HADOOP-10187. add getfacl and setfacl with minimal support for getting and setting ACLs. Contributed by Vinay.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1553735 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Chris Nauroth
parent
839512aab7
commit
abe13d6ffb
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@ -69,4 +69,21 @@ public enum FsAction {
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public FsAction not() {
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return vals[7 - ordinal()];
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}
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/**
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* Get the FsAction enum for String representation of permissions
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*
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* @param permission
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* 3-character string representation of permission. ex: rwx
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* @return Returns FsAction enum if the corresponding FsAction exists for permission.
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* Otherwise returns null
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*/
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public static FsAction getFsAction(String permission) {
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for (FsAction fsAction : vals) {
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if (fsAction.SYMBOL.equals(permission)) {
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return fsAction;
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}
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}
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return null;
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}
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}
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@ -0,0 +1,232 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.fs.shell;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.LinkedList;
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import java.util.List;
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import org.apache.hadoop.HadoopIllegalArgumentException;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.fs.permission.AclEntry;
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import org.apache.hadoop.fs.permission.AclEntryScope;
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import org.apache.hadoop.fs.permission.AclEntryType;
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import org.apache.hadoop.fs.permission.AclStatus;
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import org.apache.hadoop.fs.permission.FsAction;
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import org.apache.hadoop.util.StringUtils;
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/**
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* Acl related operations
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*/
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@InterfaceAudience.Private
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@InterfaceStability.Evolving
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class AclCommands extends FsCommand {
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private static String GET_FACL = "getfacl";
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private static String SET_FACL = "setfacl";
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public static void registerCommands(CommandFactory factory) {
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factory.addClass(GetfaclCommand.class, "-" + GET_FACL);
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factory.addClass(SetfaclCommand.class, "-" + SET_FACL);
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}
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/**
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* Implementing the '-getfacl' command for the the FsShell.
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*/
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public static class GetfaclCommand extends FsCommand {
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public static String NAME = GET_FACL;
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public static String USAGE = "[-R] <path>";
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public static String DESCRIPTION = "Displays the Access Control Lists"
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+ " (ACLs) of files and directories. If a directory has a default ACL,"
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+ " then getfacl also displays the default ACL.\n"
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+ "-R: List the ACLs of all files and directories recursively.\n"
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+ "<path>: File or directory to list.\n";
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@Override
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protected void processOptions(LinkedList<String> args) throws IOException {
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CommandFormat cf = new CommandFormat(0, Integer.MAX_VALUE, "R");
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cf.parse(args);
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setRecursive(cf.getOpt("R"));
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if (args.isEmpty()) {
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throw new HadoopIllegalArgumentException("<path> is missing");
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}
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if (args.size() > 1) {
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throw new HadoopIllegalArgumentException("Too many arguments");
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}
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}
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@Override
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protected void processPath(PathData item) throws IOException {
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AclStatus aclStatus = item.fs.getAclStatus(item.path);
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out.println("# file: " + item.path);
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out.println("# owner: " + aclStatus.getOwner());
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out.println("# group: " + aclStatus.getGroup());
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List<AclEntry> entries = aclStatus.getEntries();
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if (aclStatus.isStickyBit()) {
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String stickyFlag = "T";
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for (AclEntry aclEntry : entries) {
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if (aclEntry.getType() == AclEntryType.OTHER
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&& aclEntry.getScope() == AclEntryScope.ACCESS
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&& aclEntry.getPermission().implies(FsAction.EXECUTE)) {
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stickyFlag = "t";
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break;
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}
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}
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out.println("# flags: --" + stickyFlag);
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}
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for (AclEntry entry : entries) {
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out.println(entry);
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}
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}
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}
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/**
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* Implementing the '-setfacl' command for the the FsShell.
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*/
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public static class SetfaclCommand extends FsCommand {
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public static String NAME = SET_FACL;
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public static String USAGE = "[-R] [{-b|-k} {-m|-x <acl_spec>} <path>]"
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+ "|[--set <acl_spec> <path>]";
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public static String DESCRIPTION = "Sets Access Control Lists (ACLs)"
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+ " of files and directories.\n"
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+ "Options:\n"
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+ "-b :Remove all but the base ACL entries. The entries for user,"
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+ " group and others are retained for compatibility with permission "
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+ "bits.\n"
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+ "-k :Remove the default ACL.\n"
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+ "-R :Apply operations to all files and directories recursively.\n"
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+ "-m :Modify ACL. New entries are added to the ACL, and existing"
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+ " entries are retained.\n"
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+ "-x :Remove specified ACL entries. Other ACL entries are retained.\n"
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+ "--set :Fully replace the ACL, discarding all existing entries."
