szetszwo commented on a change in pull request #2352: URL: https://github.com/apache/hadoop/pull/2352#discussion_r497449607
########## File path: hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java ########## @@ -2901,6 +2945,74 @@ private void provisionEZTrash(String path, FsPermission trashPermission) setPermission(trashPath, trashPermission); } + /** + * HDFS only. + * + * Provision snapshottable directory trash. + * @param path Path to a snapshottable directory. + * @param trashPermission Expected FsPermission of the trash root. + * @throws IOException + */ + public void provisionSnapshottableDirTrash(final Path path, + final FsPermission trashPermission) throws IOException { + Path absF = fixRelativePart(path); + new FileSystemLinkResolver<Void>() { + @Override + public Void doCall(Path p) throws IOException { + provisionSnapshottableDirTrash(getPathName(p), trashPermission); + return null; + } + + @Override + public Void next(FileSystem fs, Path p) throws IOException { + if (fs instanceof DistributedFileSystem) { + DistributedFileSystem myDfs = (DistributedFileSystem)fs; + myDfs.provisionSnapshottableDirTrash(p, trashPermission); + return null; + } + throw new UnsupportedOperationException( + "Cannot provisionSnapshottableDirTrash through a symlink to" + + " a non-DistributedFileSystem: " + fs + " -> " + p); + } + }.resolve(this, absF); + } + + private void provisionSnapshottableDirTrash( + String pathStr, FsPermission trashPermission) throws IOException { + Path path = new Path(pathStr); Review comment: Should isSnapshotTrashRootEnabled be checked here? If isSnapshotTrashRootEnabled == false, all the provisionSnapshottableDirTrash calls should fail. ########## File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java ########## @@ -1245,6 +1265,10 @@ private void printHelp(String cmd) { String disallowSnapshot = "-disallowSnapshot <snapshotDir>:\n" + "\tDo not allow snapshots to be taken on a directory any more.\n"; + String provisionSnapshotTrash = "-provisionSnapshotTrash <snapshotDir>:\n" + + "\tProvision trash root in a snapshottable directory with permission" + + "\t777 and sticky bit.\n"; Review comment: Use the constant HdfsAdmin.TRASH_PERMISSION instead of harding coding it. ########## File path: hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java ########## @@ -2901,6 +2945,74 @@ private void provisionEZTrash(String path, FsPermission trashPermission) setPermission(trashPath, trashPermission); } + /** + * HDFS only. + * + * Provision snapshottable directory trash. + * @param path Path to a snapshottable directory. + * @param trashPermission Expected FsPermission of the trash root. + * @throws IOException + */ + public void provisionSnapshottableDirTrash(final Path path, Review comment: Return the trash path. ########## File path: hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java ########## @@ -782,14 +784,32 @@ public void allowSnapshot(String[] argv) throws IOException { */ public void disallowSnapshot(String[] argv) throws IOException { Path p = new Path(argv[1]); - final DistributedFileSystem dfs = AdminHelper.getDFS(p.toUri(), getConf()); + final HdfsAdmin admin = new HdfsAdmin(p.toUri(), getConf()); try { - dfs.disallowSnapshot(p); + admin.disallowSnapshot(p); } catch (SnapshotException e) { throw new RemoteException(e.getClass().getName(), e.getMessage()); } System.out.println("Disallowing snapshot on " + argv[1] + " succeeded"); } + + /** + * Provision trash root in a snapshottable directory. + * Usage: hdfs dfsadmin -provisionSnapshotTrash snapshotDir + * @param argv List of of command line parameters. + * @exception IOException + */ + public void provisionSnapshotTrash(String[] argv) throws IOException { + Path p = new Path(argv[1]); + final HdfsAdmin admin = new HdfsAdmin(p.toUri(), getConf()); + try { + admin.provisionSnapshottableDirTrash(p); + } catch (SnapshotException e) { + throw new RemoteException(e.getClass().getName(), e.getMessage()); + } + System.out.println("Provision of snapshot trash in " + argv[1] + Review comment: Print out the trash path. ########## File path: hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DistributedFileSystem.java ########## @@ -2901,6 +2945,74 @@ private void provisionEZTrash(String path, FsPermission trashPermission) setPermission(trashPath, trashPermission); } + /** + * HDFS only. + * + * Provision snapshottable directory trash. + * @param path Path to a snapshottable directory. + * @param trashPermission Expected FsPermission of the trash root. + * @throws IOException + */ + public void provisionSnapshottableDirTrash(final Path path, + final FsPermission trashPermission) throws IOException { + Path absF = fixRelativePart(path); + new FileSystemLinkResolver<Void>() { + @Override + public Void doCall(Path p) throws IOException { + provisionSnapshottableDirTrash(getPathName(p), trashPermission); + return null; + } + + @Override + public Void next(FileSystem fs, Path p) throws IOException { + if (fs instanceof DistributedFileSystem) { + DistributedFileSystem myDfs = (DistributedFileSystem)fs; + myDfs.provisionSnapshottableDirTrash(p, trashPermission); + return null; + } + throw new UnsupportedOperationException( + "Cannot provisionSnapshottableDirTrash through a symlink to" + + " a non-DistributedFileSystem: " + fs + " -> " + p); + } + }.resolve(this, absF); + } + + private void provisionSnapshottableDirTrash( Review comment: Return the trash path. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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