2 The implementation of iSCSI protocol based on RFC3720.
4 Copyright (c) 2004 - 2017, 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
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.
15 #include "IScsiImpl.h"
17 UINT32 mDataSegPad
= 0;
20 Attach the iSCSI connection to the iSCSI session.
22 @param[in, out] Session The iSCSI session.
23 @param[in, out] Conn The iSCSI connection.
27 IScsiAttatchConnection (
28 IN OUT ISCSI_SESSION
*Session
,
29 IN OUT ISCSI_CONNECTION
*Conn
32 InsertTailList (&Session
->Conns
, &Conn
->Link
);
33 Conn
->Session
= Session
;
38 Detach the iSCSI connection from the session it belongs to.
40 @param[in, out] Conn The iSCSI connection.
44 IScsiDetatchConnection (
45 IN OUT ISCSI_CONNECTION
*Conn
48 RemoveEntryList (&Conn
->Link
);
49 Conn
->Session
->NumConns
--;
55 Check the sequence number according to RFC3720.
57 @param[in, out] ExpSN The currently expected sequence number.
58 @param[in] NewSN The sequence number to check.
60 @retval EFI_SUCCESS The check passed and the ExpSN is increased.
61 @retval EFI_NOT_READY Response was sent due to a retransmission request.
62 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error occurred.
71 if (!ISCSI_SEQ_EQ (NewSN
, *ExpSN
)) {
72 if (ISCSI_SEQ_LT (NewSN
, *ExpSN
)) {
78 return EFI_PROTOCOL_ERROR
;
91 Update the sequence numbers for the iSCSI command.
93 @param[in, out] Session The iSCSI session.
94 @param[in] MaxCmdSN Maximum CmdSN from the target.
95 @param[in] ExpCmdSN Next expected CmdSN from the target.
100 IN OUT ISCSI_SESSION
*Session
,
105 if (ISCSI_SEQ_LT (MaxCmdSN
, ExpCmdSN
- 1)) {
109 if (ISCSI_SEQ_GT (MaxCmdSN
, Session
->MaxCmdSN
)) {
110 Session
->MaxCmdSN
= MaxCmdSN
;
113 if (ISCSI_SEQ_GT (ExpCmdSN
, Session
->ExpCmdSN
)) {
114 Session
->ExpCmdSN
= ExpCmdSN
;
120 This function does the iSCSI connection login.
122 @param[in, out] Conn The iSCSI connection to login.
123 @param Timeout The timeout value in millisecond.
125 @retval EFI_SUCCESS The iSCSI connection is logged into the iSCSI target.
126 @retval EFI_TIMEOUT Timeout occurred during the login procedure.
127 @retval Others Other errors as indicated.
132 IN OUT ISCSI_CONNECTION
*Conn
,
139 // Start the timer, and wait Timeout seconds to establish the TCP connection.
141 Status
= gBS
->SetTimer (
144 MultU64x32 (Timeout
, TICKS_PER_MS
)
146 if (EFI_ERROR (Status
)) {
151 // Try to establish the tcp connection.
153 Status
= TcpIoConnect (&Conn
->TcpIo
, Conn
->TimeoutEvent
);
154 gBS
->SetTimer (Conn
->TimeoutEvent
, TimerCancel
, 0);
156 if (EFI_ERROR (Status
)) {
160 Conn
->State
= CONN_STATE_IN_LOGIN
;
163 // Connection is established, start the iSCSI Login.
166 Status
= IScsiSendLoginReq (Conn
);
167 if (EFI_ERROR (Status
)) {
171 Status
= IScsiReceiveLoginRsp (Conn
);
172 if (EFI_ERROR (Status
)) {
175 } while (Conn
->CurrentStage
!= ISCSI_FULL_FEATURE_PHASE
);
182 Reset the iSCSI connection.
184 @param[in, out] Conn The iSCSI connection to reset.
189 IN OUT ISCSI_CONNECTION
*Conn
192 TcpIoReset (&Conn
->TcpIo
);
197 Create a TCP connection for the iSCSI session.
199 @param[in] Session Points to the iSCSI session.
201 @return The newly created iSCSI connection.
