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HDFS-6562. Refactor rename() in FSDirectory. Contributed by Haohui Mai. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1605016 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Haohui Mai 2014-06-24 06:56:27 +00:00
parent 214aceb9f7
commit 08986fdbed
2 changed files with 236 additions and 310 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
View File

@ -467,6 +467,8 @@ Release 2.5.0 - UNRELEASED
HDFS-6578. add toString method to DatanodeStorage for easier debugging.
(Yongjun Zhang via Arpit Agarwal)
HDFS-6562. Refactor rename() in FSDirectory. (wheat9)
OPTIMIZATIONS
HDFS-6214. Webhdfs has poor throughput for files >2GB (daryn)

544
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSDirectory.java
View File

@ -67,7 +67,6 @@ import org.apache.hadoop.hdfs.protocol.SnapshotException;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStorageInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
@ -469,55 +468,30 @@ public class FSDirectory implements Closeable {
assert hasWriteLock();
INodesInPath srcIIP = getINodesInPath4Write(src, false);
final INode srcInode = srcIIP.getLastINode();
// check the validation of the source
if (srcInode == null) {
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ "failed to rename " + src + " to " + dst
+ " because source does not exist");
return false;
}
if (srcIIP.getINodes().length == 1) {
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+"failed to rename "+src+" to "+dst+ " because source is the root");
try {
validateRenameSource(src, srcIIP);
} catch (SnapshotException e) {
throw e;
} catch (IOException ignored) {
return false;
}
// srcInode and its subtree cannot contain snapshottable directories with
// snapshots
List<INodeDirectorySnapshottable> snapshottableDirs =
new ArrayList<INodeDirectorySnapshottable>();
checkSnapshot(srcInode, snapshottableDirs);
if (isDir(dst)) {
dst += Path.SEPARATOR + new Path(src).getName();
}
// check the validity of the destination
// validate the destination
if (dst.equals(src)) {
return true;
}
if (srcInode.isSymlink() &&
dst.equals(srcInode.asSymlink().getSymlinkString())) {
throw new FileAlreadyExistsException(
"Cannot rename symlink "+src+" to its target "+dst);
}
// dst cannot be directory or a file under src
if (dst.startsWith(src) &&
dst.charAt(src.length()) == Path.SEPARATOR_CHAR) {
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ "failed to rename " + src + " to " + dst
+ " because destination starts with src");
try {
validateRenameDestination(src, dst, srcInode);
} catch (IOException ignored) {
return false;
}
byte[][] dstComponents = INode.getPathComponents(dst);
INodesInPath dstIIP = getExistingPathINodes(dstComponents);
if (dstIIP.isSnapshot()) {
throw new SnapshotAccessControlException(
"Modification on RO snapshot is disallowed");
}
INodesInPath dstIIP = getINodesInPath4Write(dst, false);
if (dstIIP.getLastINode() != null) {
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+"failed to rename "+src+" to "+dst+
@ -535,42 +509,10 @@ public class FSDirectory implements Closeable {
// Ensure dst has quota to accommodate rename
verifyFsLimitsForRename(srcIIP, dstIIP);
verifyQuotaForRename(srcIIP.getINodes(), dstIIP.getINodes());
RenameOperation tx = new RenameOperation(src, dst, srcIIP, dstIIP);
boolean added = false;
INode srcChild = srcIIP.getLastINode();
final byte[] srcChildName = srcChild.getLocalNameBytes();
final boolean isSrcInSnapshot = srcChild.isInLatestSnapshot(
srcIIP.getLatestSnapshotId());
final boolean srcChildIsReference = srcChild.isReference();
// Record the snapshot on srcChild. After the rename, before any new
// snapshot is taken on the dst tree, changes will be recorded in the latest
// snapshot of the src tree.
