Support bucket versioning (#9377)

- Implement a new xl.json 2.0.0 format to support,
  this moves the entire marshaling logic to POSIX
  layer, top layer always consumes a common FileInfo
  construct which simplifies the metadata reads.
- Implement list object versions
- Migrate to siphash from crchash for new deployments
  for object placements.

Fixes #2111

cmd/admin-handlers_test.go

@@ -33,27 +33,27 @@ import (
 	"github.com/minio/minio/pkg/madmin"
 )
 
-// adminXLTestBed - encapsulates subsystems that need to be setup for
+// adminErasureTestBed - encapsulates subsystems that need to be setup for
 // admin-handler unit tests.
-type adminXLTestBed struct {
-	xlDirs   []string
-	objLayer ObjectLayer
-	router   *mux.Router
+type adminErasureTestBed struct {
+	erasureDirs []string
+	objLayer    ObjectLayer
+	router      *mux.Router
 }
 
-// prepareAdminXLTestBed - helper function that setups a single-node
-// XL backend for admin-handler tests.
-func prepareAdminXLTestBed(ctx context.Context) (*adminXLTestBed, error) {
+// prepareAdminErasureTestBed - helper function that setups a single-node
+// Erasure backend for admin-handler tests.
+func prepareAdminErasureTestBed(ctx context.Context) (*adminErasureTestBed, error) {
 
 	// reset global variables to start afresh.
 	resetTestGlobals()
 
-	// Set globalIsXL to indicate that the setup uses an erasure
+	// Set globalIsErasure to indicate that the setup uses an erasure
 	// code backend.
-	globalIsXL = true
+	globalIsErasure = true
 
 	// Initializing objectLayer for HealFormatHandler.
-	objLayer, xlDirs, xlErr := initTestXLObjLayer(ctx)
+	objLayer, erasureDirs, xlErr := initTestErasureObjLayer(ctx)
 	if xlErr != nil {
 		return nil, xlErr
 	}
@@ -66,7 +66,7 @@ func prepareAdminXLTestBed(ctx context.Context) (*adminXLTestBed, error) {
 	// Initialize boot time
 	globalBootTime = UTCNow()
 
-	globalEndpoints = mustGetZoneEndpoints(xlDirs...)
+	globalEndpoints = mustGetZoneEndpoints(erasureDirs...)
 
 	newAllSubsystems()
 
@@ -76,36 +76,37 @@ func prepareAdminXLTestBed(ctx context.Context) (*adminXLTestBed, error) {
 	adminRouter := mux.NewRouter()
 	registerAdminRouter(adminRouter, true, true)
 
-	return &adminXLTestBed{
-		xlDirs:   xlDirs,
-		objLayer: objLayer,
-		router:   adminRouter,
+	return &adminErasureTestBed{
+		erasureDirs: erasureDirs,
+		objLayer:    objLayer,
+		router:      adminRouter,
 	}, nil
 }
 
 // TearDown - method that resets the test bed for subsequent unit
 // tests to start afresh.
-func (atb *adminXLTestBed) TearDown() {
-	removeRoots(atb.xlDirs)
+func (atb *adminErasureTestBed) TearDown() {
+	removeRoots(atb.erasureDirs)
 	resetTestGlobals()
 }
 
-// initTestObjLayer - Helper function to initialize an XL-based object
+// initTestObjLayer - Helper function to initialize an Erasure-based object
 // layer and set globalObjectAPI.
-func initTestXLObjLayer(ctx context.Context) (ObjectLayer, []string, error) {
-	xlDirs, err := getRandomDisks(16)
+func initTestErasureObjLayer(ctx context.Context) (ObjectLayer, []string, error) {
+	erasureDirs, err := getRandomDisks(16)
 	if err != nil {
 		return nil, nil, err
 	}
-	endpoints := mustGetNewEndpoints(xlDirs...)
-	storageDisks, format, err := waitForFormatXL(true, endpoints, 1, 1, 16, "")
+	endpoints := mustGetNewEndpoints(erasureDirs...)
+	storageDisks, format, err := waitForFormatErasure(true, endpoints, 1, 1, 16, "")
 	if err != nil {
-		removeRoots(xlDirs)
+		removeRoots(erasureDirs)
 		return nil, nil, err
 	}
 
 	globalPolicySys = NewPolicySys()
-	objLayer, err := newXLSets(ctx, endpoints, storageDisks, format)
+	objLayer := &erasureZones{zones: make([]*erasureSets, 1)}
+	objLayer.zones[0], err = newErasureSets(ctx, endpoints, storageDisks, format)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -114,7 +115,7 @@ func initTestXLObjLayer(ctx context.Context) (ObjectLayer, []string, error) {
 	globalObjLayerMutex.Lock()
 	globalObjectAPI = objLayer
 	globalObjLayerMutex.Unlock()
-	return objLayer, xlDirs, nil
+	return objLayer, erasureDirs, nil
 }
 
 // cmdType - Represents different service subcomands like status, stop
@@ -183,9 +184,9 @@ func testServicesCmdHandler(cmd cmdType, t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
-	adminTestBed, err := prepareAdminXLTestBed(ctx)
+	adminTestBed, err := prepareAdminErasureTestBed(ctx)
 	if err != nil {
-		t.Fatal("Failed to initialize a single node XL backend for admin handler tests.")
+		t.Fatal("Failed to initialize a single node Erasure backend for admin handler tests.")
 	}
 	defer adminTestBed.TearDown()
 
@@ -254,9 +255,9 @@ func TestAdminServerInfo(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
-	adminTestBed, err := prepareAdminXLTestBed(ctx)
+	adminTestBed, err := prepareAdminErasureTestBed(ctx)
 	if err != nil {
-		t.Fatal("Failed to initialize a single node XL backend for admin handler tests.")
+		t.Fatal("Failed to initialize a single node Erasure backend for admin handler tests.")
 	}
 
 	defer adminTestBed.TearDown()
@@ -298,7 +299,7 @@ func TestToAdminAPIErrCode(t *testing.T) {
 	}{
 		// 1. Server not in quorum.
 		{
-			err:            errXLWriteQuorum,
+			err:            errErasureWriteQuorum,
 			expectedAPIErr: ErrAdminConfigNoQuorum,
 		},
 		// 2. No error.