205 IScsiCreateConnection (
206 IN ISCSI_SESSION
*Session
209 ISCSI_DRIVER_DATA
*Private
;
210 ISCSI_SESSION_CONFIG_NVDATA
*NvData
;
211 ISCSI_CONNECTION
*Conn
;
212 TCP_IO_CONFIG_DATA TcpIoConfig
;
213 TCP4_IO_CONFIG_DATA
*Tcp4IoConfig
;
214 TCP6_IO_CONFIG_DATA
*Tcp6IoConfig
;
217 Private
= Session
->Private
;
218 NvData
= &Session
->ConfigData
->SessionConfigData
;
220 Conn
= AllocateZeroPool (sizeof (ISCSI_CONNECTION
));
225 Conn
->Signature
= ISCSI_CONNECTION_SIGNATURE
;
226 Conn
->State
= CONN_STATE_FREE
;
227 Conn
->CurrentStage
= ISCSI_SECURITY_NEGOTIATION
;
228 Conn
->NextStage
= ISCSI_LOGIN_OPERATIONAL_NEGOTIATION
;
229 Conn
->AuthStep
= ISCSI_AUTH_INITIAL
;
231 Conn
->PartialReqSent
= FALSE
;
232 Conn
->PartialRspRcvd
= FALSE
;
233 Conn
->ParamNegotiated
= FALSE
;
234 Conn
->Cid
= Session
->NextCid
++;
235 Conn
->Ipv6Flag
= NvData
->IpMode
== IP_MODE_IP6
|| Session
->ConfigData
->AutoConfigureMode
== IP_MODE_AUTOCONFIG_IP6
;
237 Status
= gBS
->CreateEvent (
244 if (EFI_ERROR (Status
)) {
249 NetbufQueInit (&Conn
->RspQue
);
252 // Set the default connection-only parameters.
254 Conn
->MaxRecvDataSegmentLength
= DEFAULT_MAX_RECV_DATA_SEG_LEN
;
255 Conn
->HeaderDigest
= IScsiDigestNone
;
256 Conn
->DataDigest
= IScsiDigestNone
;
258 if (NvData
->DnsMode
) {
260 // perform dns process if target address expressed by domain name.
262 if (!Conn
->Ipv6Flag
) {
263 Status
= IScsiDns4 (Private
->Image
, Private
->Controller
, NvData
);
265 Status
= IScsiDns6 (Private
->Image
, Private
->Controller
, NvData
);
268 if (EFI_ERROR(Status
)) {
269 DEBUG ((EFI_D_ERROR
, "The configuration of Target address or DNS server address is invalid!\n"));
275 if (!Conn
->Ipv6Flag
) {
276 Tcp4IoConfig
= &TcpIoConfig
.Tcp4IoConfigData
;
278 CopyMem (&Tcp4IoConfig
->LocalIp
, &NvData
->LocalIp
, sizeof (EFI_IPv4_ADDRESS
));
279 CopyMem (&Tcp4IoConfig
->SubnetMask
, &NvData
->SubnetMask
, sizeof (EFI_IPv4_ADDRESS
));
280 CopyMem (&Tcp4IoConfig
->Gateway
, &NvData
->Gateway
, sizeof (EFI_IPv4_ADDRESS
));
281 CopyMem (&Tcp4IoConfig
->RemoteIp
, &NvData
->TargetIp
, sizeof (EFI_IPv4_ADDRESS
));
283 Tcp4IoConfig
->RemotePort
= NvData
->TargetPort
;
284 Tcp4IoConfig
->ActiveFlag
= TRUE
;
285 Tcp4IoConfig
->StationPort
= 0;
287 Tcp6IoConfig
= &TcpIoConfig
.Tcp6IoConfigData
;
289 CopyMem (&Tcp6IoConfig
->RemoteIp
, &NvData
->TargetIp
, sizeof (EFI_IPv6_ADDRESS
));
290 Tcp6IoConfig
->RemotePort
= NvData
->TargetPort
;
291 Tcp6IoConfig
->ActiveFlag
= TRUE
;
292 Tcp6IoConfig
->StationPort
= 0;
296 // Create the TCP IO for this connection.
298 Status
= TcpIoCreateSocket (
301 (UINT8
) (!Conn
->Ipv6Flag
? TCP_VERSION_4
: TCP_VERSION_6
),
305 if (EFI_ERROR (Status
)) {
306 gBS
->CloseEvent (Conn
->TimeoutEvent
);
316 Destroy an iSCSI connection.
318 @param[in] Conn The connection to destroy.
322 IScsiDestroyConnection (
323 IN ISCSI_CONNECTION
*Conn
326 TcpIoDestroySocket (&Conn
->TcpIo
);
328 NetbufQueFlush (&Conn
->RspQue
);
329 gBS
->CloseEvent (Conn
->TimeoutEvent
);
334 Retrieve the IPv6 Address/Prefix/Gateway from the established TCP connection, these informations
335 will be filled in the iSCSI Boot Firmware Table.
337 @param[in] Conn The connection used in the iSCSI login phase.
339 @retval EFI_SUCCESS Get the NIC information successfully.
340 @retval Others Other errors as indicated.
