MdeModulePkg/Universal/Network/IScsiDxe/IScsiDriver.c

   1 /** @file
   2   The entry point of IScsi driver.
   3
   4 Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "IScsiImpl.h"
  16
  17 EFI_DRIVER_BINDING_PROTOCOL gIScsiDriverBinding = {
  18   IScsiDriverBindingSupported,
  19   IScsiDriverBindingStart,
  20   IScsiDriverBindingStop,
  21   0xa,
  22   NULL,
  23   NULL
  24 };
  25
  26 /**
  27   Tests to see if this driver supports the RemainingDevicePath.
  28
  29   @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.  This
  30                                    parameter is ignored by device drivers, and is optional for bus
  31                                    drivers. For bus drivers, if this parameter is not NULL, then
  32                                    the bus driver must determine if the bus controller specified
  33                                    by ControllerHandle and the child controller specified
  34                                    by RemainingDevicePath are both supported by this
  35                                    bus driver.
  36
  37   @retval EFI_SUCCESS              The RemainingDevicePath is supported or NULL.
  38   @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
  39                                    RemainingDevicePath is not supported by the driver specified by This.
  40 **/
  41 EFI_STATUS
  42 IScsiIsDevicePathSupported (
  43   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
  44   )
  45 {
  46   EFI_DEVICE_PATH_PROTOCOL  *CurrentDevicePath;
  47
  48   CurrentDevicePath = RemainingDevicePath;
  49   if (CurrentDevicePath != NULL) {
  50     while (!IsDevicePathEnd (CurrentDevicePath)) {
  51       if ((CurrentDevicePath->Type == MESSAGING_DEVICE_PATH) && (CurrentDevicePath->SubType == MSG_ISCSI_DP)) {
  52         return EFI_SUCCESS;
  53       }
  54
  55       CurrentDevicePath = NextDevicePathNode (CurrentDevicePath);
  56     }
  57
  58     return EFI_UNSUPPORTED;
  59   }
  60
  61   return EFI_SUCCESS;
  62 }
  63
  64 /**
  65   Tests to see if this driver supports a given controller. If a child device is provided,
  66   it further tests to see if this driver supports creating a handle for the specified child device.
  67
  68   @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
  69   @param[in]  ControllerHandle     The handle of the controller to test. This handle
  70                                    must support a protocol interface that supplies
  71                                    an I/O abstraction to the driver.
  72   @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.
  73                                    This parameter is ignored by device drivers, and is optional for bus drivers.
  74
  75
  76   @retval EFI_SUCCESS              The device specified by ControllerHandle and
  77                                    RemainingDevicePath is supported by the driver specified by This.
  78   @retval EFI_ALREADY_STARTED      The device specified by ControllerHandle and
  79                                    RemainingDevicePath is already being managed by the driver
  80                                    specified by This.
  81   @retval EFI_ACCESS_DENIED        The device specified by ControllerHandle and
  82                                    RemainingDevicePath is already being managed by a different
  83                                    driver or an application that requires exclusive acces.
  84                                    Currently not implemented.
  85   @retval EFI_UNSUPPORTED          The device specified by ControllerHandle and
  86                                    RemainingDevicePath is not supported by the driver specified by This.
  87 **/
  88 EFI_STATUS
  89 EFIAPI
  90 IScsiDriverBindingSupported (
  91   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
  92   IN EFI_HANDLE                   ControllerHandle,
  93   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
  94   )
  95 {
  96   EFI_STATUS                Status;
  97
  98   Status = gBS->OpenProtocol (
  99                   ControllerHandle,
 100                   &gEfiCallerIdGuid,
 101                   NULL,
 102                   This->DriverBindingHandle,
 103                   ControllerHandle,
 104                   EFI_OPEN_PROTOCOL_TEST_PROTOCOL
 105                   );
 106   if (!EFI_ERROR (Status)) {
 107     return EFI_ALREADY_STARTED;
 108   }
 109
 110   Status = gBS->OpenProtocol (
 111                   ControllerHandle,
 112                   &gEfiTcp4ServiceBindingProtocolGuid,
 113                   NULL,
 114                   This->DriverBindingHandle,
 115                   ControllerHandle,
 116                   EFI_OPEN_PROTOCOL_TEST_PROTOCOL
 117                   );
 118   if (EFI_ERROR (Status)) {
 119     return EFI_UNSUPPORTED;
 120   }
 121
 122   Status = IScsiIsDevicePathSupported (RemainingDevicePath);
 123   if (EFI_ERROR (Status)) {
 124     return EFI_UNSUPPORTED;
 125   }
 126
 127   if (IScsiDhcpIsConfigured (ControllerHandle)) {
 128     Status = gBS->OpenProtocol (
 129                     ControllerHandle,
 130                     &gEfiDhcp4ServiceBindingProtocolGuid,
 131                     NULL,
 132                     This->DriverBindingHandle,
 133                     ControllerHandle,
 134                     EFI_OPEN_PROTOCOL_TEST_PROTOCOL
 135                     );
 136     if (EFI_ERROR (Status)) {
 137       return EFI_UNSUPPORTED;
 138     }
 139   }
 140
 141   return EFI_SUCCESS;
