NetworkPkg/IScsiDxe/IScsiMisc.c

   1 /** @file
   2   Miscellaneous routines for iSCSI driver.
   3
   4 Copyright (c) 2004 - 2016, 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 GLOBAL_REMOVE_IF_UNREFERENCED CONST CHAR8  IScsiHexString[] = "0123456789ABCDEFabcdef";
  18
  19 /**
  20   Removes (trims) specified leading and trailing characters from a string.
  21
  22   @param[in, out] Str   Pointer to the null-terminated string to be trimmed.
  23                         On return, Str will hold the trimmed string.
  24
  25   @param[in]      CharC Character will be trimmed from str.
  26
  27 **/
  28 VOID
  29 IScsiStrTrim (
  30   IN OUT CHAR16   *Str,
  31   IN     CHAR16   CharC
  32   )
  33 {
  34   CHAR16  *Pointer1;
  35   CHAR16  *Pointer2;
  36
  37   if (*Str == 0) {
  38     return ;
  39   }
  40
  41   //
  42   // Trim off the leading and trailing characters c
  43   //
  44   for (Pointer1 = Str; (*Pointer1 != 0) && (*Pointer1 == CharC); Pointer1++) {
  45     ;
  46   }
  47
  48   Pointer2 = Str;
  49   if (Pointer2 == Pointer1) {
  50     while (*Pointer1 != 0) {
  51       Pointer2++;
  52       Pointer1++;
  53     }
  54   } else {
  55     while (*Pointer1 != 0) {
  56     *Pointer2 = *Pointer1;
  57     Pointer1++;
  58     Pointer2++;
  59     }
  60     *Pointer2 = 0;
  61   }
  62
  63
  64   for (Pointer1 = Str + StrLen(Str) - 1; Pointer1 >= Str && *Pointer1 == CharC; Pointer1--) {
  65     ;
  66   }
  67   if  (Pointer1 !=  Str + StrLen(Str) - 1) {
  68     *(Pointer1 + 1) = 0;
  69   }
  70 }
  71
  72 /**
  73   Calculate the prefix length of the IPv4 subnet mask.
  74
  75   @param[in]  SubnetMask The IPv4 subnet mask.
  76
  77   @return     The prefix length of the subnet mask.
  78   @retval 0   Other errors as indicated.
  79
  80 **/
  81 UINT8
  82 IScsiGetSubnetMaskPrefixLength (
  83   IN EFI_IPv4_ADDRESS  *SubnetMask
  84   )
  85 {
  86   UINT8   Len;
  87   UINT32  ReverseMask;
  88
  89   //
  90   // The SubnetMask is in network byte order.
  91   //
  92   ReverseMask = (SubnetMask->Addr[0] << 24) | (SubnetMask->Addr[1] << 16) | (SubnetMask->Addr[2] << 8) | (SubnetMask->Addr[3]);
  93
  94   //
  95   // Reverse it.
  96   //
  97   ReverseMask = ~ReverseMask;
  98
  99   if ((ReverseMask & (ReverseMask + 1)) != 0) {
 100     return 0;
 101   }
 102
 103   Len = 0;
 104
 105   while (ReverseMask != 0) {
 106     ReverseMask = ReverseMask >> 1;
 107     Len++;
 108   }
 109
 110   return (UINT8) (32 - Len);
 111 }
 112
 113
 114 /**
 115   Convert the hexadecimal encoded LUN string into the 64-bit LUN.
 116
 117   @param[in]   Str             The hexadecimal encoded LUN string.
 118   @param[out]  Lun             Storage to return the 64-bit LUN.
 119
 120   @retval EFI_SUCCESS            The 64-bit LUN is stored in Lun.
 121   @retval EFI_INVALID_PARAMETER  The string is malformatted.
 122
 123 **/
 124 EFI_STATUS
 125 IScsiAsciiStrToLun (
 126   IN  CHAR8  *Str,
 127   OUT UINT8  *Lun
 128   )
 129 {
 130   UINTN   Index, IndexValue, IndexNum, SizeStr;
 131   CHAR8   TemStr[2];
 132   UINT8   TemValue;
 133   UINT16  Value[4];
 134
 135   ZeroMem (Lun, 8);
 136   ZeroMem (TemStr, 2);
 137   ZeroMem ((UINT8 *) Value, sizeof (Value));
 138   SizeStr    = AsciiStrLen (Str);
 139   IndexValue = 0;
 140   IndexNum   = 0;
 141
 142   for (Index = 0; Index < SizeStr; Index ++) {
 143     TemStr[0] = Str[Index];
 144     TemValue = (UINT8) AsciiStrHexToUint64 (TemStr);
 145     if (TemValue == 0 && TemStr[0] != '0') {
 146       if ((TemStr[0] != '-') || (IndexNum == 0)) {
 147         //
 148         // Invalid Lun Char.
 149         //
 150         return EFI_INVALID_PARAMETER;
 151       }
 152     }
 153
 154     if ((TemValue == 0) && (TemStr[0] == '-')) {
 155       //
 156       // Next Lun value.
 157       //
 158       if (++IndexValue >= 4) {
 159         //
 160         // Max 4 Lun value.
 161         //
 162         return EFI_INVALID_PARAMETER;
 163       }
 164       //
 165       // Restart str index for the next lun value.
 166       //
 167       IndexNum = 0;
 168       continue;
 169     }
 170
 171     if (++IndexNum > 4) {
 172       //
 173       // Each Lun Str can't exceed size 4, because it will be as UINT16 value.
 174       //
 175       return EFI_INVALID_PARAMETER;
 176     }
 177
 178     //
 179     // Combine UINT16 value.
 180     //
 181     Value[IndexValue] = (UINT16) ((Value[IndexValue] << 4) + TemValue);
 182   }
 183
 184   for (Index = 0; Index <= IndexValue; Index ++) {
 185     *((UINT16 *) &Lun[Index * 2]) =  HTONS (Value[Index]);
 186   }
 187
 188   return EFI_SUCCESS;
 189 }
 190
 191 /**
 192   Convert the 64-bit LUN into the hexadecimal encoded LUN string.
 193
 194   @param[in]   Lun The 64-bit LUN.
 195   @param[out]  Str The storage to return the hexadecimal encoded LUN string.
 196
 197 **/
 198 VOID
 199 IScsiLunToUnicodeStr (
 200   IN UINT8    *Lun,
 201   OUT CHAR16  *Str
 202   )
 203 {
 204   UINTN   Index;
 205   CHAR16  *TempStr;
 206
 207   TempStr = Str;
 208
 209   for (Index = 0; Index < 4; Index++) {
 210
 211     if ((Lun[2 * Index] | Lun[2 * Index + 1]) == 0) {
 212       CopyMem (TempStr, L"0-", sizeof (L"0-"));
 213     } else {
 214       TempStr[0]  = (CHAR16) IScsiHexString[Lun[2 * Index] >> 4];
 215       TempStr[1]  = (CHAR16) IScsiHexString[Lun[2 * Index] & 0x0F];
 216       TempStr[2]  = (CHAR16) IScsiHexString[Lun[2 * Index + 1] >> 4];
 217       TempStr[3]  = (CHAR16) IScsiHexString[Lun[2 * Index + 1] & 0x0F];
 218       TempStr[4]  = L'-';
 219       TempStr[5]  = 0;
 220
 221       IScsiStrTrim (TempStr, L'0');
 222     }
 223
 224     TempStr += StrLen (TempStr);
 225   }
 226   //
 227   // Remove the last '-'
 228   //
 229   ASSERT (StrLen(Str) >= 1);
 230   Str[StrLen (Str) - 1] = 0;
 231
 232   for (Index = StrLen (Str) - 1; Index > 1; Index = Index - 2) {
 233     if ((Str[Index] == L'0') && (Str[Index - 1] == L'-')) {
 234       Str[Index - 1] = 0;
 235     } else {
 236       break;
 237     }
 238   }
 239 }
 240
 241 /**
 242   Convert the formatted IP address into the binary IP address.
 243
 244   @param[in]   Str               The UNICODE string.