345 IN ISCSI_CONNECTION
*Conn
348 ISCSI_SESSION_CONFIG_NVDATA
*NvData
;
349 EFI_TCP6_PROTOCOL
*Tcp6
;
350 EFI_IP6_MODE_DATA Ip6ModeData
;
352 EFI_IPv6_ADDRESS
*TargetIp
;
354 UINT8 SubnetPrefixLength
;
357 NvData
= &Conn
->Session
->ConfigData
->SessionConfigData
;
358 TargetIp
= &NvData
->TargetIp
.v6
;
359 Tcp6
= Conn
->TcpIo
.Tcp
.Tcp6
;
361 ZeroMem (&Ip6ModeData
, sizeof (EFI_IP6_MODE_DATA
));
362 Status
= Tcp6
->GetModeData (
370 if (EFI_ERROR (Status
)) {
374 if (!Ip6ModeData
.IsConfigured
) {
375 Status
= EFI_ABORTED
;
379 IP6_COPY_ADDRESS (&NvData
->LocalIp
, &Ip6ModeData
.ConfigData
.StationAddress
);
381 NvData
->PrefixLength
= 0;
382 for (Index
= 0; Index
< Ip6ModeData
.AddressCount
; Index
++) {
383 if (EFI_IP6_EQUAL (&NvData
->LocalIp
.v6
, &Ip6ModeData
.AddressList
[Index
].Address
)) {
384 NvData
->PrefixLength
= Ip6ModeData
.AddressList
[Index
].PrefixLength
;
389 SubnetPrefixLength
= 0;
390 RouteEntry
= Ip6ModeData
.RouteCount
;
391 for (Index
= 0; Index
< Ip6ModeData
.RouteCount
; Index
++) {
392 if (NetIp6IsNetEqual (TargetIp
, &Ip6ModeData
.RouteTable
[Index
].Destination
, Ip6ModeData
.RouteTable
[Index
].PrefixLength
)) {
393 if (SubnetPrefixLength
< Ip6ModeData
.RouteTable
[Index
].PrefixLength
) {
394 SubnetPrefixLength
= Ip6ModeData
.RouteTable
[Index
].PrefixLength
;
399 if (RouteEntry
!= Ip6ModeData
.RouteCount
) {
400 IP6_COPY_ADDRESS (&NvData
->Gateway
, &Ip6ModeData
.RouteTable
[RouteEntry
].Gateway
);
404 if (Ip6ModeData
.AddressList
!= NULL
) {
405 FreePool (Ip6ModeData
.AddressList
);
407 if (Ip6ModeData
.GroupTable
!= NULL
) {
408 FreePool (Ip6ModeData
.GroupTable
);
410 if (Ip6ModeData
.RouteTable
!= NULL
) {
411 FreePool (Ip6ModeData
.RouteTable
);
413 if (Ip6ModeData
.NeighborCache
!= NULL
) {
414 FreePool (Ip6ModeData
.NeighborCache
);
416 if (Ip6ModeData
.PrefixTable
!= NULL
) {
417 FreePool (Ip6ModeData
.PrefixTable
);
419 if (Ip6ModeData
.IcmpTypeList
!= NULL
) {
420 FreePool (Ip6ModeData
.IcmpTypeList
);
427 Login the iSCSI session.
429 @param[in] Session The iSCSI session.
431 @retval EFI_SUCCESS The iSCSI session login procedure finished.
432 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
433 @retval EFI_NO_MEDIA There was a media error.
434 @retval Others Other errors as indicated.
439 IN ISCSI_SESSION
*Session
443 ISCSI_CONNECTION
*Conn
;
445 EFI_GUID
*ProtocolGuid
;
447 EFI_STATUS MediaStatus
;
450 // Check media status before session login.
452 MediaStatus
= EFI_SUCCESS
;
453 NetLibDetectMediaWaitTimeout (Session
->Private
->Controller
, ISCSI_CHECK_MEDIA_LOGIN_WAITING_TIME
, &MediaStatus
);
454 if (MediaStatus
!= EFI_SUCCESS
) {
459 // Set session identifier
461 CopyMem (Session
->Isid
, Session
->ConfigData
->SessionConfigData
.IsId
, 6);
467 // Create a connection for the session.
469 Conn
= IScsiCreateConnection (Session
);
471 return EFI_OUT_OF_RESOURCES
;
474 IScsiAttatchConnection (Session
, Conn
);
477 // Login througth the newly created connection.