 142 }
 143
 144 /**
 145   Start this driver on ControllerHandle.
 146
 147   The Start() function is designed to be invoked from the EFI boot service ConnectController().
 148   As a result, much of the error checking on the parameters to Start() has been moved into this
 149   common boot service. It is legal to call Start() from other locations, but the following calling
 150   restrictions must be followed or the system behavior will not be deterministic.
 151   1. ControllerHandle must be a valid EFI_HANDLE.
 152   2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned
 153      EFI_DEVICE_PATH_PROTOCOL.
 154   3. Prior to calling Start(), the Supported() function for the driver specified by This must
 155      have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS.
 156
 157   @param[in]  This                 A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
 158   @param[in]  ControllerHandle     The handle of the controller to start. This handle
 159                                    must support a protocol interface that supplies
 160                                    an I/O abstraction to the driver.
 161   @param[in]  RemainingDevicePath  A pointer to the remaining portion of a device path.
 162                                    This parameter is ignored by device drivers, and is optional for bus drivers.
 163
 164   @retval EFI_SUCCESS              The device was started.
 165   @retval EFI_DEVICE_ERROR         The device could not be started due to a device error.
 166                                    Currently not implemented.
 167   @retval EFI_OUT_OF_RESOURCES     The request could not be completed due to a lack of resources.
 168   @retval Others                   The driver failded to start the device.
 169 **/
 170 EFI_STATUS
 171 EFIAPI
 172 IScsiDriverBindingStart (
 173   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
 174   IN EFI_HANDLE                   ControllerHandle,
 175   IN EFI_DEVICE_PATH_PROTOCOL     *RemainingDevicePath OPTIONAL
 176   )
 177 {
 178   EFI_STATUS        Status;
 179   ISCSI_DRIVER_DATA *Private;
 180   VOID              *Interface;
 181
 182   Private = IScsiCreateDriverData (This->DriverBindingHandle, ControllerHandle);
 183   if (Private == NULL) {
 184     return EFI_OUT_OF_RESOURCES;
 185   }
 186
 187   //
 188   // Create a underlayer child instance, but not need to configure it. Just open ChildHandle
 189   // via BY_DRIVER. That is, establishing the relationship between ControllerHandle and ChildHandle.
 190   // Therefore, when DisconnectController(), especially VLAN virtual controller handle,
 191   // IScsiDriverBindingStop() will be called.
 192   //
 193   Status = NetLibCreateServiceChild (
 194              ControllerHandle,
 195              This->DriverBindingHandle,
 196              &gEfiTcp4ServiceBindingProtocolGuid,
 197              &Private->ChildHandle
 198              );
 199
 200   if (EFI_ERROR (Status)) {
 201     goto ON_ERROR;
 202   }
 203
 204   Status = gBS->OpenProtocol (
 205                   Private->ChildHandle,
 206                   &gEfiTcp4ProtocolGuid,
 207                   &Interface,
 208                   This->DriverBindingHandle,
 209                   ControllerHandle,
 210                   EFI_OPEN_PROTOCOL_BY_DRIVER
 211                   );
 212   if (EFI_ERROR (Status)) {
 213     goto ON_ERROR;
 214   }
 215
 216   //
 217   // Always install private protocol no matter what happens later. We need to
 218   // keep the relationship between ControllerHandle and ChildHandle.