 245   @param[in]   IpMode            Indicates whether the IP address is v4 or v6.
 246   @param[out]  Ip                The storage to return the ASCII string.
 247
 248   @retval EFI_SUCCESS            The binary IP address is returned in Ip.
 249   @retval EFI_INVALID_PARAMETER  The IP string is malformatted or IpMode is
 250                                  invalid.
 251
 252 **/
 253 EFI_STATUS
 254 IScsiAsciiStrToIp (
 255   IN  CHAR8             *Str,
 256   IN  UINT8             IpMode,
 257   OUT EFI_IP_ADDRESS    *Ip
 258   )
 259 {
 260   EFI_STATUS            Status;
 261
 262   if (IpMode == IP_MODE_IP4 || IpMode == IP_MODE_AUTOCONFIG_IP4) {
 263     return NetLibAsciiStrToIp4 (Str, &Ip->v4);
 264
 265   } else if (IpMode == IP_MODE_IP6 || IpMode == IP_MODE_AUTOCONFIG_IP6) {
 266     return NetLibAsciiStrToIp6 (Str, &Ip->v6);
 267
 268   } else if (IpMode == IP_MODE_AUTOCONFIG) {
 269     Status = NetLibAsciiStrToIp4 (Str, &Ip->v4);
 270     if (!EFI_ERROR (Status)) {
 271       return Status;
 272     }
 273     return NetLibAsciiStrToIp6 (Str, &Ip->v6);
 274
 275   }
 276
 277   return EFI_INVALID_PARAMETER;
 278 }
 279
 280 /**
 281   Convert the mac address into a hexadecimal encoded "-" seperated string.
 282
 283   @param[in]  Mac     The mac address.
 284   @param[in]  Len     Length in bytes of the mac address.
 285   @param[in]  VlanId  VLAN ID of the network device.
 286   @param[out] Str     The storage to return the mac string.
 287
 288 **/
 289 VOID
 290 IScsiMacAddrToStr (
 291   IN  EFI_MAC_ADDRESS  *Mac,
 292   IN  UINT32           Len,
 293   IN  UINT16           VlanId,
 294   OUT CHAR16           *Str
 295   )
 296 {
 297   UINT32  Index;
 298   CHAR16  *String;
 299
 300   for (Index = 0; Index < Len; Index++) {
 301     Str[3 * Index]      = (CHAR16) IScsiHexString[(Mac->Addr[Index] >> 4) & 0x0F];
 302     Str[3 * Index + 1]  = (CHAR16) IScsiHexString[Mac->Addr[Index] & 0x0F];
 303     Str[3 * Index + 2]  = L':';
 304   }
 305
 306   String = &Str[3 * Index - 1] ;
 307   if (VlanId != 0) {
 308     String += UnicodeSPrint (String, 6 * sizeof (CHAR16), L"\\%04x", (UINTN) VlanId);
 309   }
 310
 311   *String = L'\0';
 312 }
 313
 314 /**
 315   Convert the binary encoded buffer into a hexadecimal encoded string.
 316
 317   @param[in]       BinBuffer   The buffer containing the binary data.
 318   @param[in]       BinLength   Length of the binary buffer.
 319   @param[in, out]  HexStr      Pointer to the string.
 320   @param[in, out]  HexLength   The length of the string.
 321
 322   @retval EFI_SUCCESS          The binary data is converted to the hexadecimal string
 323                                and the length of the string is updated.
 324   @retval EFI_BUFFER_TOO_SMALL The string is too small.
 325   @retval EFI_INVALID_PARAMETER The IP string is malformatted.
 326
 327 **/
 328 EFI_STATUS
 329 IScsiBinToHex (
 330   IN     UINT8  *BinBuffer,
 331   IN     UINT32 BinLength,
 332   IN OUT CHAR8  *HexStr,
 333   IN OUT UINT32 *HexLength
 334   )
 335 {
 336   UINTN Index;
 337
 338   if ((HexStr == NULL) || (BinBuffer == NULL) || (BinLength == 0)) {
 339     return EFI_INVALID_PARAMETER;
 340   }
 341
 342   if (((*HexLength) - 3) < BinLength * 2) {
 343     *HexLength = BinLength * 2 + 3;
 344     return EFI_BUFFER_TOO_SMALL;
 345   }
 346
 347   *HexLength = BinLength * 2 + 3;
 348   //
 349   // Prefix for Hex String.
 350   //
 351   HexStr[0] = '0';
 352   HexStr[1] = 'x';
 353
 354   for (Index = 0; Index < BinLength; Index++) {
 355     HexStr[Index * 2 + 2] = IScsiHexString[BinBuffer[Index] >> 4];
 356     HexStr[Index * 2 + 3] = IScsiHexString[BinBuffer[Index] & 0xf];
 357   }
 358
 359   HexStr[Index * 2 + 2] = '\0';
 360
 361   return EFI_SUCCESS;
 362 }
 363
 364
 365 /**
 366   Convert the hexadecimal string into a binary encoded buffer.
 367
 368   @param[in, out]  BinBuffer   The binary buffer.
 369   @param[in, out]  BinLength   Length of the binary buffer.
 370   @param[in]       HexStr      The hexadecimal string.
 371
 372   @retval EFI_SUCCESS          The hexadecimal string is converted into a binary
 373                                encoded buffer.
 374   @retval EFI_BUFFER_TOO_SMALL The binary buffer is too small to hold the converted data.
 375
 376 **/
 377 EFI_STATUS
 378 IScsiHexToBin (
 379   IN OUT UINT8  *BinBuffer,
 380   IN OUT UINT32 *BinLength,
 381   IN     CHAR8  *HexStr
 382   )
 383 {
 384   UINTN   Index;
 385   UINTN   Length;
 386   UINT8   Digit;
 387   CHAR8   TemStr[2];
 388
 389   ZeroMem (TemStr, sizeof (TemStr));
 390
 391   //
 392   // Find out how many hex characters the string has.
 393   //
 394   if ((HexStr[0] == '0') && ((HexStr[1] == 'x') || (HexStr[1] == 'X'))) {
 395     HexStr += 2;
 396   }
 397
 398   Length = AsciiStrLen (HexStr);
 399
 400   for (Index = 0; Index < Length; Index ++) {
 401     TemStr[0] = HexStr[Index];
 402     Digit = (UINT8) AsciiStrHexToUint64 (TemStr);
 403     if (Digit == 0 && TemStr[0] != '0') {
 404       //
 405       // Invalid Lun Char.
 406       //
 407       break;
 408     }
 409     if ((Index & 1) == 0) {
 410       BinBuffer [Index/2] = Digit;
 411     } else {
 412       BinBuffer [Index/2] = (UINT8) ((BinBuffer [Index/2] << 4) + Digit);
 413     }
 414   }
 415
 416   *BinLength = (UINT32) ((Index + 1)/2);
 417
 418   return EFI_SUCCESS;
 419 }
 420
 421
 422 /**
 423   Convert the decimal-constant string or hex-constant string into a numerical value.
 424
 425   @param[in] Str                    String in decimal or hex.
 426
 427   @return The numerical value.