479 Status
= IScsiConnLogin (Conn
, Session
->ConfigData
->SessionConfigData
.ConnectTimeout
);
480 if (EFI_ERROR (Status
)) {
481 IScsiConnReset (Conn
);
482 IScsiDetatchConnection (Conn
);
483 IScsiDestroyConnection (Conn
);
486 if (Status
!= EFI_TIMEOUT
) {
491 } while (RetryCount
<= Session
->ConfigData
->SessionConfigData
.ConnectRetryCount
);
493 if (!EFI_ERROR (Status
)) {
494 Session
->State
= SESSION_STATE_LOGGED_IN
;
496 if (!Conn
->Ipv6Flag
) {
497 ProtocolGuid
= &gEfiTcp4ProtocolGuid
;
499 ProtocolGuid
= &gEfiTcp6ProtocolGuid
;
502 Status
= gBS
->OpenProtocol (
506 Session
->Private
->Image
,
507 Session
->Private
->ExtScsiPassThruHandle
,
508 EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
511 ASSERT_EFI_ERROR (Status
);
513 if (Conn
->Ipv6Flag
) {
514 Status
= IScsiGetIp6NicInfo (Conn
);
523 Wait for IPsec negotiation, then try to login the iSCSI session again.
525 @param[in] Session The iSCSI session.
527 @retval EFI_SUCCESS The iSCSI session login procedure finished.
528 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
529 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error occurred.
533 IScsiSessionReLogin (
534 IN ISCSI_SESSION
*Session
539 EFI_STATUS TimerStatus
;
542 Status
= gBS
->CreateEvent (EVT_TIMER
, TPL_CALLBACK
, NULL
, NULL
, &Timer
);
543 if (EFI_ERROR (Status
)) {
547 Status
= gBS
->SetTimer (
550 ISCSI_WAIT_IPSEC_TIMEOUT
553 if (EFI_ERROR (Status
)) {
554 gBS
->CloseEvent (Timer
);
560 TimerStatus
= gBS
->CheckEvent (Timer
);
562 if (!EFI_ERROR (TimerStatus
)) {
563 Status
= IScsiSessionLogin (Session
);
566 } while (TimerStatus
== EFI_NOT_READY
);
568 gBS
->CloseEvent (Timer
);
574 Build and send the iSCSI login request to the iSCSI target according to
575 the current login stage.
577 @param[in] Conn The connection in the iSCSI login phase.
579 @retval EFI_SUCCESS The iSCSI login request PDU is built and sent on this
581 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
582 @retval EFI_DEVICE_ERROR Some kind of device error occurred.
587 IN ISCSI_CONNECTION
*Conn
594 // Build the Login Request PDU.
596 Pdu
= IScsiPrepareLoginReq (Conn
);
598 return EFI_DEVICE_ERROR
;
601 // Send it to the iSCSI target.
603 Status
= TcpIoTransmit (&Conn
->TcpIo
, Pdu
);
612 Receive and process the iSCSI login response.
614 @param[in] Conn The connection in the iSCSI login phase.
616 @retval EFI_SUCCESS The iSCSI login response PDU is received and processed.
617 @retval Others Other errors as indicated.
621 IScsiReceiveLoginRsp (
622 IN ISCSI_CONNECTION
*Conn
631 // Receive the iSCSI login response.
633 Status
= IScsiReceivePdu (Conn
, &Pdu
, NULL
, FALSE
, FALSE
, NULL
);
634 if (EFI_ERROR (Status
)) {
637 ASSERT (Pdu
!= NULL
);
640 // A Login Response is received; process it.
642 Status
= IScsiProcessLoginRsp (Conn
, Pdu
);
651 Add an iSCSI key-value pair as a string into the data segment of the Login Request PDU.
652 The DataSegmentLength and the actual size of the net buffer containing this PDU will be
655 @param[in, out] Pdu The iSCSI PDU whose data segment the key-value pair will
657 @param[in] Key The key name string.
658 @param[in] Value The value string.
660 @retval EFI_SUCCESS The key-value pair is added to the PDU's data segment and
661 the correspondence length fields are updated.
662 @retval EFI_OUT_OF_RESOURCES There is not enough space in the PDU to add the key-value
664 @retval EFI_PROTOCOL_ERROR There is no such data in the net buffer.
667 IScsiAddKeyValuePair (
677 ISCSI_LOGIN_REQUEST
*LoginReq
;
680 LoginReq
= (ISCSI_LOGIN_REQUEST
*) NetbufGetByte (Pdu
, 0, NULL
);
681 if (LoginReq
== NULL
) {
682 return EFI_PROTOCOL_ERROR
;
684 DataSegLen
= NTOH24 (LoginReq
->DataSegmentLength
);
686 KeyLen
= (UINT32
) AsciiStrLen (Key
);
687 ValueLen
= (UINT32
) AsciiStrLen (Value
);
690 // 1 byte for the key value separator '=' and 1 byte for the null
691 // delimiter after the value.
693 TotalLen
= KeyLen
+ 1 + ValueLen
+ 1;
696 // Allocate the space for the key-value pair.
698 Data
= (CHAR8
*) NetbufAllocSpace (Pdu
, TotalLen
, NET_BUF_TAIL
);
700 return EFI_OUT_OF_RESOURCES
;
705 CopyMem (Data
, Key
, KeyLen
);
714 CopyMem (Data
, Value
, ValueLen
);
720 // Update the DataSegmentLength
722 ISCSI_SET_DATASEG_LEN (LoginReq
, DataSegLen
+ TotalLen
);
729 Prepare the iSCSI login request to be sent according to the current login status.
731 @param[in, out] Conn The connection in the iSCSI login phase.
