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HDFS-5849. Removing ACL from an inode fails if it has only a default ACL. Contributed by Chris Nauroth. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-4685@1563205 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Chris Nauroth 2014-01-31 18:33:56 +00:00
parent 7a03dc0482
commit c654c2e8b9
3 changed files with 37 additions and 11 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-4685.txt
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@ -67,3 +67,6 @@ HDFS-4685 (Unreleased)
HADOOP-10277. setfacl -x fails to parse ACL spec if trying to remove the
mask entry. (Vinay via cnauroth)
HDFS-5849. Removing ACL from an inode fails if it has only a default ACL.
(cnauroth)

28
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/AclStorage.java
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@ -26,6 +26,7 @@ import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.fs.permission.AclEntry;
import org.apache.hadoop.fs.permission.AclEntryScope;
import org.apache.hadoop.fs.permission.AclEntryType;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.protocol.AclException;
import org.apache.hadoop.hdfs.protocol.QuotaExceededException;
@ -157,22 +158,27 @@ final class AclStorage {
int snapshotId) throws QuotaExceededException {
FsPermission perm = inode.getPermissionStatus(snapshotId).getPermission();
if (perm.getAclBit()) {
// Restore group permissions from the feature's entry to permission bits,
// overwriting the mask, which is not part of a minimal ACL.
List<AclEntry> featureEntries = inode.getAclFeature().getEntries();
AclEntry groupEntryKey = new AclEntry.Builder()
.setScope(AclEntryScope.ACCESS)
.setType(AclEntryType.GROUP)
.build();
int groupEntryIndex = Collections.binarySearch(featureEntries,
groupEntryKey, AclTransformation.ACL_ENTRY_COMPARATOR);
assert groupEntryIndex >= 0;
final FsAction groupPerm;
if (featureEntries.get(0).getScope() == AclEntryScope.ACCESS) {
// Restore group permissions from the feature's entry to permission
// bits, overwriting the mask, which is not part of a minimal ACL.
AclEntry groupEntryKey = new AclEntry.Builder()
.setScope(AclEntryScope.ACCESS)
.setType(AclEntryType.GROUP)
.build();
int groupEntryIndex = Collections.binarySearch(featureEntries,
groupEntryKey, AclTransformation.ACL_ENTRY_COMPARATOR);
assert groupEntryIndex >= 0;
groupPerm = featureEntries.get(groupEntryIndex).getPermission();
} else {
groupPerm = perm.getGroupAction();
}
// Remove the feature and turn off the ACL bit.
inode.removeAclFeature();
FsPermission newPerm = new FsPermission(perm.getUserAction(),
featureEntries.get(groupEntryIndex).getPermission(),
perm.getOtherAction(),
groupPerm, perm.getOtherAction(),
perm.getStickyBit(), false);
inode.setPermission(newPerm, snapshotId);
}

17
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestNameNodeAcl.java
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@ -535,6 +535,23 @@ public class TestNameNodeAcl {
assertAclFeature(false);
}
@Test
public void testRemoveAclOnlyDefault() throws IOException {
FileSystem.mkdirs(fs, path, FsPermission.createImmutable((short)0750));
List<AclEntry> aclSpec = Lists.newArrayList(
aclEntry(ACCESS, USER, ALL),
aclEntry(ACCESS, GROUP, READ_EXECUTE),
aclEntry(ACCESS, OTHER, NONE),
aclEntry(DEFAULT, USER, "foo", ALL));
fs.setAcl(path, aclSpec);
fs.removeAcl(path);
AclStatus s = fs.getAclStatus(path);
AclEntry[] returned = s.getEntries().toArray(new AclEntry[0]);
assertArrayEquals(new AclEntry[] { }, returned);
assertPermission((short)0750);
assertAclFeature(false);
}
@Test(expected=FileNotFoundException.class)
public void testRemoveAclPathNotFound() throws IOException {
// Path has not been created.