 428
 429 **/
 430 UINTN
 431 IScsiNetNtoi (
 432   IN     CHAR8  *Str
 433   )
 434 {
 435   if ((Str[0] == '0') && ((Str[1] == 'x') || (Str[1] == 'X'))) {
 436     Str += 2;
 437
 438     return AsciiStrHexToUintn (Str);
 439   }
 440
 441   return AsciiStrDecimalToUintn (Str);
 442 }
 443
 444
 445 /**
 446   Generate random numbers.
 447
 448   @param[in, out]  Rand       The buffer to contain random numbers.
 449   @param[in]       RandLength The length of the Rand buffer.
 450
 451 **/
 452 VOID
 453 IScsiGenRandom (
 454   IN OUT UINT8  *Rand,
 455   IN     UINTN  RandLength
 456   )
 457 {
 458   UINT32  Random;
 459
 460   while (RandLength > 0) {
 461     Random  = NET_RANDOM (NetRandomInitSeed ());
 462     *Rand++ = (UINT8) (Random);
 463     RandLength--;
 464   }
 465 }
 466
 467
 468 /**
 469   Record the NIC info in global structure.
 470
 471   @param[in]  Controller         The handle of the controller.
 472
 473   @retval EFI_SUCCESS            The operation is completed.
 474   @retval EFI_OUT_OF_RESOURCES   Do not have sufficient resources to finish this
 475                                  operation.
 476
 477 **/
 478 EFI_STATUS
 479 IScsiAddNic (
 480   IN EFI_HANDLE  Controller
 481   )
 482 {
 483   EFI_STATUS                  Status;
 484   ISCSI_NIC_INFO              *NicInfo;
 485   LIST_ENTRY                  *Entry;
 486   EFI_MAC_ADDRESS             MacAddr;
 487   UINTN                       HwAddressSize;
 488   UINT16                      VlanId;
 489
 490   //
 491   // Get MAC address of this network device.
 492   //
 493   Status = NetLibGetMacAddress (Controller, &MacAddr, &HwAddressSize);
 494   if (EFI_ERROR (Status)) {
 495     return Status;
 496   }
 497
 498   //
 499   // Get VLAN ID of this network device.
 500   //
 501   VlanId = NetLibGetVlanId (Controller);
 502
 503   //
 504   // Check whether the NIC info already exists. Return directly if so.
 505   //
 506   NET_LIST_FOR_EACH (Entry, &mPrivate->NicInfoList) {
 507     NicInfo = NET_LIST_USER_STRUCT (Entry, ISCSI_NIC_INFO, Link);
 508     if (NicInfo->HwAddressSize == HwAddressSize &&
 509         CompareMem (&NicInfo->PermanentAddress, MacAddr.Addr, HwAddressSize) == 0 &&
 510         NicInfo->VlanId == VlanId) {
 511       mPrivate->CurrentNic = NicInfo->NicIndex;
 512       return EFI_SUCCESS;
 513     }
 514
 515     if (mPrivate->MaxNic < NicInfo->NicIndex) {
 516       mPrivate->MaxNic = NicInfo->NicIndex;
 517     }
 518   }
 519
 520   //
 521   // Record the NIC info in private structure.
 522   //
 523   NicInfo = AllocateZeroPool (sizeof (ISCSI_NIC_INFO));
 524   if (NicInfo == NULL) {
 525     return EFI_OUT_OF_RESOURCES;
 526   }
 527
 528   CopyMem (&NicInfo->PermanentAddress, MacAddr.Addr, HwAddressSize);
 529   NicInfo->HwAddressSize  = (UINT32) HwAddressSize;
 530   NicInfo->VlanId         = VlanId;
 531   NicInfo->NicIndex       = (UINT8) (mPrivate->MaxNic + 1);
 532   mPrivate->MaxNic        = NicInfo->NicIndex;
 533
 534   //
 535   // Get the PCI location.
 536   //
 537   IScsiGetNICPciLocation (
 538     Controller,
 539     &NicInfo->BusNumber,
 540     &NicInfo->DeviceNumber,
 541     &NicInfo->FunctionNumber
 542     );
 543
 544   InsertTailList (&mPrivate->NicInfoList, &NicInfo->Link);
 545   mPrivate->NicCount++;
 546
 547   mPrivate->CurrentNic = NicInfo->NicIndex;
 548   return EFI_SUCCESS;
 549 }
 550
 551
 552 /**
 553   Delete the recorded NIC info from global structure. Also delete corresponding
 554   attempts.
 555
 556   @param[in]  Controller         The handle of the controller.
 557
 558   @retval EFI_SUCCESS            The operation is completed.
 559   @retval EFI_NOT_FOUND          The NIC info to be deleted is not recorded.
 560
 561 **/
 562 EFI_STATUS
 563 IScsiRemoveNic (
 564   IN EFI_HANDLE  Controller
 565   )
 566 {
 567   EFI_STATUS                  Status;
 568   ISCSI_NIC_INFO              *NicInfo;
 569   LIST_ENTRY                  *Entry;
 570   LIST_ENTRY                  *NextEntry;
 571   ISCSI_ATTEMPT_CONFIG_NVDATA *AttemptConfigData;
 572   ISCSI_NIC_INFO              *ThisNic;
 573   EFI_MAC_ADDRESS             MacAddr;
 574   UINTN                       HwAddressSize;
 575   UINT16                      VlanId;
 576
 577   //
 578   // Get MAC address of this network device.
 579   //
 580   Status = NetLibGetMacAddress (Controller, &MacAddr, &HwAddressSize);
 581   if (EFI_ERROR (Status)) {
 582     return Status;
 583   }
 584
 585   //
 586   // Get VLAN ID of this network device.
 587   //
 588   VlanId = NetLibGetVlanId (Controller);
 589
 590   //
 591   // Check whether the NIC information exists.
 592   //
 593   ThisNic = NULL;
 594
 595   NET_LIST_FOR_EACH (Entry, &mPrivate->NicInfoList) {
 596     NicInfo = NET_LIST_USER_STRUCT (Entry, ISCSI_NIC_INFO, Link);
 597     if (NicInfo->HwAddressSize == HwAddressSize &&
 598         CompareMem (&NicInfo->PermanentAddress, MacAddr.Addr, HwAddressSize) == 0 &&
 599         NicInfo->VlanId == VlanId) {
 600
 601       ThisNic = NicInfo;
 602       break;
 603     }
 604   }
 605
 606   if (ThisNic == NULL) {
 607     return EFI_NOT_FOUND;
 608   }
 609
 610   mPrivate->CurrentNic = ThisNic->NicIndex;
 611
 612   RemoveEntryList (&ThisNic->Link);
 613   FreePool (ThisNic);
 614   mPrivate->NicCount--;
 615
 616   //
 617   // Remove all attempts related to this NIC.
 618   //
 619   NET_LIST_FOR_EACH_SAFE (Entry, NextEntry, &mPrivate->AttemptConfigs) {
 620     AttemptConfigData = NET_LIST_USER_STRUCT (Entry, ISCSI_ATTEMPT_CONFIG_NVDATA, Link);
 621     if (AttemptConfigData->NicIndex == mPrivate->CurrentNic) {
 622       RemoveEntryList (&AttemptConfigData->Link);
 623       mPrivate->AttemptCount--;
 624
 625       if (AttemptConfigData->SessionConfigData.Enabled == ISCSI_ENABLED_FOR_MPIO && mPrivate->MpioCount > 0) {
 626         if (--mPrivate->MpioCount == 0) {
 627           mPrivate->EnableMpio = FALSE;
 628         }
 629
 630         if (AttemptConfigData->AuthenticationType == ISCSI_AUTH_TYPE_KRB && mPrivate->Krb5MpioCount > 0) {
 631           mPrivate->Krb5MpioCount--;
 632         }
 633
 634       } else if (AttemptConfigData->SessionConfigData.Enabled == ISCSI_ENABLED && mPrivate->SinglePathCount > 0) {
 635         mPrivate->SinglePathCount--;
 636
 637         if (mPrivate->ValidSinglePathCount > 0) {
 638           mPrivate->ValidSinglePathCount--;
 639         }
 640       }
 641
 642       FreePool (AttemptConfigData);
 643     }
 644   }
 645
 646   //
 647   // Free attempt is created but not saved to system.