733 @return The pointer to the net buffer containing the iSCSI login request built.
734 @retval NULL Other errors as indicated.
738 IScsiPrepareLoginReq (
739 IN OUT ISCSI_CONNECTION
*Conn
742 ISCSI_SESSION
*Session
;
744 ISCSI_LOGIN_REQUEST
*LoginReq
;
747 Session
= Conn
->Session
;
749 Nbuf
= NetbufAlloc (sizeof (ISCSI_LOGIN_REQUEST
) + DEFAULT_MAX_RECV_DATA_SEG_LEN
);
754 LoginReq
= (ISCSI_LOGIN_REQUEST
*) NetbufAllocSpace (Nbuf
, sizeof (ISCSI_LOGIN_REQUEST
), NET_BUF_TAIL
);
755 if (LoginReq
== NULL
) {
759 ZeroMem (LoginReq
, sizeof (ISCSI_LOGIN_REQUEST
));
762 // Init the login request pdu
764 ISCSI_SET_OPCODE (LoginReq
, ISCSI_OPCODE_LOGIN_REQ
, ISCSI_REQ_IMMEDIATE
);
765 ISCSI_SET_STAGES (LoginReq
, Conn
->CurrentStage
, Conn
->NextStage
);
766 LoginReq
->VersionMax
= ISCSI_VERSION_MAX
;
767 LoginReq
->VersionMin
= ISCSI_VERSION_MIN
;
768 LoginReq
->Tsih
= HTONS (Session
->Tsih
);
769 LoginReq
->InitiatorTaskTag
= HTONL (Session
->InitiatorTaskTag
);
770 LoginReq
->Cid
= HTONS (Conn
->Cid
);
771 LoginReq
->CmdSN
= HTONL (Session
->CmdSN
);
774 // For the first Login Request on a coonection this is ExpStatSN for the
775 // old connection, and this field is only valid if the Login Request restarts
777 // For subsequent Login Requests it is used to acknowledge the Login Responses
778 // with their increasing StatSN values.
780 LoginReq
->ExpStatSN
= HTONL (Conn
->ExpStatSN
);
781 CopyMem (LoginReq
->Isid
, Session
->Isid
, sizeof (LoginReq
->Isid
));
783 if (Conn
->PartialRspRcvd
) {
785 // A partial response. The initiator must send an empty Login Request.
790 Status
= EFI_SUCCESS
;
792 switch (Conn
->CurrentStage
) {
793 case ISCSI_SECURITY_NEGOTIATION
:
795 // Both none authentication and CHAP authentication share the CHAP path.
798 if (Session
->AuthType
!= ISCSI_AUTH_TYPE_KRB
) {
799 Status
= IScsiCHAPToSendReq (Conn
, Nbuf
);
804 case ISCSI_LOGIN_OPERATIONAL_NEGOTIATION
:
806 // Only negotiate the parameter once.
808 if (!Conn
->ParamNegotiated
) {
809 IScsiFillOpParams (Conn
, Nbuf
);
812 ISCSI_SET_FLAG (LoginReq
, ISCSI_LOGIN_REQ_PDU_FLAG_TRANSIT
);
817 // An error occurs...
819 Status
= EFI_DEVICE_ERROR
;
823 if (EFI_ERROR (Status
)) {
828 // Pad the data segment if needed.
830 IScsiPadSegment (Nbuf
, ISCSI_GET_DATASEG_LEN (LoginReq
));
832 // Check whether we will issue the stage transition signal?
834 Conn
->TransitInitiated
= ISCSI_FLAG_ON (LoginReq
, ISCSI_LOGIN_REQ_PDU_FLAG_TRANSIT
);
842 Process the iSCSI Login Response.
844 @param[in, out] Conn The connection on which the iSCSI login response is received.
845 @param[in, out] Pdu The iSCSI login response PDU.
847 @retval EFI_SUCCESS The iSCSI login response PDU is processed, and all checks are passed.
848 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error occurred.
849 @retval EFI_MEDIA_CHANGED Target is redirected.
850 @retval Others Other errors as indicated.
854 IScsiProcessLoginRsp (
855 IN OUT ISCSI_CONNECTION
*Conn
,
860 ISCSI_SESSION
*Session
;
861 ISCSI_LOGIN_RESPONSE
*LoginRsp
;
869 Status
= EFI_SUCCESS
;
870 Session
= Conn
->Session
;
872 LoginRsp
= (ISCSI_LOGIN_RESPONSE
*) NetbufGetByte (Pdu
, 0, NULL
);
873 if (LoginRsp
== NULL
) {
874 return EFI_PROTOCOL_ERROR
;
876 if (!ISCSI_CHECK_OPCODE (LoginRsp
, ISCSI_OPCODE_LOGIN_RSP
)) {
878 // It is not a Login Response.
