Update madmin-go to 2.1.1 (#2810)

Update madmin-go library + github.com/minio/mc

Also update the code to work with the library update

Co-authored-by: Anis Elleuch <anis@min.io>

restapi/admin_info.go

@@ -73,34 +73,11 @@ func GetAdminInfo(ctx context.Context, client MinioAdmin) (*UsageInfo, error) {
 	// we are trimming uint64 to int64 this will report an incorrect measurement for numbers greater than
 	// 9,223,372,036,854,775,807
 
-	var backendType string
-	var rrSCParity float64
-	var standardSCParity float64
-	var onlineDrives float64
-	var offlineDrives float64
-
-	if v, success := serverInfo.Backend.(map[string]interface{}); success {
-		bt, ok := v["backendType"]
-		if ok {
-			backendType = bt.(string)
-		}
-		rp, ok := v["rrSCParity"]
-		if ok {
-			rrSCParity = rp.(float64)
-		}
-		sp, ok := v["standardSCParity"]
-		if ok {
-			standardSCParity = sp.(float64)
-		}
-		onDrives, ok := v["onlineDisks"]
-		if ok {
-			onlineDrives = onDrives.(float64)
-		}
-		offDrives, ok := v["offlineDisks"]
-		if ok {
-			offlineDrives = offDrives.(float64)
-		}
-	}
+	backendType := serverInfo.Backend.Type
+	rrSCParity := serverInfo.Backend.RRSCParity
+	standardSCParity := serverInfo.Backend.StandardSCParity
+	onlineDrives := serverInfo.Backend.OnlineDisks
+	offlineDrives := serverInfo.Backend.OfflineDisks
 
 	var usedSpace int64
 	// serverArray contains the serverProperties which describe the servers in the network
@@ -139,7 +116,7 @@ func GetAdminInfo(ctx context.Context, client MinioAdmin) (*UsageInfo, error) {
 	}
 
 	backendData := &models.BackendProperties{
-		BackendType:      backendType,
+		BackendType:      string(backendType),
 		RrSCParity:       int64(rrSCParity),
 		StandardSCParity: int64(standardSCParity),
 		OnlineDrives:     int64(onlineDrives),

restapi/admin_info_test.go

@@ -49,11 +49,7 @@ func (suite *AdminInfoTestSuite) SetupSuite() {
 			Servers: []madmin.ServerProperties{{
 				Disks: []madmin.Disk{{}},
 			}},
-			Backend: map[string]interface{}{
-				"backendType":      "mock",
-				"rrSCParity":       0.0,
-				"standardSCParity": 0.0,
-			},
+			Backend: madmin.ErasureBackend{Type: "mock"},
 		}, nil
 	}
 }