 648   //
 649   if (mPrivate->NewAttempt != NULL) {
 650     FreePool (mPrivate->NewAttempt);
 651     mPrivate->NewAttempt = NULL;
 652   }
 653
 654   return EFI_SUCCESS;
 655 }
 656
 657
 658 /**
 659   Get the recorded NIC info from global structure by the Index.
 660
 661   @param[in]  NicIndex          The index indicates the position of NIC info.
 662
 663   @return Pointer to the NIC info, or NULL if not found.
 664
 665 **/
 666 ISCSI_NIC_INFO *
 667 IScsiGetNicInfoByIndex (
 668   IN UINT8      NicIndex
 669   )
 670 {
 671   LIST_ENTRY        *Entry;
 672   ISCSI_NIC_INFO    *NicInfo;
 673
 674   NET_LIST_FOR_EACH (Entry, &mPrivate->NicInfoList) {
 675     NicInfo = NET_LIST_USER_STRUCT (Entry, ISCSI_NIC_INFO, Link);
 676     if (NicInfo->NicIndex == NicIndex) {
 677       return NicInfo;
 678     }
 679   }
 680
 681   return NULL;
 682 }
 683
 684
 685 /**
 686   Get the NIC's PCI location and return it according to the composited
 687   format defined in iSCSI Boot Firmware Table.
 688
 689   @param[in]   Controller        The handle of the controller.
 690   @param[out]  Bus               The bus number.
 691   @param[out]  Device            The device number.
 692   @param[out]  Function          The function number.
 693
 694   @return      The composited representation of the NIC PCI location.
 695
 696 **/
 697 UINT16
 698 IScsiGetNICPciLocation (
 699   IN EFI_HANDLE  Controller,
 700   OUT UINTN      *Bus,
 701   OUT UINTN      *Device,
 702   OUT UINTN      *Function
 703   )
 704 {
 705   EFI_STATUS                Status;
 706   EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
 707   EFI_HANDLE                PciIoHandle;
 708   EFI_PCI_IO_PROTOCOL       *PciIo;
 709   UINTN                     Segment;
 710
 711   Status = gBS->HandleProtocol (
 712                   Controller,
 713                   &gEfiDevicePathProtocolGuid,
 714                   (VOID **) &DevicePath
 715                   );
 716   if (EFI_ERROR (Status)) {
 717     return 0;
 718   }
 719
 720   Status = gBS->LocateDevicePath (
 721                   &gEfiPciIoProtocolGuid,
 722                   &DevicePath,
 723                   &PciIoHandle
 724                   );
 725   if (EFI_ERROR (Status)) {
 726     return 0;
 727   }
 728
 729   Status = gBS->HandleProtocol (PciIoHandle, &gEfiPciIoProtocolGuid, (VOID **) &PciIo);
 730   if (EFI_ERROR (Status)) {
 731     return 0;
 732   }
 733
 734   Status = PciIo->GetLocation (PciIo, &Segment, Bus, Device, Function);
 735   if (EFI_ERROR (Status)) {
 736     return 0;
 737   }
 738
 739   return (UINT16) ((*Bus << 8) | (*Device << 3) | *Function);
 740 }
 741
 742
 743 /**
 744   Read the EFI variable (VendorGuid/Name) and return a dynamically allocated
 745   buffer, and the size of the buffer. If failure, return NULL.
 746
 747   @param[in]   Name                   String part of EFI variable name.
 748   @param[in]   VendorGuid             GUID part of EFI variable name.
 749   @param[out]  VariableSize           Returns the size of the EFI variable that was read.
 750
 751   @return Dynamically allocated memory that contains a copy of the EFI variable.
 752   @return Caller is responsible freeing the buffer.
 753   @retval NULL                   Variable was not read.
 754
 755 **/
 756 VOID *
 757 IScsiGetVariableAndSize (
 758   IN  CHAR16              *Name,
 759   IN  EFI_GUID            *VendorGuid,
 760   OUT UINTN               *VariableSize
 761   )
 762 {
 763   EFI_STATUS  Status;
 764   UINTN       BufferSize;
 765   VOID        *Buffer;
 766
 767   Buffer = NULL;
 768
 769   //
 770   // Pass in a zero size buffer to find the required buffer size.
 771   //
 772   BufferSize  = 0;
 773   Status      = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);
 774   if (Status == EFI_BUFFER_TOO_SMALL) {
 775     //
 776     // Allocate the buffer to return
 777     //
 778     Buffer = AllocateZeroPool (BufferSize);
 779     if (Buffer == NULL) {
 780       return NULL;
 781     }
 782     //
 783     // Read variable into the allocated buffer.
 784     //
 785     Status = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);
 786     if (EFI_ERROR (Status)) {
 787       BufferSize = 0;
 788     }
 789   }
 790
 791   *VariableSize = BufferSize;
 792   return Buffer;
 793 }
 794
 795
 796 /**
 797   Create the iSCSI driver data.
 798
 799   @param[in] Image      The handle of the driver image.
 800   @param[in] Controller The handle of the controller.
 801
 802   @return The iSCSI driver data created.
 803   @retval NULL Other errors as indicated.
 804
 805 **/
 806 ISCSI_DRIVER_DATA *
 807 IScsiCreateDriverData (
 808   IN EFI_HANDLE  Image,
 809   IN EFI_HANDLE  Controller
 810   )
 811 {
 812   ISCSI_DRIVER_DATA *Private;
 813   EFI_STATUS        Status;
 814
 815   Private = AllocateZeroPool (sizeof (ISCSI_DRIVER_DATA));
 816   if (Private == NULL) {
 817     return NULL;
 818   }
 819
 820   Private->Signature  = ISCSI_DRIVER_DATA_SIGNATURE;
 821   Private->Image      = Image;
 822   Private->Controller = Controller;
 823   Private->Session    = NULL;
 824
 825   //
 826   // Create an event to be signaled when the BS to RT transition is triggerd so
 827   // as to abort the iSCSI session.
 828   //
 829   Status = gBS->CreateEventEx (
 830                   EVT_NOTIFY_SIGNAL,
 831                   TPL_CALLBACK,
 832                   IScsiOnExitBootService,
 833                   Private,
 834                   &gEfiEventExitBootServicesGuid,
 835                   &Private->ExitBootServiceEvent
 836                   );
 837   if (EFI_ERROR (Status)) {
 838     FreePool (Private);
 839     return NULL;
 840   }
 841
 842   Private->ExtScsiPassThruHandle = NULL;
 843   CopyMem(&Private->IScsiExtScsiPassThru, &gIScsiExtScsiPassThruProtocolTemplate, sizeof(EFI_EXT_SCSI_PASS_THRU_PROTOCOL));
 844
 845   //
 846   // 0 is designated to the TargetId, so use another value for the AdapterId.