880 return EFI_PROTOCOL_ERROR
;
883 // Get the data segment, if any.
885 DataSegLen
= ISCSI_GET_DATASEG_LEN (LoginRsp
);
886 if (DataSegLen
!= 0) {
887 DataSeg
= NetbufGetByte (Pdu
, sizeof (ISCSI_LOGIN_RESPONSE
), NULL
);
892 // Check the status class in the login response PDU.
894 switch (LoginRsp
->StatusClass
) {
895 case ISCSI_LOGIN_STATUS_SUCCESS
:
897 // Just break here; the response and the data segment will be processed later.
901 case ISCSI_LOGIN_STATUS_REDIRECTION
:
903 // The target may be moved to a different address.
905 if (DataSeg
== NULL
) {
906 return EFI_PROTOCOL_ERROR
;
909 // Process the TargetAddress key-value strings in the data segment to update the
910 // target address info.
912 Status
= IScsiUpdateTargetAddress (Session
, (CHAR8
*) DataSeg
, DataSegLen
);
913 if (EFI_ERROR (Status
)) {
917 // Session will be restarted on this error status because the Target is
918 // redirected by this Login Response.
920 return EFI_MEDIA_CHANGED
;
924 // Initiator Error, Target Error, or any other undefined error code.
926 return EFI_PROTOCOL_ERROR
;
929 // The status is success; extract the wanted fields from the header segment.
931 Transit
= ISCSI_FLAG_ON (LoginRsp
, ISCSI_LOGIN_RSP_PDU_FLAG_TRANSIT
);
932 Continue
= ISCSI_FLAG_ON (LoginRsp
, ISCSI_LOGIN_RSP_PDU_FLAG_CONTINUE
);
934 CurrentStage
= ISCSI_GET_CURRENT_STAGE (LoginRsp
);
935 NextStage
= ISCSI_GET_NEXT_STAGE (LoginRsp
);
937 LoginRsp
->InitiatorTaskTag
= NTOHL (LoginRsp
->InitiatorTaskTag
);
939 if ((Transit
&& Continue
) ||
940 (CurrentStage
!= Conn
->CurrentStage
) ||
941 (!Conn
->TransitInitiated
&& Transit
) ||
942 (Transit
&& (NextStage
!= Conn
->NextStage
)) ||
943 (CompareMem (Session
->Isid
, LoginRsp
->Isid
, sizeof (LoginRsp
->Isid
)) != 0) ||
944 (LoginRsp
->InitiatorTaskTag
!= Session
->InitiatorTaskTag
)
947 // A Login Response with the C bit set to 1 MUST have the T bit set to 0.
948 // The CSG in the Login Response MUST be the same with the I-end of this connection.
949 // The T bit can't be 1 if the last Login Response sent by the initiator doesn't
950 // initiate the transistion.
951 // The NSG MUST be the same with the I-end of this connection if Transit is required.
952 // The ISID in the Login Response MUST be the same with this session.
954 return EFI_PROTOCOL_ERROR
;
957 LoginRsp
->StatSN
= NTOHL (LoginRsp
->StatSN
);
958 LoginRsp
->ExpCmdSN
= NTOHL (LoginRsp
->ExpCmdSN
);
959 LoginRsp
->MaxCmdSN
= NTOHL (LoginRsp
->MaxCmdSN
);
961 if ((Conn
->CurrentStage
== ISCSI_SECURITY_NEGOTIATION
) && (Conn
->AuthStep
== ISCSI_AUTH_INITIAL
)) {
963 // If the Login Request is a leading Login Request, the target MUST use
964 // the value presented in CmdSN as the target value for ExpCmdSN.
966 if ((Session
->State
== SESSION_STATE_FREE
) && (Session
->CmdSN
!= LoginRsp
->ExpCmdSN
)) {
967 return EFI_PROTOCOL_ERROR
;
971 // It's the initial Login Response, initialize the local ExpStatSN, MaxCmdSN
974 Conn
->ExpStatSN
= LoginRsp
->StatSN
+ 1;
975 Session
->MaxCmdSN
= LoginRsp
->MaxCmdSN
;
976 Session
->ExpCmdSN
= LoginRsp
->ExpCmdSN
;
979 // Check the StatSN of this PDU.
981 Status
= IScsiCheckSN (&Conn
->ExpStatSN
, LoginRsp
->StatSN
);
982 if (!EFI_ERROR (Status
)) {
984 // Update the MaxCmdSN and ExpCmdSN.
