public override bool InitServer()
{
System.Diagnostics.Debugger.Log(0, "disk", "Disk driver started");
/* Get our ports and interrupt */
foreach (var r in root)
{
if (r.Name == "blockdev" && (r.Value is vfs.BlockDevice))
{
bdev = r.Value as vfs.BlockDevice;
}
}
if (bdev == null)
{
System.Diagnostics.Debugger.Log(0, "disk", "No blockdev property found");
return(false);
}
/* Get the first sector of the device */
byte[] sect_1 = new byte[bdev.SectorSize];
tysos.lib.MonoIOError err;
long read = bdev.Read(0, 1, sect_1, 0, out err);
if (err != MonoIOError.ERROR_SUCCESS)
{
System.Diagnostics.Debugger.Log(0, "disk", "Attempt to read first sector failed: bytes_read: " + read.ToString() + ", error: " + err.ToString());
return(false);
}
/*StringBuilder sb = null;
* for(int i = 0; i < bdev.SectorSize; i++)
* {
* if(i % 8 == 0)
* {
* if (sb != null)
* System.Diagnostics.Debugger.Log(0, "disk", sb.ToString());
* sb = new StringBuilder();
* sb.Append(i.ToString() + ": ");
* }
*
* sb.Append(sect_1[i].ToString("X2"));
* sb.Append(" ");
* }
*
* if (sb != null)
* System.Diagnostics.Debugger.Log(0, "disk", sb.ToString()); */
/* Try and identify the disk */
if (bdev.SectorSize < 512 || sect_1[510] != 0x55 || sect_1[511] != 0xaa)
{
System.Diagnostics.Debugger.Log(0, "disk", "Treating as one big partition (" +
"SectorSize: " + bdev.SectorSize.ToString() +
", signature: " + sect_1[510].ToString("X2") + " " + sect_1[511].ToString("X2") + ")");
/* Treat as one big partition */
string part_type = IdentifyPartition(sect_1);
List <File.Property> props = new List <File.Property>();
props.Add(new File.Property {
Name = "blockdev", Value = bdev
});
if (part_type != null)
{
props.Add(new File.Property {
Name = "driver", Value = part_type
});
}
children.Add("volume", props);
}
else
{
if (sect_1[0] == 0xeb || sect_1[0] == 0xe9)
{
System.Diagnostics.Debugger.Log(0, "disk", "Treating as VBR");
/* VBR signature - treat as one big partition */
string part_type = IdentifyPartition(sect_1);
List <File.Property> props = new List <File.Property>();
props.Add(new File.Property {
Name = "blockdev", Value = bdev
});
if (part_type != null)
{
props.Add(new File.Property {
Name = "driver", Value = part_type
});
}
children.Add("volume", props);
}
else
{
/* Try and treat as a MBR if the partition entries appear valid */
bool is_valid = true;
bool is_gpt = false;
for (int i = 0; i < 4; i++)
{
int offset = 446 + i * 16;
byte ptype = sect_1[offset + 4];
uint lba = BitConverter.ToUInt32(sect_1, offset + 8);
uint sect_count = BitConverter.ToUInt32(sect_1, offset + 0xc);
System.Diagnostics.Debugger.Log(0, "disk", "MBR: partition " + i.ToString() +
": ptype: " + ptype.ToString("X2") +
", lba: " + lba.ToString() +
", sect_count: " + sect_count.ToString());
if (ptype == 0)
{
continue;
}
if (ptype == 0xee)
{
is_gpt = true;
break;
}
if (lba + sect_count > bdev.SectorCount)
{
is_valid = false;
break;
}
else
{
/* Load up first sector of partition to identify type */
byte[] part_sect_1 = new byte[bdev.SectorSize];
read = bdev.Read(lba, 1, part_sect_1, 0, out err);
string part_type;
if (err != MonoIOError.ERROR_SUCCESS || read == bdev.SectorSize ||
(part_type = IdentifyPartition(part_sect_1)) == null)
{
/* There was an issue loading the first sector - resort to using
* MBR partition type */
part_type = IdentifyPartition(ptype);
}
/* Create a child object */
List <File.Property> props = new List <File.Property>();
props.Add(new File.Property {
Name = "blockdev", Value = new BlockDevice(bdev, lba, sect_count)
});
if (part_type != null)
{
props.Add(new File.Property {
Name = "driver", Value = part_type
});
}
children.Add("volume_" + i.ToString(), props);
System.Diagnostics.Debugger.Log(0, "disk", "MBR: partition " + i.ToString() +
": ptype: " + (part_type == null ? "null" : part_type));
}
}
if (is_gpt)
{
children.Clear();
throw new NotImplementedException("GPT not implemented");
}
if (is_valid == false)
{
/* The MBR was not valid, treat it as one large partition */
System.Diagnostics.Debugger.Log(0, "disk", "Invalid MBR - treating as one big partition");
children.Clear();
string part_type = IdentifyPartition(sect_1);
List <File.Property> props = new List <File.Property>();
props.Add(new File.Property {
Name = "blockdev", Value = bdev
});
if (part_type != null)
{
props.Add(new File.Property {
Name = "driver", Value = part_type
});
}
children.Add("volume", props);
}
}
}
/* Dump the identified partitions */
foreach (var part in children)
{
System.Diagnostics.Debugger.Log(0, "disk", part.Key);
foreach (var prop in part.Value)
{
System.Diagnostics.Debugger.Log(0, "disk", " " + prop.Name + ": " + prop.Value.ToString());
}
}
root.Add(new File.Property {
Name = "class", Value = "block"
});
Tags.Add("class");
return(true);
}
internal BlockDevice(vfs.BlockDevice Parent, long Lba, long LbaLen)
{
parent = Parent;
lba = Lba;
lba_len = LbaLen;
}