 847   //
 848   Private->ExtScsiPassThruMode.AdapterId  = 2;
 849   Private->ExtScsiPassThruMode.Attributes = EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_PHYSICAL | EFI_EXT_SCSI_PASS_THRU_ATTRIBUTES_LOGICAL;
 850   Private->ExtScsiPassThruMode.IoAlign    = 4;
 851   Private->IScsiExtScsiPassThru.Mode      = &Private->ExtScsiPassThruMode;
 852
 853   return Private;
 854 }
 855
 856
 857 /**
 858   Clean the iSCSI driver data.
 859
 860   @param[in]              Private The iSCSI driver data.
 861
 862   @retval EFI_SUCCESS     The clean operation is successful.
 863   @retval Others          Other errors as indicated.
 864
 865 **/
 866 EFI_STATUS
 867 IScsiCleanDriverData (
 868   IN ISCSI_DRIVER_DATA  *Private
 869   )
 870 {
 871   EFI_STATUS            Status;
 872
 873   Status = EFI_SUCCESS;
 874
 875   if (Private->DevicePath != NULL) {
 876     Status = gBS->UninstallProtocolInterface (
 877                     Private->ExtScsiPassThruHandle,
 878                     &gEfiDevicePathProtocolGuid,
 879                     Private->DevicePath
 880                     );
 881     if (EFI_ERROR (Status)) {
 882       goto EXIT;
 883     }
 884
 885     FreePool (Private->DevicePath);
 886   }
 887
 888   if (Private->ExtScsiPassThruHandle != NULL) {
 889     Status = gBS->UninstallProtocolInterface (
 890                     Private->ExtScsiPassThruHandle,
 891                     &gEfiExtScsiPassThruProtocolGuid,
 892                     &Private->IScsiExtScsiPassThru
 893                     );
 894     if (!EFI_ERROR (Status)) {
 895       mPrivate->OneSessionEstablished = FALSE;
 896     }
 897   }
 898
 899 EXIT:
 900
 901   gBS->CloseEvent (Private->ExitBootServiceEvent);
 902
 903   FreePool (Private);
 904   return Status;
 905 }
 906
 907 /**
 908   Check wheather the Controller handle is configured to use DHCP protocol.
 909
 910   @param[in]  Controller           The handle of the controller.
 911   @param[in]  IpVersion            IP_VERSION_4 or IP_VERSION_6.
 912
 913   @retval TRUE                     The handle of the controller need the Dhcp protocol.
 914   @retval FALSE                    The handle of the controller does not need the Dhcp protocol.
 915
 916 **/
 917 BOOLEAN
 918 IScsiDhcpIsConfigured (
 919   IN EFI_HANDLE  Controller,
 920   IN UINT8       IpVersion
 921   )
 922 {
 923   ISCSI_ATTEMPT_CONFIG_NVDATA *AttemptTmp;
 924   UINT8                       *AttemptConfigOrder;
 925   UINTN                       AttemptConfigOrderSize;
 926   UINTN                       Index;
 927   EFI_STATUS                  Status;
 928   EFI_MAC_ADDRESS             MacAddr;
 929   UINTN                       HwAddressSize;
 930   UINT16                      VlanId;
 931   CHAR16                      MacString[ISCSI_MAX_MAC_STRING_LEN];
 932   CHAR16                      AttemptName[ISCSI_NAME_IFR_MAX_SIZE];
 933
 934   AttemptConfigOrder = IScsiGetVariableAndSize (
 935                          L"AttemptOrder",
 936                          &gIScsiConfigGuid,
 937                          &AttemptConfigOrderSize
 938                          );
 939   if (AttemptConfigOrder == NULL || AttemptConfigOrderSize == 0) {
 940     return FALSE;
 941   }
 942
 943   //
 944   // Get MAC address of this network device.
 945   //
 946   Status = NetLibGetMacAddress (Controller, &MacAddr, &HwAddressSize);
 947   if(EFI_ERROR (Status)) {
 948     return FALSE;
 949   }
 950   //
 951   // Get VLAN ID of this network device.
 952   //
 953   VlanId = NetLibGetVlanId (Controller);
 954   IScsiMacAddrToStr (&MacAddr, (UINT32) HwAddressSize, VlanId, MacString);
 955
 956   for (Index = 0; Index < AttemptConfigOrderSize / sizeof (UINT8); Index++) {
 957     UnicodeSPrint (
 958       AttemptName,
 959       (UINTN) 128,
 960       L"%s%d",
 961       MacString,
 962       (UINTN) AttemptConfigOrder[Index]
 963       );
 964     Status = GetVariable2 (
 965                AttemptName,
 966                &gEfiIScsiInitiatorNameProtocolGuid,
 967                (VOID**)&AttemptTmp,
 968                NULL
 969                );
 970     if(AttemptTmp == NULL || EFI_ERROR (Status)) {
 971       continue;
 972     }
 973
 974     ASSERT (AttemptConfigOrder[Index] == AttemptTmp->AttemptConfigIndex);
 975
 976     if (AttemptTmp->SessionConfigData.Enabled == ISCSI_DISABLED) {
 977       FreePool (AttemptTmp);
 978       continue;
 979     }
 980
 981     if (AttemptTmp->SessionConfigData.IpMode != IP_MODE_AUTOCONFIG &&
 982         AttemptTmp->SessionConfigData.IpMode != ((IpVersion == IP_VERSION_4) ? IP_MODE_IP4 : IP_MODE_IP6)) {
 983       FreePool (AttemptTmp);
 984       continue;
 985     }
 986
 987     if(AttemptTmp->SessionConfigData.IpMode == IP_MODE_AUTOCONFIG ||
 988        AttemptTmp->SessionConfigData.InitiatorInfoFromDhcp == TRUE ||
 989        AttemptTmp->SessionConfigData.TargetInfoFromDhcp == TRUE) {
 990       FreePool (AttemptTmp);
 991       FreePool (AttemptConfigOrder);
 992       return TRUE;
 993     }
 994
 995     FreePool (AttemptTmp);
 996   }
 997
 998   FreePool (AttemptConfigOrder);
 999   return FALSE;
1000 }
1001
1002 /**
1003   Get the various configuration data.
1004
1005   @param[in]  Private   The iSCSI driver data.
1006
1007   @retval EFI_SUCCESS            The configuration data is retrieved.
1008   @retval EFI_NOT_FOUND          This iSCSI driver is not configured yet.
1009   @retval EFI_OUT_OF_RESOURCES   Failed to allocate memory.
1010
1011 **/
1012 EFI_STATUS
1013 IScsiGetConfigData (
1014   IN ISCSI_DRIVER_DATA  *Private
1015   )
1016 {
1017   EFI_STATUS                  Status;
1018   CHAR16                      MacString[ISCSI_MAX_MAC_STRING_LEN];
1019   UINTN                       Index;
1020   ISCSI_NIC_INFO              *NicInfo;
1021   ISCSI_ATTEMPT_CONFIG_NVDATA *AttemptConfigData;
1022   ISCSI_ATTEMPT_CONFIG_NVDATA *AttemptTmp;
1023   UINT8                       *AttemptConfigOrder;
1024   UINTN                       AttemptConfigOrderSize;
1025   CHAR16                      IScsiMode[64];
1026   CHAR16                      IpMode[64];
1027
1028   //
1029   // There should be at least one attempt configured.
1030   //
1031   AttemptConfigOrder = IScsiGetVariableAndSize (
1032                          L"AttemptOrder",
1033                          &gIScsiConfigGuid,
1034                          &AttemptConfigOrderSize
1035                          );
1036   if (AttemptConfigOrder == NULL || AttemptConfigOrderSize == 0) {
1037     return EFI_NOT_FOUND;
1038   }
1039
1040   //
1041   // Get the iSCSI Initiator Name.
