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HDFS-6516. List of Encryption Zones should be based on inodes (clamb) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/fs-encryption@1607770 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Charles Lamb 2014-07-04 00:24:28 +00:00
parent 03c858dad4
commit c386652828
3 changed files with 142 additions and 53 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES-fs-encryption.txt
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@ -35,6 +35,8 @@ fs-encryption (Unreleased)
HDFS-6625. Remove the Delete Encryption Zone function (clamb)
HDFS-6516. List of Encryption Zones should be based on inodes (clamb)
OPTIMIZATIONS
BUG FIXES

148
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
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@ -27,8 +27,10 @@
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import com.google.protobuf.InvalidProtocolBufferException;
@ -124,6 +126,9 @@ private static INodeDirectorySnapshottable createRoot(FSNamesystem namesystem) {
public final static String DOT_INODES_STRING = ".inodes";
public final static byte[] DOT_INODES =
DFSUtil.string2Bytes(DOT_INODES_STRING);
private final XAttr KEYID_XATTR =
XAttrHelper.buildXAttr(CRYPTO_XATTR_ENCRYPTION_ZONE, null);
INodeDirectory rootDir;
FSImage fsImage;
private final FSNamesystem namesystem;
@ -136,6 +141,35 @@ private static INodeDirectorySnapshottable createRoot(FSNamesystem namesystem) {
private long yieldCount = 0; // keep track of lock yield count.
private final int inodeXAttrsLimit; //inode xattrs max limit
/*
* EncryptionZoneInt is the internal representation of an encryption
* zone. The external representation of an EZ is embodied in an
* EncryptionZone and contains the EZ's pathname.
*/
private class EncryptionZoneInt {
private final String keyId;
private final long inodeId;
EncryptionZoneInt(String keyId, long inodeId) {
this.keyId = keyId;
this.inodeId = inodeId;
}
String getKeyId() {
return keyId;
}
long getINodeId() {
return inodeId;
}
String getFullPathName() {
return getInode(inodeId).getFullPathName();
}
}
private final Map<Long, EncryptionZoneInt> encryptionZones;
// lock to protect the directory and BlockMap
private final ReentrantReadWriteLock dirLock;
@ -221,6 +255,7 @@ public int getWriteHoldCount() {
+ " times");
nameCache = new NameCache<ByteArray>(threshold);
namesystem = ns;
encryptionZones = new HashMap<Long, EncryptionZoneInt>();
}
private FSNamesystem getFSNamesystem() {
@ -545,7 +580,7 @@ boolean unprotectedRenameTo(String src, String dst, long timestamp)
return false;
}
checkEncryptionZoneMoveValidity(src, dst);
checkEncryptionZoneMoveValidity(srcIIP, dstIIP, src);
// Ensure dst has quota to accommodate rename
verifyFsLimitsForRename(srcIIP, dstIIP);
verifyQuotaForRename(srcIIP.getINodes(), dstIIP.getINodes());
@ -750,7 +785,7 @@ boolean unprotectedRenameTo(String src, String dst, long timestamp,
throw new IOException(error);
}
checkEncryptionZoneMoveValidity(src, dst);
checkEncryptionZoneMoveValidity(srcIIP, dstIIP, src);
final INode dstInode = dstIIP.getLastINode();
List<INodeDirectorySnapshottable> snapshottableDirs =
new ArrayList<INodeDirectorySnapshottable>();
@ -974,14 +1009,36 @@ boolean unprotectedRenameTo(String src, String dst, long timestamp,