if (isSrcInSnapshot) {
srcChild = srcChild.recordModification(srcIIP.getLatestSnapshotId());
srcIIP.setLastINode(srcChild);
}
// check srcChild for reference
final INodeReference.WithCount withCount;
Quota.Counts oldSrcCounts = Quota.Counts.newInstance();
int srcRefDstSnapshot = srcChildIsReference ? srcChild.asReference()
.getDstSnapshotId() : Snapshot.CURRENT_STATE_ID;
if (isSrcInSnapshot) {
final INodeReference.WithName withName =
srcIIP.getINode(-2).asDirectory().replaceChild4ReferenceWithName(
srcChild, srcIIP.getLatestSnapshotId());
withCount = (INodeReference.WithCount) withName.getReferredINode();
srcChild = withName;
srcIIP.setLastINode(srcChild);
// get the counts before rename
withCount.getReferredINode().computeQuotaUsage(oldSrcCounts, true);
} else if (srcChildIsReference) {
// srcChild is reference but srcChild is not in latest snapshot
withCount = (WithCount) srcChild.asReference().getReferredINode();
} else {
withCount = null;
}
try {
// remove src
@ -581,84 +523,22 @@ public class FSDirectory implements Closeable {
+ " because the source can not be removed");
return false;
}
if (dstParent.getParent() == null) {
// src and dst file/dir are in the same directory, and the dstParent has
// been replaced when we removed the src. Refresh the dstIIP and
// dstParent.
dstIIP = getExistingPathINodes(dstComponents);
dstParent = dstIIP.getINode(-2);
}
// add src to the destination
srcChild = srcIIP.getLastINode();
final byte[] dstChildName = dstIIP.getLastLocalName();
final INode toDst;
if (withCount == null) {
srcChild.setLocalName(dstChildName);
toDst = srcChild;
} else {
withCount.getReferredINode().setLocalName(dstChildName);
int dstSnapshotId = dstIIP.getLatestSnapshotId();
toDst = new INodeReference.DstReference(
dstParent.asDirectory(), withCount, dstSnapshotId);
}
added = addLastINodeNoQuotaCheck(dstIIP, toDst);
added = tx.addSourceToDestination();
if (added) {
if (NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug("DIR* FSDirectory.unprotectedRenameTo: "
+ src + " is renamed to " + dst);
}
// update modification time of dst and the parent of src
final INode srcParent = srcIIP.getINode(-2);
srcParent.updateModificationTime(timestamp, srcIIP.getLatestSnapshotId());
dstParent = dstIIP.getINode(-2); // refresh dstParent
dstParent.updateModificationTime(timestamp, dstIIP.getLatestSnapshotId());
// update moved leases with new filename
getFSNamesystem().unprotectedChangeLease(src, dst);
// update the quota usage in src tree
if (isSrcInSnapshot) {
// get the counts after rename
Quota.Counts newSrcCounts = srcChild.computeQuotaUsage(
Quota.Counts.newInstance(), false);
newSrcCounts.subtract(oldSrcCounts);
srcParent.addSpaceConsumed(newSrcCounts.get(Quota.NAMESPACE),
newSrcCounts.get(Quota.DISKSPACE), false);
}
tx.updateMtimeAndLease(timestamp);
tx.updateQuotasInSourceTree();
return true;
}
} finally {
if (!added) {
final INodeDirectory srcParent = srcIIP.getINode(-2).asDirectory();
final INode oldSrcChild = srcChild;
// put it back
if (withCount == null) {
srcChild.setLocalName(srcChildName);
} else if (!srcChildIsReference) { // src must be in snapshot
// the withCount node will no longer be used thus no need to update
// its reference number here
srcChild = withCount.getReferredINode();
srcChild.setLocalName(srcChildName);
} else {
withCount.removeReference(oldSrcChild.asReference());
srcChild = new INodeReference.DstReference(
srcParent, withCount, srcRefDstSnapshot);
withCount.getReferredINode().setLocalName(srcChildName);
}
if (isSrcInSnapshot) {
// srcParent must have snapshot feature since isSrcInSnapshot is true
// and src node has been removed from srcParent
srcParent.undoRename4ScrParent(oldSrcChild.asReference(), srcChild);
} else {
// original srcChild is not in latest snapshot, we only need to add
// the srcChild back
addLastINodeNoQuotaCheck(srcIIP, srcChild);
}
tx.restoreSource();
}
}
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
@ -681,53 +561,21 @@ public class FSDirectory implements Closeable {
FileNotFoundException, ParentNotDirectoryException,
QuotaExceededException, UnresolvedLinkException, IOException {
assert hasWriteLock();
boolean overwrite = false;
if (null != options) {
for (Rename option : options) {
if (option == Rename.OVERWRITE) {
overwrite = true;
}
}
}
boolean overwrite = options != null && Arrays.asList(options).contains
(Rename.OVERWRITE);
final String error;
final INodesInPath srcIIP = getINodesInPath4Write(src, false);
final INode srcInode = srcIIP.getLastINode();