1042   //
1043   mPrivate->InitiatorNameLength  = ISCSI_NAME_MAX_SIZE;
1044   Status = gIScsiInitiatorName.Get (
1045                                  &gIScsiInitiatorName,
1046                                  &mPrivate->InitiatorNameLength,
1047                                  mPrivate->InitiatorName
1048                                  );
1049   if (EFI_ERROR (Status)) {
1050     return Status;
1051   }
1052
1053   //
1054   // Get the normal configuration.
1055   //
1056   for (Index = 0; Index < AttemptConfigOrderSize / sizeof (UINT8); Index++) {
1057
1058     //
1059     // Check whether the attempt exists in AttemptConfig.
1060     //
1061     AttemptTmp = IScsiConfigGetAttemptByConfigIndex (AttemptConfigOrder[Index]);
1062     if (AttemptTmp != NULL && AttemptTmp->SessionConfigData.Enabled == ISCSI_DISABLED) {
1063       continue;
1064     } else if (AttemptTmp != NULL && AttemptTmp->SessionConfigData.Enabled != ISCSI_DISABLED) {
1065       //
1066       // Check the autoconfig path to see whether it should be retried.
1067       //
1068       if (AttemptTmp->SessionConfigData.IpMode == IP_MODE_AUTOCONFIG &&
1069           !AttemptTmp->AutoConfigureSuccess) {
1070         if (mPrivate->Ipv6Flag &&
1071             AttemptTmp->AutoConfigureMode == IP_MODE_AUTOCONFIG_IP6) {
1072           //
1073           // Autoconfigure for IP6 already attempted but failed. Do not try again.
1074           //
1075           continue;
1076         } else if (!mPrivate->Ipv6Flag &&
1077                    AttemptTmp->AutoConfigureMode == IP_MODE_AUTOCONFIG_IP4) {
1078           //
1079           // Autoconfigure for IP4  already attempted but failed. Do not try again.
1080           //
1081           continue;
1082         } else {
1083           //
1084           // Try another approach for this autoconfigure path.
1085           //
1086           AttemptTmp->AutoConfigureMode =
1087             (UINT8) (mPrivate->Ipv6Flag ? IP_MODE_AUTOCONFIG_IP6 : IP_MODE_AUTOCONFIG_IP4);
1088           AttemptTmp->SessionConfigData.InitiatorInfoFromDhcp = TRUE;
1089           AttemptTmp->SessionConfigData.TargetInfoFromDhcp    = TRUE;
1090           AttemptTmp->DhcpSuccess                             = FALSE;
1091
1092           //
1093           // Get some information from the dhcp server.
1094           //
1095           if (!mPrivate->Ipv6Flag) {
1096             Status = IScsiDoDhcp (Private->Image, Private->Controller, AttemptTmp);
1097             if (!EFI_ERROR (Status)) {
1098               AttemptTmp->DhcpSuccess = TRUE;
1099             }
1100           } else {
1101             Status = IScsiDoDhcp6 (Private->Image, Private->Controller, AttemptTmp);
1102             if (!EFI_ERROR (Status)) {
1103               AttemptTmp->DhcpSuccess = TRUE;
1104             }
1105           }
1106
1107           //
1108           // Refresh the state of this attempt to NVR.
1109           //
1110           AsciiStrToUnicodeStrS (AttemptTmp->MacString, MacString, sizeof (MacString) / sizeof (MacString[0]));
1111           UnicodeSPrint (
1112             mPrivate->PortString,
1113             (UINTN) ISCSI_NAME_IFR_MAX_SIZE,
1114             L"%s%d",
1115             MacString,
1116             (UINTN) AttemptTmp->AttemptConfigIndex
1117             );
1118
1119           gRT->SetVariable (
1120                  mPrivate->PortString,
1121                  &gEfiIScsiInitiatorNameProtocolGuid,
1122                  ISCSI_CONFIG_VAR_ATTR,
1123                  sizeof (ISCSI_ATTEMPT_CONFIG_NVDATA),
1124                  AttemptTmp
1125                  );
1126
1127           continue;
1128         }
1129       } else if (AttemptTmp->SessionConfigData.InitiatorInfoFromDhcp && !AttemptTmp->ValidPath) {
1130         //
1131         // Get DHCP information for already added, but failed, attempt.
1132         //
1133         AttemptTmp->DhcpSuccess = FALSE;
1134         if (!mPrivate->Ipv6Flag && (AttemptTmp->SessionConfigData.IpMode == IP_MODE_IP4)) {
1135           Status = IScsiDoDhcp (Private->Image, Private->Controller, AttemptTmp);
1136           if (!EFI_ERROR (Status)) {
1137             AttemptTmp->DhcpSuccess = TRUE;
1138           }
1139         } else if (mPrivate->Ipv6Flag && (AttemptTmp->SessionConfigData.IpMode == IP_MODE_IP6)) {
1140           Status = IScsiDoDhcp6 (Private->Image, Private->Controller, AttemptTmp);
1141           if (!EFI_ERROR (Status)) {
1142             AttemptTmp->DhcpSuccess = TRUE;
1143           }
1144         }
1145
1146         //
1147         // Refresh the state of this attempt to NVR.
1148         //
1149         AsciiStrToUnicodeStrS (AttemptTmp->MacString, MacString, sizeof (MacString) / sizeof (MacString[0]));
1150         UnicodeSPrint (
1151           mPrivate->PortString,
1152           (UINTN) ISCSI_NAME_IFR_MAX_SIZE,
1153           L"%s%d",
1154           MacString,
1155           (UINTN) AttemptTmp->AttemptConfigIndex
1156           );
1157
1158         gRT->SetVariable (
1159                mPrivate->PortString,
1160                &gEfiIScsiInitiatorNameProtocolGuid,
1161                ISCSI_CONFIG_VAR_ATTR,
1162                sizeof (ISCSI_ATTEMPT_CONFIG_NVDATA),
1163                AttemptTmp
1164                );
1165
1166         continue;
1167
1168       } else {
1169         continue;
1170       }
1171     }
1172
1173     //
1174     // This attempt does not exist in AttemptConfig. Try to add a new one.
1175     //
1176
1177     NicInfo = IScsiGetNicInfoByIndex (mPrivate->CurrentNic);
1178     ASSERT (NicInfo != NULL);
1179     IScsiMacAddrToStr (&NicInfo->PermanentAddress, NicInfo->HwAddressSize, NicInfo->VlanId, MacString);
1180     UnicodeSPrint (
1181       mPrivate->PortString,
1182       (UINTN) 128,
1183       L"%s%d",
1184       MacString,
1185       (UINTN) AttemptConfigOrder[Index]
1186       );
1187
1188     GetVariable2 (
1189                  mPrivate->PortString,
1190                  &gEfiIScsiInitiatorNameProtocolGuid,
1191                  (VOID**)&AttemptConfigData,
1192                  NULL
1193                  );
1194
1195     if (AttemptConfigData == NULL) {
1196       continue;
1197     }
1198
1199     ASSERT (AttemptConfigOrder[Index] == AttemptConfigData->AttemptConfigIndex);
1200
1201     AttemptConfigData->NicIndex      = NicInfo->NicIndex;
1202     AttemptConfigData->DhcpSuccess   = FALSE;
1203     AttemptConfigData->ValidiBFTPath = (BOOLEAN) (mPrivate->EnableMpio ? TRUE : FALSE);
1204     AttemptConfigData->ValidPath     = FALSE;
1205
1206     if (AttemptConfigData->SessionConfigData.IpMode == IP_MODE_AUTOCONFIG) {
1207       AttemptConfigData->SessionConfigData.InitiatorInfoFromDhcp = TRUE;
1208       AttemptConfigData->SessionConfigData.TargetInfoFromDhcp    = TRUE;
1209
1210       AttemptConfigData->AutoConfigureMode =
1211         (UINT8) (mPrivate->Ipv6Flag ? IP_MODE_AUTOCONFIG_IP6 : IP_MODE_AUTOCONFIG_IP4);
1212       AttemptConfigData->AutoConfigureSuccess = FALSE;
1213     }
1214
1215     //
1216     // Get some information from dhcp server.
