fmorg-git commented on code in PR #9894:
URL: https://github.com/apache/ozone/pull/9894#discussion_r2963837435


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hadoop-ozone/client/src/main/java/org/apache/hadoop/ozone/client/protocol/ListStatusLightOptions.java:
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@@ -0,0 +1,182 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.hadoop.ozone.client.protocol;
+
+import java.util.Objects;
+
+/**
+ * Options for {@link ClientProtocol#listStatusLight(ListStatusLightOptions)}.
+ * Encapsulates all parameters to allow future extensibility without breaking
+ * the method signature.
+ */
+public final class ListStatusLightOptions {
+
+  private final String volumeName;
+  private final String bucketName;
+  private final String keyName;
+  private final boolean recursive;
+  private final String startKey;
+  private final long numEntries;
+  private final boolean allowPartialPrefixes;
+  // When keyName is empty (root listing), this is the original S3/list
+  // prefix for STS auth. Enables LIST check on this prefix instead of "*".
+  private final String listPrefix;

Review Comment:
   `listPrefix` is introduced solely as a means to pass the user's requested 
prefix down to the OM for STS authorization so we can check if user has 
permission on that prefix rather than the entire bucket.  `keyName` and 
`listPrefix` shouldn't both be non-empty - indeed `listPrefix` is only set if 
`keyName` is empty (ex. root listing "").  Also, `keyName` shouldn't be set to 
`listPrefix` if it is empty because it would mess up the listing logic.
   
   The next PR gives more details on how they relate: 
https://github.com/fmorg-git/ozone/blob/a91adf822ac918a2d616138828724972cd35f6c4/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OmMetadataReader.java#L237-L253



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