throw new IOException("rename from " + src + " to " + dst + " failed.");
}
private void checkEncryptionZoneMoveValidity(String src, String dst)
boolean isInAnEZ(INodesInPath iip)
throws UnresolvedLinkException, SnapshotAccessControlException {
readLock();
try {
return (getEncryptionZoneForPath(iip) != null);
} finally {
readUnlock();
}
}
private EncryptionZoneInt getEncryptionZoneForPath(INodesInPath iip) {
Preconditions.checkNotNull(iip);
final INode[] inodes = iip.getINodes();
for (int i = inodes.length -1; i >= 0; i--) {
final INode inode = inodes[i];
if (inode != null) {
final EncryptionZoneInt ezi = encryptionZones.get(inode.getId());
if (ezi != null) {
return ezi;
}
}
}
return null;
}
private void checkEncryptionZoneMoveValidity(INodesInPath srcIIP,
INodesInPath dstIIP, String src)
throws IOException {
final EncryptionZone srcEZ =
getFSNamesystem().getEncryptionZoneForPath(src);
final EncryptionZone dstEZ =
getFSNamesystem().getEncryptionZoneForPath(dst);
final boolean srcInEZ = srcEZ != null;
final boolean dstInEZ = dstEZ != null;
final boolean srcInEZ = (getEncryptionZoneForPath(srcIIP) != null);
final boolean dstInEZ = (getEncryptionZoneForPath(dstIIP) != null);
if (srcInEZ) {
if (!dstInEZ) {
throw new IOException(src + " can't be moved from an encryption zone.");
@ -993,12 +1050,18 @@ private void checkEncryptionZoneMoveValidity(String src, String dst)
}
if (srcInEZ || dstInEZ) {
if (!srcEZ.getPath().equals(dstEZ.getPath())) {
final EncryptionZoneInt srcEZI = getEncryptionZoneForPath(srcIIP);
final EncryptionZoneInt dstEZI = getEncryptionZoneForPath(dstIIP);
Preconditions.checkArgument(srcEZI != null, "couldn't find src EZ?");
Preconditions.checkArgument(dstEZI != null, "couldn't find dst EZ?");
if (srcEZI != dstEZI) {
final String srcEZPath = srcEZI.getFullPathName();
final String dstEZPath = dstEZI.getFullPathName();
final StringBuilder sb = new StringBuilder(src);
sb.append(" can't be moved from encryption zone ");
sb.append(srcEZ.getPath());
sb.append(srcEZPath);
sb.append(" to encryption zone ");
sb.append(dstEZ.getPath());
sb.append(dstEZPath);
sb.append(".");
throw new IOException(sb.toString());
}
@ -2167,6 +2230,18 @@ public INodeMap getINodeMap() {
public final void addToInodeMap(INode inode) {
if (inode instanceof INodeWithAdditionalFields) {
inodeMap.put(inode);
final XAttrFeature xaf = inode.getXAttrFeature();
if (xaf != null) {
final List<XAttr> xattrs = xaf.getXAttrs();
for (XAttr xattr : xattrs) {
final String xaName = XAttrHelper.getPrefixName(xattr);
if (CRYPTO_XATTR_ENCRYPTION_ZONE.equals(xaName)) {
encryptionZones.put(inode.getId(),
new EncryptionZoneInt(new String(xattr.getValue()),
inode.getId()));
}
}
}
}
}
@ -2178,6 +2253,7 @@ public final void removeFromInodeMap(List<? extends INode> inodes) {
for (INode inode : inodes) {
if (inode != null && inode instanceof INodeWithAdditionalFields) {
inodeMap.remove(inode);
encryptionZones.remove(inode.getId());
}
}
}
@ -2682,6 +2758,8 @@ List<XAttr> filterINodeXAttrs(final List<XAttr> existingXAttrs,
for (ListIterator<XAttr> it = toFilter.listIterator(); it.hasNext()
;) {
XAttr filter = it.next();
Preconditions.checkArgument(!KEYID_XATTR.equalsIgnoreValue(filter),
"The encryption zone xattr should never be deleted.");
if (a.equalsIgnoreValue(filter)) {
add = false;
it.remove();