1217     //
1218     if (AttemptConfigData->SessionConfigData.Enabled != ISCSI_DISABLED &&
1219         AttemptConfigData->SessionConfigData.InitiatorInfoFromDhcp) {
1220
1221       if (!mPrivate->Ipv6Flag &&
1222           (AttemptConfigData->SessionConfigData.IpMode == IP_MODE_IP4 ||
1223            AttemptConfigData->AutoConfigureMode == IP_MODE_AUTOCONFIG_IP4)) {
1224         Status = IScsiDoDhcp (Private->Image, Private->Controller, AttemptConfigData);
1225         if (!EFI_ERROR (Status)) {
1226           AttemptConfigData->DhcpSuccess = TRUE;
1227         }
1228       } else if (mPrivate->Ipv6Flag &&
1229                 (AttemptConfigData->SessionConfigData.IpMode == IP_MODE_IP6 ||
1230                  AttemptConfigData->AutoConfigureMode == IP_MODE_AUTOCONFIG_IP6)) {
1231         Status = IScsiDoDhcp6 (Private->Image, Private->Controller, AttemptConfigData);
1232         if (!EFI_ERROR (Status)) {
1233           AttemptConfigData->DhcpSuccess = TRUE;
1234         }
1235       }
1236
1237       //
1238       // Refresh the state of this attempt to NVR.
1239       //
1240       AsciiStrToUnicodeStrS (AttemptConfigData->MacString, MacString, sizeof (MacString) / sizeof (MacString[0]));
1241       UnicodeSPrint (
1242         mPrivate->PortString,
1243         (UINTN) ISCSI_NAME_IFR_MAX_SIZE,
1244         L"%s%d",
1245         MacString,
1246         (UINTN) AttemptConfigData->AttemptConfigIndex
1247         );
1248
1249       gRT->SetVariable (
1250              mPrivate->PortString,
1251              &gEfiIScsiInitiatorNameProtocolGuid,
1252              ISCSI_CONFIG_VAR_ATTR,
1253              sizeof (ISCSI_ATTEMPT_CONFIG_NVDATA),
1254              AttemptConfigData
1255              );
1256     }
1257
1258     //
1259     // Update Attempt Help Info.
1260     //
1261
1262     if (AttemptConfigData->SessionConfigData.Enabled == ISCSI_DISABLED) {
1263       UnicodeSPrint (IScsiMode, 64, L"Disabled");
1264     } else if (AttemptConfigData->SessionConfigData.Enabled == ISCSI_ENABLED) {
1265       UnicodeSPrint (IScsiMode, 64, L"Enabled");
1266     } else if (AttemptConfigData->SessionConfigData.Enabled == ISCSI_ENABLED_FOR_MPIO) {
1267       UnicodeSPrint (IScsiMode, 64, L"Enabled for MPIO");
1268     }
1269
1270     if (AttemptConfigData->SessionConfigData.IpMode == IP_MODE_IP4) {
1271       UnicodeSPrint (IpMode, 64, L"IP4");
1272     } else if (AttemptConfigData->SessionConfigData.IpMode == IP_MODE_IP6) {
1273       UnicodeSPrint (IpMode, 64, L"IP6");
1274     } else if (AttemptConfigData->SessionConfigData.IpMode == IP_MODE_AUTOCONFIG) {
1275       UnicodeSPrint (IpMode, 64, L"Autoconfigure");
1276     }
1277
1278     UnicodeSPrint (
1279       mPrivate->PortString,
1280       (UINTN) ISCSI_NAME_IFR_MAX_SIZE,
1281       L"MAC: %s, PFA: Bus %d | Dev %d | Func %d, iSCSI mode: %s, IP version: %s",
1282       MacString,
1283       NicInfo->BusNumber,
1284       NicInfo->DeviceNumber,
1285       NicInfo->FunctionNumber,
1286       IScsiMode,
1287       IpMode
1288       );
1289
1290     AttemptConfigData->AttemptTitleHelpToken = HiiSetString (
1291                                                  mCallbackInfo->RegisteredHandle,
1292                                                  0,
1293                                                  mPrivate->PortString,
1294                                                  NULL
1295                                                  );
1296     if (AttemptConfigData->AttemptTitleHelpToken == 0) {
1297       return EFI_OUT_OF_RESOURCES;
1298     }
1299
1300     //
1301     // Record the attempt in global link list.
1302     //
1303     InsertTailList (&mPrivate->AttemptConfigs, &AttemptConfigData->Link);
1304     mPrivate->AttemptCount++;
1305
1306     if (AttemptConfigData->SessionConfigData.Enabled == ISCSI_ENABLED_FOR_MPIO) {
1307       mPrivate->MpioCount++;
1308       mPrivate->EnableMpio = TRUE;
1309
1310       if (AttemptConfigData->AuthenticationType == ISCSI_AUTH_TYPE_KRB) {
1311         mPrivate->Krb5MpioCount++;
1312       }
1313     } else if (AttemptConfigData->SessionConfigData.Enabled == ISCSI_ENABLED) {
1314       mPrivate->SinglePathCount++;
1315     }
1316   }
1317
1318   //
1319   // Reorder the AttemptConfig by the configured order.
1320   //
1321   for (Index = 0; Index < AttemptConfigOrderSize / sizeof (UINT8); Index++) {
1322     AttemptConfigData = IScsiConfigGetAttemptByConfigIndex (AttemptConfigOrder[Index]);
1323     if (AttemptConfigData == NULL) {
1324       continue;
1325     }
1326
1327     RemoveEntryList (&AttemptConfigData->Link);
1328     InsertTailList (&mPrivate->AttemptConfigs, &AttemptConfigData->Link);
1329   }
1330
1331   //
1332   // Update the Main Form.
1333   //
1334   IScsiConfigUpdateAttempt ();
1335
1336   FreePool (AttemptConfigOrder);
1337
1338   //
1339   //  There should be at least one attempt configuration.
1340   //
1341   if (!mPrivate->EnableMpio) {
1342     if (mPrivate->SinglePathCount == 0) {
1343       return EFI_NOT_FOUND;
1344     }
1345     mPrivate->ValidSinglePathCount = mPrivate->SinglePathCount;
1346   }
1347
1348   return EFI_SUCCESS;
1349 }
1350
1351
1352 /**
1353   Get the device path of the iSCSI tcp connection and update it.
1354
1355   @param  Session                The iSCSI session.
1356
1357   @return The updated device path.
1358   @retval NULL Other errors as indicated.
1359
1360 **/
1361 EFI_DEVICE_PATH_PROTOCOL *
1362 IScsiGetTcpConnDevicePath (
1363   IN ISCSI_SESSION      *Session
1364   )
1365 {
1366   ISCSI_CONNECTION          *Conn;
1367   EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
1368   EFI_STATUS                Status;
1369   EFI_DEV_PATH              *DPathNode;
1370   UINTN                     PathLen;
1371
1372   if (Session->State != SESSION_STATE_LOGGED_IN) {
1373     return NULL;
1374   }
1375
1376   Conn = NET_LIST_USER_STRUCT_S (
1377            Session->Conns.ForwardLink,
1378            ISCSI_CONNECTION,
1379            Link,
1380            ISCSI_CONNECTION_SIGNATURE
1381            );
1382
1383   Status = gBS->HandleProtocol (
1384                   Conn->TcpIo.Handle,
1385                   &gEfiDevicePathProtocolGuid,
1386                   (VOID **) &DevicePath
1387                   );
1388   if (EFI_ERROR (Status)) {
1389     return NULL;
1390   }
1391   //
1392   // Duplicate it.