 219   //
 220   Status = gBS->InstallProtocolInterface (
 221                   &ControllerHandle,
 222                   &gEfiCallerIdGuid,
 223                   EFI_NATIVE_INTERFACE,
 224                   &Private->IScsiIdentifier
 225                   );
 226   if (EFI_ERROR (Status)) {
 227     goto ON_ERROR;
 228   }
 229
 230   //
 231   // Try to add a port configuration page for this controller.
 232   //
 233   IScsiConfigUpdateForm (This->DriverBindingHandle, ControllerHandle, TRUE);
 234
 235   //
 236   // Get the iSCSI configuration data of this controller.
 237   //
 238   Status = IScsiGetConfigData (Private);
 239   if (EFI_ERROR (Status)) {
 240     goto ON_ERROR;
 241   }
 242   //
 243   // Try to login and create an iSCSI session according to the configuration.
 244   //
 245   Status = IScsiSessionLogin (Private);
 246   if (Status == EFI_MEDIA_CHANGED) {
 247     //
 248     // The specified target is not available and the redirection information is
 249     // got, login the session again with the updated target address.
 250     //
 251     Status = IScsiSessionLogin (Private);
 252   }
 253
 254   if (EFI_ERROR (Status)) {
 255     goto ON_ERROR;
 256   }
 257   //
 258   // Duplicate the Session's tcp connection device path. The source port field
 259   // will be set to zero as one iSCSI session is comprised of several iSCSI
 260   // connections.
 261   //
 262   Private->DevicePath = IScsiGetTcpConnDevicePath (Private);
 263   if (Private->DevicePath == NULL) {
 264     goto ON_ERROR;
 265   }
 266   //
 267   // Install the updated device path onto the ExtScsiPassThruHandle.
 268   //
 269   Status = gBS->InstallProtocolInterface (
 270                   &Private->ExtScsiPassThruHandle,
 271                   &gEfiDevicePathProtocolGuid,
 272                   EFI_NATIVE_INTERFACE,
 273                   Private->DevicePath
 274                   );
 275   if (EFI_ERROR (Status)) {
 276     goto ON_ERROR;
 277   }
 278
 279   //
 280   // ISCSI children should share the default Tcp child, just open the default Tcp child via BY_CHILD_CONTROLLER.
 281   //
 282   Status = gBS->OpenProtocol (
 283                   Private->ChildHandle, /// Default Tcp child
 284                   &gEfiTcp4ProtocolGuid,
 285                   &Interface,
 286                   This->DriverBindingHandle,
 287                   Private->ExtScsiPassThruHandle,
 288                   EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
 289                   );
 290   if (EFI_ERROR (Status)) {
 291     gBS->UninstallMultipleProtocolInterfaces (
 292            Private->ExtScsiPassThruHandle,
 293            &gEfiExtScsiPassThruProtocolGuid,
 294            &Private->IScsiExtScsiPassThru,
 295            &gEfiDevicePathProtocolGuid,
 296            Private->DevicePath,
 297            NULL
 298            );
 299
 300     goto ON_ERROR;
 301   }
 302
 303   //
 304   // Update/Publish the iSCSI Boot Firmware Table.
 305   //
 306   IScsiPublishIbft ();
 307
 308   return EFI_SUCCESS;
 309
 310 ON_ERROR:
 311
 312   IScsiSessionAbort (&Private->Session);
 313
 314   return Status;
 315 }
 316
 317 /**
 318   Stop this driver on ControllerHandle.
 319
 320   Release the control of this controller and remove the IScsi functions. The Stop()
 321   function is designed to be invoked from the EFI boot service DisconnectController().
 322   As a result, much of the error checking on the parameters to Stop() has been moved
 323   into this common boot service. It is legal to call Stop() from other locations,
 324   but the following calling restrictions must be followed or the system behavior will not be deterministic.
 325   1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this
 326      same driver's Start() function.
 327   2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid
 328      EFI_HANDLE. In addition, all of these handles must have been created in this driver's
 329      Start() function, and the Start() function must have called OpenProtocol() on
 330      ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
 331
 332   @param[in]  This              A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.
 333   @param[in]  ControllerHandle  A handle to the device being stopped. The handle must
 334                                 support a bus specific I/O protocol for the driver
 335                                 to use to stop the device.
 336   @param[in]  NumberOfChildren  The number of child device handles in ChildHandleBuffer.Not used.
