil {

		t.Fatal(err)
	}

	if _, _, err = formatErasureMigrate(rootPath); err == nil {
		t.Fatal("Expected to fail with unexpected backend format")
	}

	m = &formatErasureV1{}
	m.Format = formatBackendErasure
	m.Version = formatMetaVersionV1
	m.Erasure.Version = "30"
	m.Erasure.Disk = mustGetUUID()

	return partKey
}

// SealETag seals the etag using the object key.
// It does not encrypt empty ETags because such ETags indicate
// that the S3 client hasn't sent an ETag = MD5(object) and
// the backend can pick an ETag value.
func (key ObjectKey) SealETag(etag []byte) []byte {
	if len(etag) == 0 { // don't encrypt empty ETag - only if client sent ETag = MD5(object)
		return etag
	}
	var buffer bytes.Buffer

	})
	return bucketName, f, nil
}

// prepare test backend.
// create FS/Erasure/ErasureSet backend.
// return object layer, backend disks.
func prepareTestBackend(ctx context.Context, instanceType string) (ObjectLayer, []string, error) {
	switch instanceType {
	// Total number of disks for Erasure sets backend is set to 32.
	case ErasureSetsTestStr:
		return prepareErasureSets32(ctx)

func TestListOnlineDisks(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	obj, disks, err := prepareErasure16(ctx)
	if err != nil {
		t.Fatalf("Prepare Erasure backend failed - %v", err)
	}
	setObjectLayer(obj)
	defer obj.Shutdown(context.Background())
	defer removeRoots(disks)

	type tamperKind int
	const (
		noTamper tamperKind = iota
		deletePart