public XenOvfTransport.DiskStream Connect(XenAPI.Session xenSession, string vdiuuid, bool read_only)
{
int iSCSIConnectRetry = Properties.Settings.Default.iSCSIConnectRetry;
bool iSCSIConnected = false;
StartiScsiTarget(xenSession, vdiuuid, read_only);
string ipaddress = ParsePluginRecordFor("ip");
int ipport = Convert.ToInt32(ParsePluginRecordFor("port"));
string targetGroupTag = ParsePluginRecordFor("isci_lun");
if (ipaddress == null)
{
throw new NullReferenceException(Messages.ISCSI_ERROR_NO_IPADDRESS);
}
string username = ParsePluginRecordFor("username");
string password = ParsePluginRecordFor("password");
Initiator initiator = new Initiator();
if (username != null && password != null)
initiator.SetCredentials(username, password);
while (!iSCSIConnected && iSCSIConnectRetry > 0)
{
if (Cancel)
throw new OperationCanceledException();
try
{
Log.Debug(Messages.FILES_TRANSPORT_SETUP, vdiuuid);
TargetAddress ta = new TargetAddress(ipaddress, ipport, targetGroupTag);
TargetInfo[] targets = initiator.GetTargets(ta);
Log.Info("iSCSI.Connect found {0} targets, connecting to: {1}", targets.Length, targets[0].Name);
_iscsisession = initiator.ConnectTo(targets[0]);
iSCSIConnected = true;
}
catch (Exception ex)
{
Log.Error("{0} {1}", Messages.ISCSI_ERROR, ex.Message);
Thread.Sleep(new TimeSpan(0, 0, 5));
iSCSIConnectRetry--;
}
}
if (!iSCSIConnected)
{
throw new Exception(Messages.ISCSI_ERROR);
}
long lun = 0;
try
{
LunInfo[] luns = _iscsisession.GetLuns();
if (_newscsi)
{
long lunIdx = Convert.ToInt32(ParsePluginRecordFor("iscsi_lun"));
lun = luns[lunIdx].Lun;
}
Log.Info("iSCSI.Connect found {0} luns, looking for block storage.", luns.Length);
foreach (LunInfo iLun in luns)
{
if (iLun.DeviceType == LunClass.BlockStorage)
{
if (_newscsi && iLun.Lun == lun) { break; }
lun = iLun.Lun;
break;
}
}
}
catch (Exception)
{
Log.Error("Could not determin LUN");
throw;
}
Log.Info("iSCSI.Connect, found on lun: {0}", lun);
try
{
iDisk = _iscsisession.OpenDisk(lun);
// Use our own DiskStream class to workaround a bug in DiscUtils.DiskStream.
return new XenOvfTransport.DiskStream(_iscsisession, lun, (read_only ? FileAccess.Read : FileAccess.ReadWrite));
}
catch (Exception ex)
{
Log.Error("{0} {1}", Messages.ISCSI_ERROR_CANNOT_OPEN_DISK, ex.Message);
throw new Exception(Messages.ISCSI_ERROR_CANNOT_OPEN_DISK, ex);
}
}
public void Disconnect(XenAPI.Session xenSession)
{
try
{
if (iDisk != null)
iDisk.Dispose();
iDisk = null;
}
catch (Exception exn)
{
Log.Warning("Exception when disposing iDisk", exn);
}
try
{
if (_iscsisession != null)
_iscsisession.Dispose();
_iscsisession = null;
}
catch (Exception exn)
{
Log.Warning("Exception when disposing iscsisession", exn);
}
StopiScsiTarget(xenSession);
}
public void Disconnect(XenAPI.Session xenSession)
{
try
{
if (iDisk != null)
iDisk.Dispose();
iDisk = null;
}
catch (Exception exn)
{
log.DebugFormat("Failed to dispose iDisk: {0}. Continuing.", exn);
}
try
{
if (_iscsisession != null)
_iscsisession.Dispose();
_iscsisession = null;
}
catch (Exception exn)
{
log.DebugFormat("Failed to dispose iScsiSession: {0}. Continuing.", exn);
}
StopiScsiTarget(xenSession);
}