 337   @param[in]  ChildHandleBuffer An array of child handles to be freed. May be NULL
 338                                 if NumberOfChildren is 0.Not used.
 339
 340   @retval EFI_SUCCESS           The device was stopped.
 341   @retval EFI_DEVICE_ERROR      The device could not be stopped due to a device error.
 342   @retval EFI_INVALID_PARAMETER Child handle is NULL.
 343   @retval EFI_ACCESS_DENIED     The protocol could not be removed from the Handle
 344                                 because its interfaces are being used.
 345
 346 **/
 347 EFI_STATUS
 348 EFIAPI
 349 IScsiDriverBindingStop (
 350   IN EFI_DRIVER_BINDING_PROTOCOL  *This,
 351   IN EFI_HANDLE                   ControllerHandle,
 352   IN UINTN                        NumberOfChildren,
 353   IN EFI_HANDLE                   *ChildHandleBuffer OPTIONAL
 354   )
 355 {
 356   EFI_HANDLE                      IScsiController;
 357   EFI_STATUS                      Status;
 358   ISCSI_PRIVATE_PROTOCOL          *IScsiIdentifier;
 359   ISCSI_DRIVER_DATA               *Private;
 360   EFI_EXT_SCSI_PASS_THRU_PROTOCOL *PassThru;
 361   ISCSI_CONNECTION                *Conn;
 362
 363   if (NumberOfChildren != 0) {
 364     //
 365     // We should have only one child.
 366     //
 367     Status = gBS->OpenProtocol (
 368                     ChildHandleBuffer[0],
 369                     &gEfiExtScsiPassThruProtocolGuid,
 370                     (VOID **) &PassThru,
 371                     This->DriverBindingHandle,
 372                     ControllerHandle,
 373                     EFI_OPEN_PROTOCOL_GET_PROTOCOL
 374                     );
 375     if (EFI_ERROR (Status)) {
 376       return EFI_DEVICE_ERROR;
 377     }
 378
 379     Private = ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (PassThru);
 380     Conn    = NET_LIST_HEAD (&Private->Session.Conns, ISCSI_CONNECTION, Link);
 381
 382     //
 383     // Previously the TCP4 protocol is opened BY_CHILD_CONTROLLER. Just close
 384     // the protocol here but not uninstall the device path protocol and
 385     // EXT SCSI PASS THRU protocol installed on ExtScsiPassThruHandle.
 386     //
 387     gBS->CloseProtocol (
 388            Private->ChildHandle,
 389            &gEfiTcp4ProtocolGuid,
 390            Private->Image,
 391            Private->ExtScsiPassThruHandle
 392            );
 393
 394     gBS->CloseProtocol (
 395           Conn->Tcp4Io.Handle,
 396           &gEfiTcp4ProtocolGuid,
 397           Private->Image,
 398           Private->ExtScsiPassThruHandle
 399           );
 400
 401     return EFI_SUCCESS;
 402   }
 403   //
 404   // Get the handle of the controller we are controling.
 405   //
 406   IScsiController = NetLibGetNicHandle (ControllerHandle, &gEfiTcp4ProtocolGuid);
 407
 408   Status = gBS->OpenProtocol (
 409                   IScsiController,
 410                   &gEfiCallerIdGuid,
 411                   (VOID **)&IScsiIdentifier,
 412                   This->DriverBindingHandle,
 413                   ControllerHandle,
 414                   EFI_OPEN_PROTOCOL_GET_PROTOCOL
 415                   );
 416   if (EFI_ERROR (Status)) {
 417     return EFI_DEVICE_ERROR;
 418   }
 419
 420   Private = ISCSI_DRIVER_DATA_FROM_IDENTIFIER (IScsiIdentifier);
 421
 422   if (Private->ChildHandle != NULL) {
 423     Status = gBS->CloseProtocol (
 424                     Private->ChildHandle,
 425                     &gEfiTcp4ProtocolGuid,
 426                     This->DriverBindingHandle,
 427                     IScsiController
 428                     );
 429
 430     ASSERT (!EFI_ERROR (Status));
 431
 432     Status = NetLibDestroyServiceChild (
 433                IScsiController,
 434                This->DriverBindingHandle,
 435                &gEfiTcp4ServiceBindingProtocolGuid,
 436                Private->ChildHandle
 437                );
 438     ASSERT (!EFI_ERROR (Status));
 439   }
 440
 441   IScsiConfigUpdateForm (This->DriverBindingHandle, IScsiController, FALSE);
 442
 443   //
 444   // Uninstall the private protocol.