@ -2705,17 +2783,42 @@ XAttr createEncryptionZone(String src, String keyId)
throw new IOException(
"Attempt to create an encryption zone for a non-empty directory.");
}
final INodesInPath srcIIP = getINodesInPath4Write(src, false);
final EncryptionZoneInt ezi = getEncryptionZoneForPath(srcIIP);
if (ezi != null) {
throw new IOException("Directory " + src +
" is already in an encryption zone. (" + ezi.getFullPathName() + ")");
}
final XAttr keyIdXAttr =
XAttrHelper.buildXAttr(CRYPTO_XATTR_ENCRYPTION_ZONE, keyId.getBytes());
List<XAttr> xattrs = Lists.newArrayListWithCapacity(1);
final List<XAttr> xattrs = Lists.newArrayListWithCapacity(1);
xattrs.add(keyIdXAttr);
unprotectedSetXAttrs(src, xattrs, EnumSet.of(XAttrSetFlag.CREATE));
final INode inode = unprotectedSetXAttrs(src, xattrs,
EnumSet.of(XAttrSetFlag.CREATE));
encryptionZones.put(inode.getId(),
new EncryptionZoneInt(keyId, inode.getId()));
return keyIdXAttr;
} finally {
writeUnlock();
}
}
List<EncryptionZone> listEncryptionZones() throws IOException {
readLock();
try {
final List<EncryptionZone> ret =
Lists.newArrayListWithExpectedSize(encryptionZones.size());
for (EncryptionZoneInt ezi : encryptionZones.values()) {
ret.add(new EncryptionZone(ezi.getFullPathName(), ezi.getKeyId()));
}
return ret;
} finally {
readUnlock();
}
}
/**
* Set the FileEncryptionInfo for an INode.
*/
@ -2782,7 +2885,7 @@ void setXAttrs(final String src, final List<XAttr> xAttrs,
}
}
void unprotectedSetXAttrs(final String src, final List<XAttr> xAttrs,
INode unprotectedSetXAttrs(final String src, final List<XAttr> xAttrs,
final EnumSet<XAttrSetFlag> flag)
throws QuotaExceededException, IOException {
assert hasWriteLock();
@ -2791,7 +2894,22 @@ void unprotectedSetXAttrs(final String src, final List<XAttr> xAttrs,
int snapshotId = iip.getLatestSnapshotId();
List<XAttr> existingXAttrs = XAttrStorage.readINodeXAttrs(inode);
List<XAttr> newXAttrs = setINodeXAttrs(existingXAttrs, xAttrs, flag);
/*
* If we're adding the encryption zone xattr, then add src to the list
* of encryption zones.
*/
for (XAttr xattr : newXAttrs) {
final String xaName = XAttrHelper.getPrefixName(xattr);
if (CRYPTO_XATTR_ENCRYPTION_ZONE.equals(xaName)) {
final EncryptionZoneInt ez =
new EncryptionZoneInt(new String(xattr.getValue()), inode.getId());
encryptionZones.put(inode.getId(), ez);
}
}
XAttrStorage.updateINodeXAttrs(inode, newXAttrs, snapshotId);
return inode;
}
List<XAttr> setINodeXAttrs(final List<XAttr> existingXAttrs,

45
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -270,7 +270,6 @@
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Charsets;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
@ -528,7 +527,6 @@ private void logAuditEvent(boolean succeeded,
private KeyProvider provider = null;
private KeyProvider.Options providerOptions = null;
private final Map<String, EncryptionZone> encryptionZones;
private final CryptoCodec codec;
private volatile boolean imageLoaded = false;
@ -855,7 +853,6 @@ static FSNamesystem loadFromDisk(Configuration conf) throws IOException {
auditLoggers.get(0) instanceof DefaultAuditLogger;
this.retryCache = ignoreRetryCache ? null : initRetryCache(conf);
this.nnConf = new NNConf(conf);
this.encryptionZones = new HashMap<String, EncryptionZone>();
} catch(IOException e) {
