// Helper function that reads in an INodeUnderConstruction
// from the input stream
//
/// <exception cref="System.IO.IOException"/>
internal static INodeFile ReadINodeUnderConstruction(DataInput @in, FSNamesystem
fsNamesys, int imgVersion)
{
byte[] name = ReadBytes(@in);
long inodeId = NameNodeLayoutVersion.Supports(LayoutVersion.Feature.AddInodeId, imgVersion
) ? @in.ReadLong() : fsNamesys.dir.AllocateNewInodeId();
short blockReplication = @in.ReadShort();
long modificationTime = @in.ReadLong();
long preferredBlockSize = @in.ReadLong();
int numBlocks = @in.ReadInt();
BlockInfoContiguous[] blocks = new BlockInfoContiguous[numBlocks];
Block blk = new Block();
int i = 0;
for (; i < numBlocks - 1; i++)
{
blk.ReadFields(@in);
blocks[i] = new BlockInfoContiguous(blk, blockReplication);
}
// last block is UNDER_CONSTRUCTION
if (numBlocks > 0)
{
blk.ReadFields(@in);
blocks[i] = new BlockInfoContiguousUnderConstruction(blk, blockReplication, HdfsServerConstants.BlockUCState
.UnderConstruction, null);
}
PermissionStatus perm = PermissionStatus.Read(@in);
string clientName = ReadString(@in);
string clientMachine = ReadString(@in);
// We previously stored locations for the last block, now we
// just record that there are none
int numLocs = @in.ReadInt();
System.Diagnostics.Debug.Assert(numLocs == 0, "Unexpected block locations");
// Images in the pre-protobuf format will not have the lazyPersist flag,
// so it is safe to pass false always.
INodeFile file = new INodeFile(inodeId, name, perm, modificationTime, modificationTime
, blocks, blockReplication, preferredBlockSize, unchecked ((byte)0));
file.ToUnderConstruction(clientName, clientMachine);
return(file);
}