1393   //
1394   DevicePath  = DuplicateDevicePath (DevicePath);
1395   if (DevicePath == NULL) {
1396     return NULL;
1397   }
1398
1399   DPathNode   = (EFI_DEV_PATH *) DevicePath;
1400
1401   while (!IsDevicePathEnd (&DPathNode->DevPath)) {
1402     if (DevicePathType (&DPathNode->DevPath) == MESSAGING_DEVICE_PATH) {
1403       if (!Conn->Ipv6Flag && DevicePathSubType (&DPathNode->DevPath) == MSG_IPv4_DP) {
1404         DPathNode->Ipv4.LocalPort       = 0;
1405
1406         DPathNode->Ipv4.StaticIpAddress =
1407           (BOOLEAN) (!Session->ConfigData->SessionConfigData.InitiatorInfoFromDhcp);
1408
1409         //
1410         //  Add a judgement here to support previous versions of IPv4_DEVICE_PATH.
1411         //  In previous versions of IPv4_DEVICE_PATH, GatewayIpAddress and SubnetMask
1412         //  do not exist.
1413         //  In new version of IPv4_DEVICE_PATH, structcure length is 27.
1414         //
1415
1416         PathLen = DevicePathNodeLength (&DPathNode->Ipv4);
1417
1418         if (PathLen == IP4_NODE_LEN_NEW_VERSIONS) {
1419
1420           IP4_COPY_ADDRESS (
1421             &DPathNode->Ipv4.GatewayIpAddress,
1422             &Session->ConfigData->SessionConfigData.Gateway
1423             );
1424
1425           IP4_COPY_ADDRESS (
1426             &DPathNode->Ipv4.SubnetMask,
1427             &Session->ConfigData->SessionConfigData.SubnetMask
1428             );
1429         }
1430
1431         break;
1432       } else if (Conn->Ipv6Flag && DevicePathSubType (&DPathNode->DevPath) == MSG_IPv6_DP) {
1433         DPathNode->Ipv6.LocalPort       = 0;
1434
1435         //
1436         //  Add a judgement here to support previous versions of IPv6_DEVICE_PATH.
1437         //  In previous versions of IPv6_DEVICE_PATH, IpAddressOrigin, PrefixLength
1438         //  and GatewayIpAddress do not exist.
1439         //  In new version of IPv6_DEVICE_PATH, structure length is 60, while in
1440         //  old versions, the length is 43.
1441         //
1442
1443         PathLen = DevicePathNodeLength (&DPathNode->Ipv6);
1444
1445         if (PathLen == IP6_NODE_LEN_NEW_VERSIONS ) {
1446
1447           DPathNode->Ipv6.IpAddressOrigin = 0;
1448           DPathNode->Ipv6.PrefixLength    = IP6_PREFIX_LENGTH;
1449           ZeroMem (&DPathNode->Ipv6.GatewayIpAddress, sizeof (EFI_IPv6_ADDRESS));
1450         }
1451         else if (PathLen == IP6_NODE_LEN_OLD_VERSIONS) {
1452
1453           //
1454           //  StaticIPAddress is a field in old versions of IPv6_DEVICE_PATH, while ignored in new
1455           //  version. Set StaticIPAddress through its' offset in old IPv6_DEVICE_PATH.
1456           //
1457           *((UINT8 *)(&DPathNode->Ipv6) + IP6_OLD_IPADDRESS_OFFSET) =
1458             (BOOLEAN) (!Session->ConfigData->SessionConfigData.InitiatorInfoFromDhcp);
1459         }
1460
1461         break;
1462       }
1463     }
1464
1465     DPathNode = (EFI_DEV_PATH *) NextDevicePathNode (&DPathNode->DevPath);
1466   }
1467
1468   return DevicePath;
1469 }
1470
1471
1472 /**
1473   Abort the session when the transition from BS to RT is initiated.
1474
1475   @param[in]   Event  The event signaled.
1476   @param[in]  Context The iSCSI driver data.
1477
1478 **/
1479 VOID
1480 EFIAPI
1481 IScsiOnExitBootService (
1482   IN EFI_EVENT  Event,
1483   IN VOID       *Context
1484   )
1485 {
1486   ISCSI_DRIVER_DATA *Private;
1487
1488   Private = (ISCSI_DRIVER_DATA *) Context;
1489   gBS->CloseEvent (Private->ExitBootServiceEvent);
1490
1491   if (Private->Session != NULL) {
1492     IScsiSessionAbort (Private->Session);
1493   }
1494 }
1495
1496 /**
1497   Tests whether a controller handle is being managed by IScsi driver.
1498
1499   This function tests whether the driver specified by DriverBindingHandle is
1500   currently managing the controller specified by ControllerHandle.  This test
1501   is performed by evaluating if the the protocol specified by ProtocolGuid is
1502   present on ControllerHandle and is was opened by DriverBindingHandle and Nic
1503   Device handle with an attribute of EFI_OPEN_PROTOCOL_BY_DRIVER.
1504   If ProtocolGuid is NULL, then ASSERT().
1505
1506   @param  ControllerHandle     A handle for a controller to test.
1507   @param  DriverBindingHandle  Specifies the driver binding handle for the
1508                                driver.
1509   @param  ProtocolGuid         Specifies the protocol that the driver specified
1510                                by DriverBindingHandle opens in its Start()
1511                                function.
1512
1513   @retval EFI_SUCCESS          ControllerHandle is managed by the driver
1514                                specified by DriverBindingHandle.
1515   @retval EFI_UNSUPPORTED      ControllerHandle is not managed by the driver
1516                                specified by DriverBindingHandle.
1517
1518 **/
1519 EFI_STATUS
1520 EFIAPI
1521 IScsiTestManagedDevice (
1522   IN  EFI_HANDLE       ControllerHandle,
1523   IN  EFI_HANDLE       DriverBindingHandle,
1524   IN  EFI_GUID         *ProtocolGuid
1525   )
1526 {
1527   EFI_STATUS     Status;
1528   VOID           *ManagedInterface;
1529   EFI_HANDLE     NicControllerHandle;
1530
1531   ASSERT (ProtocolGuid != NULL);
1532
1533   NicControllerHandle = NetLibGetNicHandle (ControllerHandle, ProtocolGuid);
1534   if (NicControllerHandle == NULL) {
1535     return EFI_UNSUPPORTED;
1536   }
1537
1538   Status = gBS->OpenProtocol (
1539                   ControllerHandle,
1540                   (EFI_GUID *) ProtocolGuid,
1541                   &ManagedInterface,
1542                   DriverBindingHandle,
1543                   NicControllerHandle,
1544                   EFI_OPEN_PROTOCOL_BY_DRIVER
1545                   );
1546   if (!EFI_ERROR (Status)) {
1547     gBS->CloseProtocol (
1548            ControllerHandle,
1549            (EFI_GUID *) ProtocolGuid,
1550            DriverBindingHandle,
1551            NicControllerHandle
1552            );
1553     return EFI_UNSUPPORTED;
1554   }
1555
1556   if (Status != EFI_ALREADY_STARTED) {
1557     return EFI_UNSUPPORTED;
1558   }
1559
1560   return EFI_SUCCESS;
1561 }