Allow metadata updates on meta bucket even in WORM mode (#8657)

This ensures that we can update the

- .minio.sys is updated for accounting/data usage purposes
- .minio.sys is updated to indicate if backend is encrypted
  or not.

cmd/data-usage.go

@@ -68,13 +68,7 @@ func runDataUsageInfoForFS(ctx context.Context, fsObj *FSObjects, endCh <-chan s
 		// Save the data usage in the disk
 		err := storeDataUsageInBackend(ctx, fsObj, usageInfo)
 		if err != nil {
-			if globalWORMEnabled {
-				if _, ok := err.(ObjectAlreadyExists); !ok {
-					logger.LogIf(ctx, err)
-				}
-			} else {
-				logger.LogIf(ctx, err)
-			}
+			logger.LogIf(ctx, err)
 		}
 		select {
 		case <-endCh:
@@ -103,13 +97,7 @@ func runDataUsageInfoForXLZones(ctx context.Context, z *xlZones, endCh <-chan st
 		usageInfo := z.crawlAndGetDataUsage(ctx, endCh)
 		err := storeDataUsageInBackend(ctx, z, usageInfo)
 		if err != nil {
-			if globalWORMEnabled {
-				if _, ok := err.(ObjectAlreadyExists); !ok {
-					logger.LogIf(ctx, err)
-				}
-			} else {
-				logger.LogIf(ctx, err)
-			}
+			logger.LogIf(ctx, err)
 		}
 		select {
 		case <-endCh:

cmd/disk-usage.go

@@ -1,54 +0,0 @@
-/*
- * MinIO Cloud Storage, (C) 2018 MinIO, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"context"
-)
-
-// getDiskUsage walks the file tree rooted at root, calling usageFn
-// for each file or directory in the tree, including root.
-func getDiskUsage(ctx context.Context, root string, usageFn usageFunc) error {
-	return walk(ctx, root+SlashSeparator, usageFn)
-}
-
-type usageFunc func(ctx context.Context, entry string) error
-
-// walk recursively descends path, calling walkFn.
-func walk(ctx context.Context, path string, usageFn usageFunc) error {
-	if err := usageFn(ctx, path); err != nil {
-		return err
-	}
-
-	if !HasSuffix(path, SlashSeparator) {
-		return nil
-	}
-
-	entries, err := readDir(path)
-	if err != nil {
-		return usageFn(ctx, path)
-	}
-
-	for _, entry := range entries {
-		fname := pathJoin(path, entry)
-		if err = walk(ctx, fname, usageFn); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}

cmd/fs-v1-multipart.go

@@ -683,7 +683,7 @@ func (fs *FSObjects) CompleteMultipartUpload(ctx context.Context, bucket string,
 	}
 
 	// Deny if WORM is enabled
-	if globalWORMEnabled {
+	if _, ok := isWORMEnabled(bucket); ok {
 		if _, err := fsStatFile(ctx, pathJoin(fs.fsPath, bucket, object)); err == nil {
 			return ObjectInfo{}, ObjectAlreadyExists{Bucket: bucket, Object: object}
 		}

cmd/fs-v1.go

@@ -1022,7 +1022,7 @@ func (fs *FSObjects) putObject(ctx context.Context, bucket string, object string
 	// Entire object was written to the temp location, now it's safe to rename it to the actual location.
 	fsNSObjPath := pathJoin(fs.fsPath, bucket, object)
 	// Deny if WORM is enabled
-	if globalWORMEnabled {
+	if _, ok := isWORMEnabled(bucket); ok {
 		if _, err := fsStatFile(ctx, fsNSObjPath); err == nil {
 			return ObjectInfo{}, ObjectAlreadyExists{Bucket: bucket, Object: object}
 		}

cmd/globals.go

@@ -266,7 +266,6 @@ var (
 // list. Feel free to add new relevant fields.
 func getGlobalInfo() (globalInfo map[string]interface{}) {
 	globalInfo = map[string]interface{}{
-		"isWorm":       globalWORMEnabled,
 		"serverRegion": globalServerRegion,
 		// Add more relevant global settings here.
 	}

cmd/server-main.go

@@ -206,15 +206,7 @@ func initSafeMode(buckets []BucketInfo) (err error) {
 	// Migrate all backend configs to encrypted backend configs, optionally
 	// handles rotating keys for encryption.
 	if err = handleEncryptedConfigBackend(newObject, true); err != nil {
-		if globalWORMEnabled {
-			if _, ok := err.(ObjectAlreadyExists); !ok {
-				return fmt.Errorf("Unable to handle encrypted backend for config, iam and policies: %w",
-					err)
-			}
-			// Ignore ObjectAlreadyExists if globalWORMEnabled is true.
-		} else {
-			return fmt.Errorf("Unable to handle encrypted backend for config, iam and policies: %w", err)
-		}
+		return fmt.Errorf("Unable to handle encrypted backend for config, iam and policies: %w", err)
 	}
 
 	// ****  WARNING ****

cmd/utils.go

@@ -540,6 +540,9 @@ func iamPolicyName() string {
 }
 
 func isWORMEnabled(bucket string) (Retention, bool) {
+	if isMinioMetaBucketName(bucket) {
+		return Retention{}, false
+	}
 	if globalWORMEnabled {
 		return Retention{}, true
 	}

cmd/xl-v1-multipart.go

@@ -708,7 +708,7 @@ func (xl xlObjects) CompleteMultipartUpload(ctx context.Context, bucket string,
 
 	if xl.isObject(bucket, object) {
 		// Deny if WORM is enabled
-		if globalWORMEnabled {
+		if _, ok := isWORMEnabled(bucket); ok {
 			if _, err := xl.getObjectInfo(ctx, bucket, object); err == nil {
 				return ObjectInfo{}, ObjectAlreadyExists{Bucket: bucket, Object: object}
 			}

cmd/xl-v1-object.go

@@ -611,7 +611,7 @@ func (xl xlObjects) putObject(ctx context.Context, bucket string, object string,
 
 	if xl.isObject(bucket, object) {
 		// Deny if WORM is enabled
-		if globalWORMEnabled {
+		if _, ok := isWORMEnabled(bucket); ok {
 			if _, err := xl.getObjectInfo(ctx, bucket, object); err == nil {
 				return ObjectInfo{}, ObjectAlreadyExists{Bucket: bucket, Object: object}
 			}