private Dir LoadDir(uint dinode, Dir parent, string name)
{
// 100M blocks is enough for a 6TB file.
const int MAX_BLOCKS = 100_000_000;
var ret = new Dir()
{
name = name, parent = parent
};
var ino = dinodes[dinode];
var postLoad = new List <Func <Dir> >();
var blocks = (int)ino.Blocks;
if (blocks < 1 || ino.StartBlock < 1 || ino.StartBlock > MAX_BLOCKS || blocks > MAX_BLOCKS)
{
throw new Exception($"inode {dinode} is corrupt. ");
}
foreach (var x in Enumerable.Range(ino.StartBlock, blocks))
{
var position = hdr.BlockSize * x;
reader.Read(position, sectorBuf, 0, sectorBuf.Length);
sectorStream.Position = 0;
while (position < hdr.BlockSize * (x + 1))
{
var dirent = PfsDirent.ReadFromStream(sectorStream);
if (dirent.EntSize == 0)
{
break;
}
switch (dirent.Type)
{
case DirentType.File:
ret.children.Add(LoadFile(dirent.InodeNumber, ret, dirent.Name));
break;
case DirentType.Directory:
postLoad.Add(() => LoadDir(dirent.InodeNumber, ret, dirent.Name));
break;
case DirentType.Dot:
break;
case DirentType.DotDot:
break;
default:
break;
}
position += dirent.EntSize;
}
}
foreach (var p in postLoad)
{
ret.children.Add(p());
}
return(ret);
}
private Dir LoadDir(uint dinode, Node parent, string name)
{
var ret = new Dir()
{
name = name, parent = parent
};
var ino = dinodes[dinode];
var postLoad = new List <Func <Dir> >();
foreach (var x in Enumerable.Range(ino.StartBlock, (int)ino.Blocks))
{
var position = hdr.BlockSize * x;
reader.Read(position, sectorBuf, 0, sectorBuf.Length);
sectorStream.Position = 0;
while (position < hdr.BlockSize * (x + 1))
{
var dirent = PfsDirent.ReadFromStream(sectorStream);
if (dirent.EntSize == 0)
{
break;
}
switch (dirent.Type)
{
case DirentType.File:
ret.children.Add(LoadFile(dirent.InodeNumber, ret, dirent.Name));
break;
case DirentType.Directory:
postLoad.Add(() => LoadDir(dirent.InodeNumber, ret, dirent.Name));
break;
case DirentType.Dot:
break;
case DirentType.DotDot:
break;
default:
break;
}
position += dirent.EntSize;
}
}
foreach (var p in postLoad)
{
ret.children.Add(p());
}
return(ret);
}
