public void GetFreeInodeTest()
{
SuperBlock superBlock = new SuperBlock()
{
FreeBlockSize = 3,
FreeBlock = new List <int>()
{
1, 2, 3
},
FreeInodeSize = 3,
FreeInode = new List <int>()
{
1, 2, 3
}
};
diskAdapterService.WriteSuperBlock(superBlock);
int tFreeInode = diskManagementService.GetFreeInode(FileMode.Text);
Assert.AreEqual(tFreeInode, 1);
DiskInode diskInode = diskAdapterService.ReadDiskInode(tFreeInode);
Assert.AreEqual(diskInode.Size, 0);
Assert.AreEqual(diskInode.Number, 0);
Assert.AreEqual(diskInode.Mode, 1);
}
public void WriteReadInodeTest()
{
DiskInode diskInode = new DiskInode()
{
Number = 10,
Mode = 1,
Size = 10,
Addrs = new List <int>()
{
1, 2, 4, 6, 13, 567, 111, 121, 111, 90, 11, 22, 33
}
};
DiskAdapterService diskAdapterService = new DiskAdapterService(_diskConnectService);
diskAdapterService.WriteDiskInode(diskInode, 6);
var reDiskInode = diskAdapterService.ReadDiskInode(6);
Assert.AreEqual(reDiskInode.Number, diskInode.Number);
Assert.AreEqual(reDiskInode.Mode, diskInode.Mode);
Assert.AreEqual(reDiskInode.Size, diskInode.Size);
for (int i = 0; i < Constant.Naddr; i++)
{
Assert.AreEqual(reDiskInode.Addrs[i], diskInode.Addrs[i]);
}
}
public DiskInode ReadDiskInode(int inodeIndex)
{
int index;
//i节点容器
DiskInode diskInode = new DiskInode();
diskInode.Addrs = new List <int>();
byte[] bytes = new byte[Constant.Constant.Dinodesize];
//读虚拟磁盘
fileStream = _diskConnectService.GetFileStream();
fileStream.Seek(
Constant.Constant.Dinodestart + Constant.Constant.Dinodesize * inodeIndex,
SeekOrigin.Begin
);
fileStream.Read(bytes, 0, Constant.Constant.Dinodesize);
fileStream.Close();
//字节转换
diskInode.Number = BitConverter.ToInt32(bytes, 0);
diskInode.Mode = BitConverter.ToInt32(bytes, 4);
diskInode.Size = BitConverter.ToInt32(bytes, 8);
for (index = 0; index < Constant.Constant.Naddr; index++)
{
diskInode.Addrs.Add(BitConverter.ToInt32(bytes, 12 + 4 * index));
}
return(diskInode);
}
//TODO 未测试
public void RetrieveInode(int index)
{
SuperBlock superBlock = _diskAdapterService.ReadSuperBlock();
DiskInode diskInode = _diskAdapterService.ReadDiskInode(index);
superBlock.FreeInodeSize++;
superBlock.FreeInode.Add(index);
_diskAdapterService.WriteSuperBlock(superBlock);
RetrieveBlocks(diskInode.Addrs);
}
private byte[] ReadBiteFile(int index)
{
DiskInode diskInode = _diskAdapterService.ReadDiskInode(index);
byte[] bytes = new byte[diskInode.Size];
int i, count = 0;
//取该文件所有块
for (i = 0; i < diskInode.Number; i++)
{
Array.Copy(_diskAdapterService.ReadDataBlock(diskInode.Addrs[i], DataMode.Bytes).Bytes.ToArray(),
0, bytes, count,
diskInode.Size - count >= Constant.Constant.Blocksize ? Constant.Constant.Blocksize : diskInode.Size - count);
count += Constant.Constant.Blocksize;
}
return(bytes);
}
public void WriteDir(Dir dir, int index)
{
DiskInode diskInode = _diskAdapterService.ReadDiskInode(index);
byte[] bytes =
ByteConverter.ByteConverter.byteConverter.ToBytes(dir);
RetrieveBlocks(diskInode.Addrs);
int size = (int)(bytes.Length / Constant.Constant.Blocksize) + 1;
List <int> freeBlock = GetFreeBlocks(size);
//文件内容写入磁盘
WriteBiteFile(freeBlock, bytes);
//修改i节点并写回
diskInode.Size = bytes.Length;
diskInode.Number = size;
diskInode.Addrs = freeBlock;
_diskAdapterService.WriteDiskInode(diskInode, index);
}
public void WriteDiskInode(DiskInode diskInode, int index)
{
//i节点字节化
byte[] bytes = new byte[Constant.Constant.Blocksize];
int count = 0;
List <int> blockInfo = new List <int>();
blockInfo.Add(diskInode.Number);
blockInfo.Add(diskInode.Mode);
blockInfo.Add(diskInode.Size);
blockInfo.AddRange(diskInode.Addrs);
blockInfo.ForEach(delegate(int inodeIndex) {
Array.Copy(BitConverter.GetBytes(inodeIndex),
0, bytes, count, 4);
count += 4;
});
//i节点写入虚拟磁盘
fileStream = _diskConnectService.GetFileStream();
fileStream.Seek(
Constant.Constant.Dinodestart + Constant.Constant.Dinodesize * index,
SeekOrigin.Begin);
fileStream.Write(bytes, 0, bytes.Length);
fileStream.Close();
}