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+ " The <acl_spec> must include entries for user, group, and others"
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+ " for compatibility with permission bits.\n"
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+ "<acl_spec>: Comma separated list of ACL entries.\n"
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+ "<path>: File or directory to modify.\n";
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private static final String DEFAULT = "default";
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Path path = null;
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CommandFormat cf = new CommandFormat(0, Integer.MAX_VALUE, "b", "k", "R",
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"m", "x", "-set");
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List<AclEntry> aclEntries = null;
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@Override
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protected void processOptions(LinkedList<String> args) throws IOException {
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cf.parse(args);
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setRecursive(cf.getOpt("R"));
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// Mix of remove and modify acl flags are not allowed
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boolean bothRemoveOptions = cf.getOpt("b") && cf.getOpt("k");
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boolean bothModifyOptions = cf.getOpt("m") && cf.getOpt("x");
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boolean oneRemoveOption = cf.getOpt("b") || cf.getOpt("k");
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boolean oneModifyOption = cf.getOpt("m") || cf.getOpt("x");
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boolean setOption = cf.getOpt("-set");
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if ((bothRemoveOptions || bothModifyOptions)
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|| (oneRemoveOption && oneModifyOption)
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|| (setOption && (oneRemoveOption || oneModifyOption))) {
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throw new HadoopIllegalArgumentException(
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"Specified flags contains both remove and modify flags");
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}
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// Only -m, -x and --set expects <acl_spec>
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if (oneModifyOption || setOption) {
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if (args.size() < 2) {
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throw new HadoopIllegalArgumentException("<acl_spec> is missing");
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}
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aclEntries = parseAclSpec(args.removeFirst());
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}
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if (args.isEmpty()) {
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throw new HadoopIllegalArgumentException("<path> is missing");
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}
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if (args.size() > 1) {
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throw new HadoopIllegalArgumentException("Too many arguments");
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}
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path = new Path(args.removeFirst());
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}
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@Override
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protected void processPath(PathData item) throws IOException {
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if (cf.getOpt("b")) {
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item.fs.removeAcl(item.path);
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} else if (cf.getOpt("k")) {
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item.fs.removeDefaultAcl(item.path);
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} else if (cf.getOpt("m")) {
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item.fs.modifyAclEntries(item.path, aclEntries);
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} else if (cf.getOpt("x")) {
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item.fs.removeAclEntries(item.path, aclEntries);
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} else if (cf.getOpt("-set")) {
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item.fs.setAcl(path, aclEntries);
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}
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}
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/**
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* Parse the aclSpec and returns the list of AclEntry objects.
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*
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* @param aclSpec
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* @return
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*/
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private List<AclEntry> parseAclSpec(String aclSpec) {
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List<AclEntry> aclEntries = new ArrayList<AclEntry>();
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Collection<String> aclStrings = StringUtils.getStringCollection(aclSpec,
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",");
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for (String aclStr : aclStrings) {
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AclEntry.Builder builder = new AclEntry.Builder();
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// Here "::" represent one empty string.
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// StringUtils.getStringCollection() will ignore this.
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String[] split = aclSpec.split(":");
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if (split.length != 3
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&& !(split.length == 4 && DEFAULT.equals(split[0]))) {
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throw new HadoopIllegalArgumentException("Invalid <aclSpec> : "
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+ aclStr);
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}
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int index = 0;
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if (split.length == 4) {
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assert DEFAULT.equals(split[0]);
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// default entry
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index++;
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builder.setScope(AclEntryScope.DEFAULT);
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}
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String type = split[index++];
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AclEntryType aclType = null;
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try {
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aclType = Enum.valueOf(AclEntryType.class, type.toUpperCase());
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builder.setType(aclType);
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} catch (IllegalArgumentException iae) {
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throw new HadoopIllegalArgumentException(
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"Invalid type of acl in <aclSpec> :" + aclStr);
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}
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builder.setName(split[index++]);
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String permission = split[index++];
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FsAction fsAction = FsAction.getFsAction(permission);
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if (null == fsAction) {
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throw new HadoopIllegalArgumentException(
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"Invalid permission in <aclSpec> : " + aclStr);
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}
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builder.setPermission(fsAction);
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aclEntries.add(builder.build());
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}
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return aclEntries;
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}
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}
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}
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@ -43,6 +43,7 @@ abstract public class FsCommand extends Command {
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* @param factory where to register the class
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*/
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public static void registerCommands(CommandFactory factory) {
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factory.registerCommands(AclCommands.class);
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factory.registerCommands(CopyCommands.class);
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factory.registerCommands(Count.class);
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factory.registerCommands(Delete.class);
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@ -0,0 +1,65 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.fs.shell;
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import static org.junit.Assert.assertFalse;
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import java.io.IOException;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FsShell;
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import org.apache.hadoop.util.ToolRunner;
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import org.junit.Before;
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import org.junit.Test;
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public class TestAclCommands {
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private Configuration conf = null;
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@Before
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public void setup() throws IOException {
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conf = new Configuration();
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}
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@Test
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public void testGetfaclValidations() throws Exception {
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assertFalse("getfacl should fail without path",
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0 == runCommand(new String[] { "-getfacl" }));
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assertFalse("getfacl should fail with extra argument",
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0 == runCommand(new String[] { "-getfacl", "/test", "extraArg" }));
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}
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@Test
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public void testSetfaclValidations() throws Exception {
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assertFalse("setfacl should fail without path",
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0 == runCommand(new String[] { "-setfacl" }));
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assertFalse("setfacl should fail without aclSpec",
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0 == runCommand(new String[] { "-setfacl", "-m", "/path" }));
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assertFalse("setfacl should fail with conflicting options",
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0 == runCommand(new String[] { "-setfacl", "-m", "/path" }));
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assertFalse("setfacl should fail with extra arguments",
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0 == runCommand(new String[] { "-setfacl", "/path", "extra" }));
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assertFalse("setfacl should fail with extra arguments",
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0 == runCommand(new String[] { "-setfacl", "--set",
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"default:user::rwx", "/path", "extra" }));
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}
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private int runCommand(String[] commands) throws Exception {
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return ToolRunner.run(conf, new FsShell(), commands);
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}
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}
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@ -21,6 +21,9 @@ HDFS-4685 (Unreleased)
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HDFS-5619. NameNode: record ACL modifications to edit log.
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(Haohui Mai via cnauroth)
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HADOOP-10187. FsShell CLI: add getfacl and setfacl with minimal support for
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getting and setting ACLs. (Vinay via cnauroth)
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OPTIMIZATIONS
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BUG FIXES
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