LOG.error(getClass().getSimpleName() + " initialization failed.", e);
close();
@ -2308,11 +2305,12 @@ private void verifyParentDir(String src) throws FileNotFoundException,
* @return chosen CipherSuite, or null if file is not in an EncryptionZone
* @throws IOException
*/
private CipherSuite chooseCipherSuite(String src, List<CipherSuite>
cipherSuites) throws UnknownCipherSuiteException {
EncryptionZone zone = getEncryptionZoneForPath(src);
private CipherSuite chooseCipherSuite(INodesInPath srcIIP, List<CipherSuite>
cipherSuites)
throws UnknownCipherSuiteException, UnresolvedLinkException,
SnapshotAccessControlException {
// Not in an EZ
if (zone == null) {
if (!dir.isInAnEZ(srcIIP)) {
return null;
}
CipherSuite chosen = null;
@ -2469,7 +2467,7 @@ private void startFileInternal(FSPermissionChecker pc, String src,
}
FileEncryptionInfo feInfo = null;
CipherSuite suite = chooseCipherSuite(src, cipherSuites);
CipherSuite suite = chooseCipherSuite(iip, cipherSuites);
if (suite != null) {
Preconditions.checkArgument(!suite.equals(CipherSuite.UNKNOWN),
"Chose an UNKNOWN CipherSuite!");
@ -3651,11 +3649,6 @@ private boolean deleteInternal(String src, boolean recursive,
FsAction.ALL, true, false);
}
final EncryptionZone ez = getEncryptionZoneForPath(src);
if (ez != null) {
encryptionZones.remove(src);
}
long mtime = now();
// Unlink the target directory from directory tree
long filesRemoved = dir.delete(src, collectedBlocks, removedINodes,
@ -8365,17 +8358,10 @@ private void createEncryptionZoneInt(final String srcArg, String keyId,
checkNameNodeSafeMode("Cannot create encryption zone on " + src);
src = FSDirectory.resolvePath(src, pathComponents, dir);
EncryptionZone ez = getEncryptionZoneForPath(src);
if (ez != null) {
throw new IOException("Directory " + src +
" is already in an encryption zone. (" + ez.getPath() + ")");
}
final XAttr keyIdXAttr = dir.createEncryptionZone(src, keyId);
List<XAttr> xAttrs = Lists.newArrayListWithCapacity(1);
xAttrs.add(keyIdXAttr);
getEditLog().logSetXAttrs(src, xAttrs, logRetryCache);
encryptionZones.put(src, new EncryptionZone(src, keyId));
resultingStat = getAuditFileInfo(src, false);
} finally {
writeUnlock();
@ -8400,7 +8386,6 @@ private String createNewKey(String src)
}
List<EncryptionZone> listEncryptionZones() throws IOException {
boolean success = false;
checkSuperuserPrivilege();
checkOperation(OperationCategory.READ);
@ -8408,8 +8393,7 @@ List<EncryptionZone> listEncryptionZones() throws IOException {
try {
checkSuperuserPrivilege();
checkOperation(OperationCategory.READ);
final List<EncryptionZone> ret =
Lists.newArrayList(encryptionZones.values());
final List<EncryptionZone> ret = dir.listEncryptionZones();
success = true;
return ret;
} finally {
@ -8418,21 +8402,6 @@ List<EncryptionZone> listEncryptionZones() throws IOException {
}
}
/** Lookup the encryption zone of a path. */
EncryptionZone getEncryptionZoneForPath(String src) {
assert hasReadLock();
final String[] components = INode.getPathNames(src);
for (int i = components.length; i > 0; i--) {
final List<String> l = Arrays.asList(Arrays.copyOfRange(components, 0, i));
String p = Joiner.on(Path.SEPARATOR).join(l);
final EncryptionZone ret = encryptionZones.get(p);
if (ret != null) {
return ret;
}
}
return null;
}
/**
* Set xattr for a file or directory.
*