986 IScsiUpdateCmdSN (Session
, LoginRsp
->MaxCmdSN
, LoginRsp
->ExpCmdSN
);
992 // Trim off the header segment.
994 NetbufTrim (Pdu
, sizeof (ISCSI_LOGIN_RESPONSE
), NET_BUF_HEAD
);
997 // Queue this login response first in case it's a partial response so that
998 // later when the full response list is received we can combine these scattered
999 // responses' data segment and then process it.
1002 NetbufQueAppend (&Conn
->RspQue
, Pdu
);
1004 Conn
->PartialRspRcvd
= Continue
;
1007 // It is a partial response; must wait for another or more Request/Response
1008 // conversations to get the full response.
1013 switch (CurrentStage
) {
1014 case ISCSI_SECURITY_NEGOTIATION
:
1016 // In security negotiation stage, let CHAP module handle it.
1018 if (Session
->AuthType
!= ISCSI_AUTH_TYPE_KRB
) {
1019 Status
= IScsiCHAPOnRspReceived (Conn
);
1023 case ISCSI_LOGIN_OPERATIONAL_NEGOTIATION
:
1025 // Response received with negotiation response on iSCSI parameters: check them.
1027 Status
= IScsiCheckOpParams (Conn
);
1028 if (!EFI_ERROR (Status
)) {
1029 Conn
->ParamNegotiated
= TRUE
;
1036 // Should never get here.
1038 Status
= EFI_PROTOCOL_ERROR
;
1042 if (Transit
&& (Status
== EFI_SUCCESS
)) {
1044 // Do the state transition.
1046 Conn
->CurrentStage
= Conn
->NextStage
;
1048 if (Conn
->CurrentStage
== ISCSI_LOGIN_OPERATIONAL_NEGOTIATION
) {
1049 Conn
->NextStage
= ISCSI_FULL_FEATURE_PHASE
;
1052 // CurrentStage is iSCSI Full Feature. It is the Login-Final Response;
1053 // get the TSIH from the Login Response.
1055 Session
->Tsih
= NTOHS (LoginRsp
->Tsih
);
1059 // Flush the response(s) received.
1061 NetbufQueFlush (&Conn
->RspQue
);
1068 Updated the target information according the data received in the iSCSI
1069 login response with an target redirection status.
1071 @param[in, out] Session The iSCSI session.
1072 @param[in] Data The data segment that should contain the
1073 TargetAddress key-value list.
1074 @param[in] Len Length of the data.
1076 @retval EFI_SUCCESS The target address is updated.
1077 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
1078 @retval EFI_NOT_FOUND The TargetAddress key is not found.
1079 @retval Others Other errors as indicated.
1083 IScsiUpdateTargetAddress (
1084 IN OUT ISCSI_SESSION
*Session
,
1089 LIST_ENTRY
*KeyValueList
;
1090 CHAR8
*TargetAddress
;
1095 ISCSI_SESSION_CONFIG_NVDATA
*NvData
;
1097 KeyValueList
= IScsiBuildKeyValueList (Data
, Len
);
1098 if (KeyValueList
== NULL
) {
1099 return EFI_OUT_OF_RESOURCES
;
1102 Status
= EFI_NOT_FOUND
;
1103 NvData
= &Session
->ConfigData
->SessionConfigData
;
1106 TargetAddress
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_TARGET_ADDRESS
);
1107 if (TargetAddress
== NULL
) {
1112 // RFC 3720 defines format of the TargetAddress=domainname[:port][,portal-group-tag]
1113 // The domainname can be specified as either a DNS host name, adotted-decimal IPv4 address,
1114 // or a bracketed IPv6 address as specified in [RFC2732].
1116 if (NET_IS_DIGIT (TargetAddress
[0])) {
1118 // The domainname of the target is presented in a dotted-decimal IPv4 address format.
1120 IpStr
= TargetAddress
;
1122 while ((*TargetAddress
!= '\0') && (*TargetAddress
!= ':') && (*TargetAddress
!= ',')) {
1124 // NULL, ':', or ',' ends the IPv4 string.
1128 } else if (*TargetAddress
== ISCSI_REDIRECT_ADDR_START_DELIMITER
){
1130 // The domainname of the target is presented in a bracketed IPv6 address format.
1133 IpStr
= TargetAddress
;
1134 while ((*TargetAddress
!= '\0') && (*TargetAddress
!= ISCSI_REDIRECT_ADDR_END_DELIMITER
)) {
1136 // ']' ends the IPv6 string.
1141 if (*TargetAddress
!= ISCSI_REDIRECT_ADDR_END_DELIMITER
) {
1145 *TargetAddress
= '\0';
1150 // The domainname of the target is presented in the format of a DNS host name.
1152 IpStr
= TargetAddress
;
1154 while ((*TargetAddress
!= '\0') && (*TargetAddress
!= ':') && (*TargetAddress
!= ',')) {
1157 NvData
->DnsMode
= TRUE
;
1161 // Save the origial user setting which specifies the proxy/virtual iSCSI target.