 445   //
 446   gBS->UninstallProtocolInterface (
 447         IScsiController,
 448         &gEfiCallerIdGuid,
 449         &Private->IScsiIdentifier
 450         );
 451
 452   //
 453   // Update the iSCSI Boot Firware Table.
 454   //
 455   IScsiPublishIbft ();
 456
 457   IScsiSessionAbort (&Private->Session);
 458   Status = IScsiCleanDriverData (Private);
 459   if (EFI_ERROR (Status)) {
 460     return Status;
 461   }
 462
 463   return EFI_SUCCESS;
 464 }
 465
 466 /**
 467   Unloads an image(the iSCSI driver).
 468
 469   @param[in]  ImageHandle       Handle that identifies the image to be unloaded.
 470
 471   @retval EFI_SUCCESS           The image has been unloaded.
 472   @retval Others                Other errors as indicated.
 473 **/
 474 EFI_STATUS
 475 EFIAPI
 476 EfiIScsiUnload (
 477   IN EFI_HANDLE  ImageHandle
 478   )
 479 {
 480   EFI_STATUS                        Status;
 481   UINTN                             DeviceHandleCount;
 482   EFI_HANDLE                        *DeviceHandleBuffer;
 483   UINTN                             Index;
 484   EFI_COMPONENT_NAME_PROTOCOL       *ComponentName;
 485   EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
 486
 487   //
 488   // Try to disonnect the driver from the devices it's controlling.
 489   //
 490   Status = gBS->LocateHandleBuffer (
 491                   AllHandles,
 492                   NULL,
 493                   NULL,
 494                   &DeviceHandleCount,
 495                   &DeviceHandleBuffer
 496                   );
 497   if (EFI_ERROR (Status)) {
 498     return Status;
 499   }
 500
 501   for (Index = 0; Index < DeviceHandleCount; Index++) {
 502     Status = IScsiTestManagedDevice (
 503                DeviceHandleBuffer[Index],
 504                gIScsiDriverBinding.DriverBindingHandle,
 505                &gEfiTcp4ProtocolGuid
 506                );
 507     if (EFI_ERROR (Status)) {
 508       continue;
 509     }
 510     Status = gBS->DisconnectController (
 511                     DeviceHandleBuffer[Index],
 512                     gIScsiDriverBinding.DriverBindingHandle,
 513                     NULL
 514                     );
 515     if (EFI_ERROR (Status)) {
 516       goto ON_EXIT;
 517     }
 518   }
 519
 520   //
 521   // Unload the iSCSI configuration form.
 522   //
 523   Status = IScsiConfigFormUnload (gIScsiDriverBinding.DriverBindingHandle);
 524   if (EFI_ERROR (Status)) {
 525     goto ON_EXIT;
 526   }
 527
 528   //
 529   // Uninstall the ComponentName and ComponentName2 protocol from iSCSI4 driver binding handle
 530   // if it has been installed.
 531   //
 532   Status = gBS->HandleProtocol (
 533                   gIScsiDriverBinding.DriverBindingHandle,
 534                   &gEfiComponentNameProtocolGuid,
 535                   (VOID **) &ComponentName
 536                   );
 537   if (!EFI_ERROR (Status)) {
 538     Status = gBS->UninstallMultipleProtocolInterfaces (
 539            gIScsiDriverBinding.DriverBindingHandle,
 540            &gEfiComponentNameProtocolGuid,
 541            ComponentName,
 542            NULL
 543            );
 544     if (EFI_ERROR (Status)) {
 545       goto ON_EXIT;
 546     }
 547   }
 548
 549   Status = gBS->HandleProtocol (
 550                   gIScsiDriverBinding.DriverBindingHandle,
 551                   &gEfiComponentName2ProtocolGuid,
 552                   (VOID **) &ComponentName2
 553                   );
 554   if (!EFI_ERROR (Status)) {
 555     gBS->UninstallMultipleProtocolInterfaces (
 556            gIScsiDriverBinding.DriverBindingHandle,
 557            &gEfiComponentName2ProtocolGuid,
 558            ComponentName2,
 559            NULL
 560            );
 561     if (EFI_ERROR (Status)) {
 562       goto ON_EXIT;
 563     }
 564   }
 565
 566   Status = gBS->UninstallMultipleProtocolInterfaces (
 567                   ImageHandle,
 568                   &gEfiDriverBindingProtocolGuid,
 569                   &gIScsiDriverBinding,
 570                   &gEfiIScsiInitiatorNameProtocolGuid,
 571                   &gIScsiInitiatorName,
 572                   NULL
 573                   );
 574 ON_EXIT:
 575
 576   if (DeviceHandleBuffer != NULL) {
 577     FreePool (DeviceHandleBuffer);
 578   }
 579
 580   return Status;
 581 }
 582
 583 /**
 584   This is the declaration of an EFI image entry point. This entry point is
 585   the same for UEFI Applications, UEFI OS Loaders, and UEFI Drivers including
 586   both device drivers and bus drivers. It initialize the global variables and
 587   publish the driver binding protocol.