// validate source
if (srcInode == null) {
error = "rename source " + src + " is not found.";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new FileNotFoundException(error);
}
if (srcIIP.getINodes().length == 1) {
error = "rename source cannot be the root";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new IOException(error);
}
// srcInode and its subtree cannot contain snapshottable directories with
// snapshots
checkSnapshot(srcInode, null);
validateRenameSource(src, srcIIP);
// validate the destination
if (dst.equals(src)) {
throw new FileAlreadyExistsException(
"The source "+src+" and destination "+dst+" are the same");
}
if (srcInode.isSymlink() &&
dst.equals(srcInode.asSymlink().getSymlinkString())) {
throw new FileAlreadyExistsException(
"Cannot rename symlink "+src+" to its target "+dst);
}
// dst cannot be a directory or a file under src
if (dst.startsWith(src) &&
dst.charAt(src.length()) == Path.SEPARATOR_CHAR) {
error = "Rename destination " + dst
+ " is a directory or file under source " + src;
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new IOException(error);
}
validateRenameDestination(src, dst, srcInode);
INodesInPath dstIIP = getINodesInPath4Write(dst, false);
if (dstIIP.getINodes().length == 1) {
error = "rename destination cannot be the root";
@ -740,30 +588,7 @@ public class FSDirectory implements Closeable {
List<INodeDirectorySnapshottable> snapshottableDirs =
new ArrayList<INodeDirectorySnapshottable>();
if (dstInode != null) { // Destination exists
// It's OK to rename a file to a symlink and vice versa
if (dstInode.isDirectory() != srcInode.isDirectory()) {
error = "Source " + src + " and destination " + dst
+ " must both be directories";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new IOException(error);
}
if (!overwrite) { // If destination exists, overwrite flag must be true
error = "rename destination " + dst + " already exists";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new FileAlreadyExistsException(error);
}
if (dstInode.isDirectory()) {
final ReadOnlyList<INode> children = dstInode.asDirectory()
.getChildrenList(Snapshot.CURRENT_STATE_ID);
if (!children.isEmpty()) {
error = "rename destination directory is not empty: " + dst;
NameNode.stateChangeLog.warn(
"DIR* FSDirectory.unprotectedRenameTo: " + error);
throw new IOException(error);
}
}
validateRenameOverwrite(src, dst, overwrite, srcInode, dstInode);
checkSnapshot(dstInode, snapshottableDirs);
}
@ -785,40 +610,8 @@ public class FSDirectory implements Closeable {
verifyFsLimitsForRename(srcIIP, dstIIP);
verifyQuotaForRename(srcIIP.getINodes(), dstIIP.getINodes());
INode srcChild = srcIIP.getLastINode();
final byte[] srcChildName = srcChild.getLocalNameBytes();
final boolean isSrcInSnapshot = srcChild.isInLatestSnapshot(
srcIIP.getLatestSnapshotId());
final boolean srcChildIsReference = srcChild.isReference();
// Record the snapshot on srcChild. After the rename, before any new
// snapshot is taken on the dst tree, changes will be recorded in the latest
// snapshot of the src tree.
if (isSrcInSnapshot) {
srcChild = srcChild.recordModification(srcIIP.getLatestSnapshotId());
srcIIP.setLastINode(srcChild);
}
// check srcChild for reference
final INodeReference.WithCount withCount;
int srcRefDstSnapshot = srcChildIsReference ? srcChild.asReference()
.getDstSnapshotId() : Snapshot.CURRENT_STATE_ID;
Quota.Counts oldSrcCounts = Quota.Counts.newInstance();
if (isSrcInSnapshot) {
final INodeReference.WithName withName = srcIIP.getINode(-2).asDirectory()
.replaceChild4ReferenceWithName(srcChild, srcIIP.getLatestSnapshotId());
withCount = (INodeReference.WithCount) withName.getReferredINode();
srcChild = withName;
srcIIP.setLastINode(srcChild);
// get the counts before rename
withCount.getReferredINode().computeQuotaUsage(oldSrcCounts, true);
} else if (srcChildIsReference) {
// srcChild is reference but srcChild is not in latest snapshot
withCount = (WithCount) srcChild.asReference().getReferredINode();
} else {
withCount = null;
}
RenameOperation tx = new RenameOperation(src, dst, srcIIP, dstIIP);
boolean undoRemoveSrc = true;
final long removedSrc = removeLastINode(srcIIP);
if (removedSrc == -1) {
@ -829,13 +622,6 @@ public class FSDirectory implements Closeable {
throw new IOException(error);
}
if (dstParent.getParent() == null) {
// src and dst file/dir are in the same directory, and the dstParent has
// been replaced when we removed the src. Refresh the dstIIP and
// dstParent.
