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HDFS-12614. FSPermissionChecker#getINodeAttrs() throws NPE when INodeAttributesProvider configured.

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This commit is contained in:
Manoj Govindassamy 2017-10-16 17:42:41 -07:00
parent e906108fc9
commit b406d8e375
2 changed files with 54 additions and 18 deletions
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12
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSPermissionChecker.java
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@ -275,8 +275,16 @@ private INodeAttributes getINodeAttrs(byte[][] pathByNameArr, int pathIdx,
INodeAttributes inodeAttrs = inode.getSnapshotINode(snapshotId);
if (getAttributesProvider() != null) {
String[] elements = new String[pathIdx + 1];
for (int i = 0; i < elements.length; i++) {
elements[i] = DFSUtil.bytes2String(pathByNameArr[i]);
/**
* {@link INode#getPathComponents(String)} returns a null component
* for the root only path "/". Assign an empty string if so.
*/
if (pathByNameArr.length == 1 && pathByNameArr[0] == null) {
elements[0] = "";
} else {
for (int i = 0; i < elements.length; i++) {
elements[i] = DFSUtil.bytes2String(pathByNameArr[i]);
}
}
inodeAttrs = getAttributesProvider().getAttributes(elements, inodeAttrs);
}

60
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestINodeAttributeProvider.java
View File

@ -313,31 +313,59 @@ public void testAuthzBypassingProvider() throws Exception {
testBypassProviderHelper(users, HDFS_PERMISSION, true);
}
@Test
public void testCustomProvider() throws Exception {
private void verifyFileStatus(UserGroupInformation ugi) throws IOException {
FileSystem fs = FileSystem.get(miniDFS.getConfiguration(0));
fs.mkdirs(new Path("/user/xxx"));
FileStatus status = fs.getFileStatus(new Path("/user/xxx"));
Assert.assertEquals(System.getProperty("user.name"), status.getOwner());
FileStatus status = fs.getFileStatus(new Path("/"));
LOG.info("Path '/' is owned by: "
+ status.getOwner() + ":" + status.getGroup());
Path userDir = new Path("/user/" + ugi.getShortUserName());
fs.mkdirs(userDir);
status = fs.getFileStatus(userDir);
Assert.assertEquals(ugi.getShortUserName(), status.getOwner());
Assert.assertEquals("supergroup", status.getGroup());
Assert.assertEquals(new FsPermission((short) 0755), status.getPermission());
fs.mkdirs(new Path("/user/authz"));
Path p = new Path("/user/authz");
status = fs.getFileStatus(p);
Path authzDir = new Path("/user/authz");
fs.mkdirs(authzDir);
status = fs.getFileStatus(authzDir);
Assert.assertEquals("foo", status.getOwner());
Assert.assertEquals("bar", status.getGroup());
Assert.assertEquals(new FsPermission((short) 0770), status.getPermission());
AclStatus aclStatus = fs.getAclStatus(p);
AclStatus aclStatus = fs.getAclStatus(authzDir);
Assert.assertEquals(1, aclStatus.getEntries().size());
Assert.assertEquals(AclEntryType.GROUP, aclStatus.getEntries().get(0)
.getType());
Assert.assertEquals("xxx", aclStatus.getEntries().get(0)
.getName());
Assert.assertEquals(FsAction.ALL, aclStatus.getEntries().get(0)
.getPermission());
Map<String, byte[]> xAttrs = fs.getXAttrs(p);
Assert.assertEquals(AclEntryType.GROUP,
aclStatus.getEntries().get(0).getType());
Assert.assertEquals("xxx",
aclStatus.getEntries().get(0).getName());
Assert.assertEquals(FsAction.ALL,
aclStatus.getEntries().get(0).getPermission());
Map<String, byte[]> xAttrs = fs.getXAttrs(authzDir);
Assert.assertTrue(xAttrs.containsKey("user.test"));
Assert.assertEquals(2, xAttrs.get("user.test").length);
}
/**
* With the custom provider configured, verify file status attributes.
* A superuser can bypass permission check while resolving paths. So,
* verify file status for both superuser and non-superuser.
*/
@Test
public void testCustomProvider() throws Exception {
final UserGroupInformation[] users = new UserGroupInformation[]{
UserGroupInformation.createUserForTesting(
System.getProperty("user.name"), new String[]{"supergroup"}),
UserGroupInformation.createUserForTesting(
"normaluser", new String[]{"normalusergroup"}),
};
for (final UserGroupInformation user : users) {
user.doAs((PrivilegedExceptionAction<Object>) () -> {
verifyFileStatus(user);
return null;
});
}
}
}