/// <exception cref="System.IO.IOException"/>
private void SerializeFileDiffList(INodeFile file, OutputStream @out)
{
FileWithSnapshotFeature sf = file.GetFileWithSnapshotFeature();
if (sf != null)
{
IList <FileDiff> diffList = sf.GetDiffs().AsList();
FsImageProto.SnapshotDiffSection.DiffEntry entry = ((FsImageProto.SnapshotDiffSection.DiffEntry
)FsImageProto.SnapshotDiffSection.DiffEntry.NewBuilder().SetInodeId(file.GetId()
).SetType(FsImageProto.SnapshotDiffSection.DiffEntry.Type.Filediff).SetNumOfDiff
(diffList.Count).Build());
entry.WriteDelimitedTo(@out);
for (int i = diffList.Count - 1; i >= 0; i--)
{
FileDiff diff = diffList[i];
FsImageProto.SnapshotDiffSection.FileDiff.Builder fb = FsImageProto.SnapshotDiffSection.FileDiff
.NewBuilder().SetSnapshotId(diff.GetSnapshotId()).SetFileSize(diff.GetFileSize()
);
if (diff.GetBlocks() != null)
{
foreach (Block block in diff.GetBlocks())
{
fb.AddBlocks(PBHelper.Convert(block));
}
}
INodeFileAttributes copy = diff.snapshotINode;
if (copy != null)
{
fb.SetName(ByteString.CopyFrom(copy.GetLocalNameBytes())).SetSnapshotCopy(FSImageFormatPBINode.Saver.BuildINodeFile
(copy, parent.GetSaverContext()));
}
((FsImageProto.SnapshotDiffSection.FileDiff)fb.Build()).WriteDelimitedTo(@out);
}
}
}
/// <summary>
/// If some blocks at the end of the block list no longer belongs to
/// any inode, collect them and update the block list.
/// </summary>
public virtual void CollectBlocksAndClear(BlockStoragePolicySuite bsps, INodeFile
file, INode.BlocksMapUpdateInfo info, IList <INode> removedINodes)
{
// check if everything is deleted.
if (IsCurrentFileDeleted() && GetDiffs().AsList().IsEmpty())
{
file.DestroyAndCollectBlocks(bsps, info, removedINodes);
return;
}
// find max file size.
long max;
FileDiff diff = GetDiffs().GetLast();
if (IsCurrentFileDeleted())
{
max = diff == null ? 0 : diff.GetFileSize();
}
else
{
max = file.ComputeFileSize();
}
// Collect blocks that should be deleted
FileDiff last = diffs.GetLast();
BlockInfoContiguous[] snapshotBlocks = last == null ? null : last.GetBlocks();
if (snapshotBlocks == null)
{
file.CollectBlocksBeyondMax(max, info);
}
else
{
file.CollectBlocksBeyondSnapshot(snapshotBlocks, info);
}
}