dstIIP = getINodesInPath4Write(dst, false);
}
boolean undoRemoveDst = false;
INode removedDst = null;
long removedNum = 0;
@ -846,23 +632,9 @@ public class FSDirectory implements Closeable {
undoRemoveDst = true;
}
}
srcChild = srcIIP.getLastINode();
final byte[] dstChildName = dstIIP.getLastLocalName();
final INode toDst;
if (withCount == null) {
srcChild.setLocalName(dstChildName);
toDst = srcChild;
} else {
withCount.getReferredINode().setLocalName(dstChildName);
int dstSnapshotId = dstIIP.getLatestSnapshotId();
toDst = new INodeReference.DstReference(
dstIIP.getINode(-2).asDirectory(), withCount, dstSnapshotId);
}
// add src as dst to complete rename
if (addLastINodeNoQuotaCheck(dstIIP, toDst)) {
if (tx.addSourceToDestination()) {
undoRemoveSrc = false;
if (NameNode.stateChangeLog.isDebugEnabled()) {
NameNode.stateChangeLog.debug(
@ -870,12 +642,7 @@ public class FSDirectory implements Closeable {
+ " is renamed to " + dst);
}
final INode srcParent = srcIIP.getINode(-2);
srcParent.updateModificationTime(timestamp, srcIIP.getLatestSnapshotId());
dstParent = dstIIP.getINode(-2);
dstParent.updateModificationTime(timestamp, dstIIP.getLatestSnapshotId());
// update moved lease with new filename
getFSNamesystem().unprotectedChangeLease(src, dst);
tx.updateMtimeAndLease(timestamp);
// Collect the blocks and remove the lease for previous dst
long filesDeleted = -1;
@ -897,47 +664,15 @@ public class FSDirectory implements Closeable {
// deleted. Need to update the SnapshotManager.
namesystem.removeSnapshottableDirs(snapshottableDirs);
}
// update the quota usage in src tree
if (isSrcInSnapshot) {
// get the counts after rename
Quota.Counts newSrcCounts = srcChild.computeQuotaUsage(
Quota.Counts.newInstance(), false);
newSrcCounts.subtract(oldSrcCounts);
srcParent.addSpaceConsumed(newSrcCounts.get(Quota.NAMESPACE),
newSrcCounts.get(Quota.DISKSPACE), false);
}
tx.updateQuotasInSourceTree();
return filesDeleted >= 0;
}
} finally {
if (undoRemoveSrc) {
// Rename failed - restore src
final INodeDirectory srcParent = srcIIP.getINode(-2).asDirectory();
final INode oldSrcChild = srcChild;
// put it back
if (withCount == null) {
srcChild.setLocalName(srcChildName);
} else if (!srcChildIsReference) { // src must be in snapshot
// the withCount node will no longer be used thus no need to update
// its reference number here
srcChild = withCount.getReferredINode();
srcChild.setLocalName(srcChildName);
} else {
withCount.removeReference(oldSrcChild.asReference());
srcChild = new INodeReference.DstReference(
srcParent, withCount, srcRefDstSnapshot);
withCount.getReferredINode().setLocalName(srcChildName);
}
if (srcParent.isWithSnapshot()) {
srcParent.undoRename4ScrParent(oldSrcChild.asReference(), srcChild);
} else {
// srcParent is not an INodeDirectoryWithSnapshot, we only need to add
// the srcChild back
addLastINodeNoQuotaCheck(srcIIP, srcChild);
}
tx.restoreSource();
}
if (undoRemoveDst) {
// Rename failed - restore dst
if (dstParent.isDirectory() && dstParent.asDirectory().isWithSnapshot()) {
@ -958,7 +693,200 @@ public class FSDirectory implements Closeable {
+ "failed to rename " + src + " to " + dst);
throw new IOException("rename from " + src + " to " + dst + " failed.");
}
private static void validateRenameOverwrite(String src, String dst,