 588
 589   @param[in]   ImageHandle      The firmware allocated handle for the UEFI image.
 590   @param[in]   SystemTable      A pointer to the EFI System Table.
 591
 592   @retval EFI_SUCCESS           The operation completed successfully.
 593   @retval EFI_ACCESS_DENIED     EFI_ISCSI_INITIATOR_NAME_PROTOCOL was installed unexpectedly.
 594   @retval Others                Other errors as indicated.
 595 **/
 596 EFI_STATUS
 597 EFIAPI
 598 IScsiDriverEntryPoint (
 599   IN EFI_HANDLE         ImageHandle,
 600   IN EFI_SYSTEM_TABLE   *SystemTable
 601   )
 602 {
 603   EFI_STATUS                         Status;
 604   EFI_ISCSI_INITIATOR_NAME_PROTOCOL  *IScsiInitiatorName;
 605
 606   //
 607   // There should be only one EFI_ISCSI_INITIATOR_NAME_PROTOCOL.
 608   //
 609   Status = gBS->LocateProtocol (
 610                    &gEfiIScsiInitiatorNameProtocolGuid,
 611                    NULL,
 612                    (VOID**) &IScsiInitiatorName
 613                    );
 614
 615   if (!EFI_ERROR (Status)) {
 616     return EFI_ACCESS_DENIED;
 617   }
 618
 619   //
 620   // Initialize the EFI Driver Library
 621   //
 622   Status = EfiLibInstallDriverBindingComponentName2 (
 623              ImageHandle,
 624              SystemTable,
 625              &gIScsiDriverBinding,
 626              ImageHandle,
 627              &gIScsiComponentName,
 628              &gIScsiComponentName2
 629            );
 630
 631   if (!EFI_ERROR (Status)) {
 632     //
 633     // Install the iSCSI Initiator Name Protocol.
 634     //
 635     Status = gBS->InstallProtocolInterface (
 636                     &ImageHandle,
 637                     &gEfiIScsiInitiatorNameProtocolGuid,
 638                     EFI_NATIVE_INTERFACE,
 639                     &gIScsiInitiatorName
 640                     );
 641     if (EFI_ERROR (Status)) {
 642       gBS->UninstallMultipleProtocolInterfaces (
 643             ImageHandle,
 644             &gEfiDriverBindingProtocolGuid,
 645             &gIScsiDriverBinding,
 646             &gEfiComponentName2ProtocolGuid,
 647             &gIScsiComponentName2,
 648             &gEfiComponentNameProtocolGuid,
 649             &gIScsiComponentName,
 650             NULL
 651             );
 652       return Status;
 653     }
 654
 655     //
 656     // Initialize the configuration form of iSCSI.
 657     //
 658     Status = IScsiConfigFormInit ();
 659     if (EFI_ERROR (Status)) {
 660       gBS->UninstallMultipleProtocolInterfaces (
 661             ImageHandle,
 662             &gEfiDriverBindingProtocolGuid,
 663             &gIScsiDriverBinding,
 664             &gEfiComponentName2ProtocolGuid,
 665             &gIScsiComponentName2,
 666             &gEfiComponentNameProtocolGuid,
 667             &gIScsiComponentName,
 668             &gEfiIScsiInitiatorNameProtocolGuid,
 669             &gIScsiInitiatorName,
 670             NULL
 671             );
 672     }
 673   }
 674   return Status;
 675 }
 676