Apache
/
hadoop
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

HDFS-6718. Remove EncryptionZoneManager lock. (wang) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/fs-encryption@1612439 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andrew Wang 2014-07-22 00:55:20 +00:00
parent 7b466b3b70
commit b57ec16567
2 changed files with 65 additions and 127 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hadoop-hdfs-project/hadoop-hdfs/CHANGES-fs-encryption.txt
View File

@ -52,6 +52,8 @@ fs-encryption (Unreleased)
HDFS-6716. Update usage of KeyProviderCryptoExtension APIs on NameNode.
(wang)
HDFS-6718. Remove EncryptionZoneManager lock. (wang)
OPTIMIZATIONS
BUG FIXES

68
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/EncryptionZoneManager.java
View File

@ -60,35 +60,6 @@ public class EncryptionZoneManager {
}
/**
* Protects the <tt>encryptionZones</tt> map and its contents.
*/
private final ReentrantReadWriteLock lock;
private void readLock() {
lock.readLock().lock();
}
private void readUnlock() {
lock.readLock().unlock();
}
private void writeLock() {
lock.writeLock().lock();
}
private void writeUnlock() {
lock.writeLock().unlock();
}
public boolean hasWriteLock() {
return lock.isWriteLockedByCurrentThread();
}
public boolean hasReadLock() {
return lock.getReadHoldCount() > 0 || hasWriteLock();
}
private final Map<Long, EncryptionZoneInt> encryptionZones;
private final FSDirectory dir;
private final KeyProvider provider;
@ -101,7 +72,6 @@ public class EncryptionZoneManager {
public EncryptionZoneManager(FSDirectory dir, KeyProvider provider) {
this.dir = dir;
this.provider = provider;
lock = new ReentrantReadWriteLock();
encryptionZones = new HashMap<Long, EncryptionZoneInt>();
}
@ -116,12 +86,7 @@ public class EncryptionZoneManager {
void addEncryptionZone(Long inodeId, String keyId) {
assert dir.hasWriteLock();
final EncryptionZoneInt ez = new EncryptionZoneInt(inodeId, keyId);
writeLock();
try {
encryptionZones.put(inodeId, ez);
} finally {
writeUnlock();
}
}
/**
@ -131,12 +96,7 @@ public class EncryptionZoneManager {
*/
void removeEncryptionZone(Long inodeId) {
assert dir.hasWriteLock();
writeLock();
try {
encryptionZones.remove(inodeId);
} finally {
writeUnlock();
}
}
/**
@ -147,12 +107,7 @@ public class EncryptionZoneManager {
boolean isInAnEZ(INodesInPath iip)
throws UnresolvedLinkException, SnapshotAccessControlException {
assert dir.hasReadLock();
readLock();
try {
return (getEncryptionZoneForPath(iip) != null);
} finally {
readUnlock();
}
}
/**
@ -172,16 +127,12 @@ public class EncryptionZoneManager {
* Called while holding the FSDirectory lock.
*/
String getKeyName(final INodesInPath iip) {
readLock();
try {
assert dir.hasReadLock();
EncryptionZoneInt ezi = getEncryptionZoneForPath(iip);
if (ezi == null) {
return null;
}
return ezi.getKeyName();
} finally {
readUnlock();
}
}
/**
@ -191,7 +142,7 @@ public class EncryptionZoneManager {
* Must be called while holding the manager lock.
*/
private EncryptionZoneInt getEncryptionZoneForPath(INodesInPath iip) {
assert hasReadLock();
assert dir.hasReadLock();
Preconditions.checkNotNull(iip);
final INode[] inodes = iip.getINodes();
for (int i = inodes.length - 1; i >= 0; i--) {
@ -220,8 +171,6 @@ public class EncryptionZoneManager {
void checkMoveValidity(INodesInPath srcIIP, INodesInPath dstIIP, String src)
throws IOException {
assert dir.hasReadLock();
readLock();
try {
final EncryptionZoneInt srcEZI = getEncryptionZoneForPath(srcIIP);
final EncryptionZoneInt dstEZI = getEncryptionZoneForPath(dstIIP);
final boolean srcInEZ = (srcEZI != null);
@ -253,9 +202,6 @@ public class EncryptionZoneManager {
throw new IOException(sb.toString());
}
}
} finally {
readUnlock();
}
}
/**
@ -266,8 +212,6 @@ public class EncryptionZoneManager {
XAttr createEncryptionZone(String src, String keyId, KeyVersion keyVersion)
throws IOException {
assert dir.hasWriteLock();
writeLock();
try {
if (dir.isNonEmptyDirectory(src)) {
throw new IOException(
"Attempt to create an encryption zone for a non-empty directory.");
@ -291,9 +235,6 @@ public class EncryptionZoneManager {
// Re-get the new encryption zone add the latest key version
ezi = getEncryptionZoneForPath(srcIIP);
return keyIdXAttr;
} finally {
writeUnlock();
}
}
/**
@ -303,16 +244,11 @@ public class EncryptionZoneManager {
*/
List<EncryptionZone> listEncryptionZones() throws IOException {
assert dir.hasReadLock();
readLock();
try {
final List<EncryptionZone> ret =
Lists.newArrayListWithExpectedSize(encryptionZones.size());
for (EncryptionZoneInt ezi : encryptionZones.values()) {
ret.add(new EncryptionZone(getFullPathName(ezi), ezi.getKeyName()));
}
return ret;
} finally {
readUnlock();
}
}
}