boolean overwrite,
INode srcInode, INode dstInode)
throws IOException {
String error;// It's OK to rename a file to a symlink and vice versa
if (dstInode.isDirectory() != srcInode.isDirectory()) {
error = "Source " + src + " and destination " + dst
+ " must both be directories";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new IOException(error);
}
if (!overwrite) { // If destination exists, overwrite flag must be true
error = "rename destination " + dst + " already exists";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new FileAlreadyExistsException(error);
}
if (dstInode.isDirectory()) {
final ReadOnlyList<INode> children = dstInode.asDirectory()
.getChildrenList(Snapshot.CURRENT_STATE_ID);
if (!children.isEmpty()) {
error = "rename destination directory is not empty: " + dst;
NameNode.stateChangeLog.warn(
"DIR* FSDirectory.unprotectedRenameTo: " + error);
throw new IOException(error);
}
}
}
private static void validateRenameDestination(String src, String dst, INode srcInode)
throws IOException {
String error;
if (srcInode.isSymlink() &&
dst.equals(srcInode.asSymlink().getSymlinkString())) {
throw new FileAlreadyExistsException(
"Cannot rename symlink "+src+" to its target "+dst);
}
// dst cannot be a directory or a file under src
if (dst.startsWith(src) &&
dst.charAt(src.length()) == Path.SEPARATOR_CHAR) {
error = "Rename destination " + dst
+ " is a directory or file under source " + src;
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new IOException(error);
}
}
private static void validateRenameSource(String src, INodesInPath srcIIP)
throws IOException {
String error;
final INode srcInode = srcIIP.getLastINode();
// validate source
if (srcInode == null) {
error = "rename source " + src + " is not found.";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new FileNotFoundException(error);
}
if (srcIIP.getINodes().length == 1) {
error = "rename source cannot be the root";
NameNode.stateChangeLog.warn("DIR* FSDirectory.unprotectedRenameTo: "
+ error);
throw new IOException(error);
}
// srcInode and its subtree cannot contain snapshottable directories with
// snapshots
checkSnapshot(srcInode, null);
}
private class RenameOperation {
private final INodesInPath srcIIP;
private final INodesInPath dstIIP;
private final String src;
private final String dst;
private INode srcChild;
private final INodeReference.WithCount withCount;
private final int srcRefDstSnapshot;
private final INodeDirectory srcParent;
private final byte[] srcChildName;
private final boolean isSrcInSnapshot;
private final boolean srcChildIsReference;
private final Quota.Counts oldSrcCounts;
private RenameOperation(String src, String dst, INodesInPath srcIIP, INodesInPath dstIIP)
throws QuotaExceededException {
this.srcIIP = srcIIP;
this.dstIIP = dstIIP;
this.src = src;
this.dst = dst;
srcChild = srcIIP.getLastINode();
srcChildName = srcChild.getLocalNameBytes();
isSrcInSnapshot = srcChild.isInLatestSnapshot(
srcIIP.getLatestSnapshotId());
srcChildIsReference = srcChild.isReference();
srcParent = srcIIP.getINode(-2).asDirectory();
// Record the snapshot on srcChild. After the rename, before any new
// snapshot is taken on the dst tree, changes will be recorded in the latest
// snapshot of the src tree.
if (isSrcInSnapshot) {
srcChild = srcChild.recordModification(srcIIP.getLatestSnapshotId());
}
// check srcChild for reference
srcRefDstSnapshot = srcChildIsReference ? srcChild.asReference()
.getDstSnapshotId() : Snapshot.CURRENT_STATE_ID;
oldSrcCounts = Quota.Counts.newInstance();
if (isSrcInSnapshot) {
final INodeReference.WithName withName = srcIIP.getINode(-2).asDirectory()
.replaceChild4ReferenceWithName(srcChild, srcIIP.getLatestSnapshotId());
withCount = (INodeReference.WithCount) withName.getReferredINode();
srcChild = withName;
srcIIP.setLastINode(srcChild);
// get the counts before rename
withCount.getReferredINode().computeQuotaUsage(oldSrcCounts, true);
} else if (srcChildIsReference) {
// srcChild is reference but srcChild is not in latest snapshot
withCount = (WithCount) srcChild.asReference().getReferredINode();
} else {
withCount = null;
}
}
boolean addSourceToDestination() {
final INode dstParent = dstIIP.getINode(-2);
srcChild = srcIIP.getLastINode();
final byte[] dstChildName = dstIIP.getLastLocalName();
final INode toDst;
if (withCount == null) {
srcChild.setLocalName(dstChildName);
toDst = srcChild;
} else {
withCount.getReferredINode().setLocalName(dstChildName);
int dstSnapshotId = dstIIP.getLatestSnapshotId();
toDst = new INodeReference.DstReference(
dstParent.asDirectory(), withCount, dstSnapshotId);
}
return addLastINodeNoQuotaCheck(dstIIP, toDst);
}
void updateMtimeAndLease(long timestamp) throws QuotaExceededException {
srcParent.updateModificationTime(timestamp, srcIIP.getLatestSnapshotId());
final INode dstParent = dstIIP.getINode(-2);
dstParent.updateModificationTime(timestamp, dstIIP.getLatestSnapshotId());
// update moved lease with new filename
getFSNamesystem().unprotectedChangeLease(src, dst);
}
void restoreSource() throws QuotaExceededException {
// Rename failed - restore src
final INode oldSrcChild = srcChild;
// put it back
if (withCount == null) {
srcChild.setLocalName(srcChildName);
} else if (!srcChildIsReference) { // src must be in snapshot
// the withCount node will no longer be used thus no need to update
// its reference number here
srcChild = withCount.getReferredINode();
srcChild.setLocalName(srcChildName);
} else {
withCount.removeReference(oldSrcChild.asReference());
srcChild = new INodeReference.DstReference(
srcParent, withCount, srcRefDstSnapshot);
withCount.getReferredINode().setLocalName(srcChildName);
}
if (isSrcInSnapshot) {
srcParent.undoRename4ScrParent(oldSrcChild.asReference(), srcChild);
} else {
// srcParent is not an INodeDirectoryWithSnapshot, we only need to add
// the srcChild back
addLastINodeNoQuotaCheck(srcIIP, srcChild);
}
}
void updateQuotasInSourceTree() throws QuotaExceededException {
// update the quota usage in src tree
if (isSrcInSnapshot) {
// get the counts after rename
Quota.Counts newSrcCounts = srcChild.computeQuotaUsage(
Quota.Counts.newInstance(), false);
newSrcCounts.subtract(oldSrcCounts);
srcParent.addSpaceConsumed(newSrcCounts.get(Quota.NAMESPACE),
newSrcCounts.get(Quota.DISKSPACE), false);
}
}
}
/**
* Set file replication
*
@ -1332,14 +1260,14 @@ public class FSDirectory implements Closeable {
* but do not have snapshots yet
*/
private static void checkSnapshot(INode target,
List<INodeDirectorySnapshottable> snapshottableDirs) throws IOException {
List<INodeDirectorySnapshottable> snapshottableDirs) throws SnapshotException {
if (target.isDirectory()) {
INodeDirectory targetDir = target.asDirectory();
if (targetDir.isSnapshottable()) {
INodeDirectorySnapshottable ssTargetDir =
(INodeDirectorySnapshottable) targetDir;
if (ssTargetDir.getNumSnapshots() > 0) {
throw new IOException("The directory " + ssTargetDir.getFullPathName()
throw new SnapshotException("The directory " + ssTargetDir.getFullPathName()
+ " cannot be deleted since " + ssTargetDir.getFullPathName()
+ " is snapshottable and already has snapshots");
} else {
@ -2053,10 +1981,6 @@ public class FSDirectory implements Closeable {
if (!parent.removeChild(last, latestSnapshot)) {
return -1;
}
INodeDirectory newParent = last.getParent();
if (parent != newParent) {
iip.setINode(-2, newParent);
}
if (!last.isInLatestSnapshot(latestSnapshot)) {
final Quota.Counts counts = last.computeQuotaUsage();