1163 NvData
->OriginalTargetPort
= NvData
->TargetPort
;
1165 if (*TargetAddress
== ',') {
1167 // Comma and the portal group tag MUST be ommitted if the TargetAddress is sent
1168 // as the result of a redirection.
1171 } else if (*TargetAddress
== ':') {
1172 *TargetAddress
= '\0';
1176 Number
= AsciiStrDecimalToUintn (TargetAddress
);
1177 if (Number
> 0xFFFF) {
1180 NvData
->TargetPort
= (UINT16
) Number
;
1184 // The string only contains the Target address. Use the well-known port.
1186 NvData
->TargetPort
= ISCSI_WELL_KNOWN_PORT
;
1190 // Save the origial user setting which specifies the proxy/virtual iSCSI target.
1192 CopyMem (&NvData
->OriginalTargetIp
, &NvData
->TargetIp
, sizeof (EFI_IP_ADDRESS
));
1195 // Update the target IP address.
1197 if (NvData
->IpMode
< IP_MODE_AUTOCONFIG
) {
1198 IpMode
= NvData
->IpMode
;
1200 IpMode
= Session
->ConfigData
->AutoConfigureMode
;
1203 if (NvData
->DnsMode
) {
1205 // Target address is expressed as URL format, just save it and
1206 // do DNS resolution when creating a TCP connection.
1208 if (AsciiStrSize (IpStr
) > sizeof (Session
->ConfigData
->SessionConfigData
.TargetUrl
)){
1209 return EFI_INVALID_PARAMETER
;
1211 CopyMem (&Session
->ConfigData
->SessionConfigData
.TargetUrl
, IpStr
, AsciiStrSize (IpStr
));
1213 Status
= IScsiAsciiStrToIp (
1216 &Session
->ConfigData
->SessionConfigData
.TargetIp
1219 if (EFI_ERROR (Status
)) {
1222 NvData
->RedirectFlag
= TRUE
;
1228 IScsiFreeKeyValueList (KeyValueList
);
1235 The callback function to free the net buffer list.
1237 @param[in] Arg The opaque parameter.
1246 ASSERT (Arg
!= NULL
);
1248 NetbufFreeList ((LIST_ENTRY
*) Arg
);
1254 The callback function called in NetBufFree; it does nothing.
1256 @param[in] Arg The opaque parameter.
1269 Receive an iSCSI response PDU. An iSCSI response PDU contains an iSCSI PDU header and
1270 an optional data segment. The two parts will be put into two blocks of buffers in the
1271 net buffer. The digest check will be conducted in this function if needed and the digests
1272 will be trimmed from the PDU buffer.
1274 @param[in] Conn The iSCSI connection to receive data from.
1275 @param[out] Pdu The received iSCSI pdu.
1276 @param[in] Context The context used to describe information on the caller provided
1277 buffer to receive data segment of the iSCSI pdu. It is optional.
1278 @param[in] HeaderDigest Whether there will be header digest received.
1279 @param[in] DataDigest Whether there will be data digest.
1280 @param[in] TimeoutEvent The timeout event. It is optional.
1282 @retval EFI_SUCCESS An iSCSI pdu is received.
1283 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
1284 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error occurred.
1285 @retval Others Other errors as indicated.
1290 IN ISCSI_CONNECTION
*Conn
,
1292 IN ISCSI_IN_BUFFER_CONTEXT
*Context
, OPTIONAL
1293 IN BOOLEAN HeaderDigest
,
1294 IN BOOLEAN DataDigest
,
1295 IN EFI_EVENT TimeoutEvent OPTIONAL
1298 LIST_ENTRY
*NbufList
;
1304 UINT32 InDataOffset
;
1305 NET_FRAGMENT Fragment
[2];
1306 UINT32 FragmentCount
;
1308 UINT32 PadAndCRC32
[2];
1310 NbufList
= AllocatePool (sizeof (LIST_ENTRY
));
1311 if (NbufList
== NULL
) {
1312 return EFI_OUT_OF_RESOURCES
;
1315 InitializeListHead (NbufList
);
1318 // The header digest will be received together with the PDU header, if exists.
1320 Len
= sizeof (ISCSI_BASIC_HEADER
) + (HeaderDigest
? sizeof (UINT32
) : 0);
1321 PduHdr
= NetbufAlloc (Len
);
1322 if (PduHdr
== NULL
) {
1323 Status
= EFI_OUT_OF_RESOURCES
;
1327 Header
= NetbufAllocSpace (PduHdr
, Len
, NET_BUF_TAIL
);
1328 if (Header
== NULL
) {
1329 Status
= EFI_OUT_OF_RESOURCES
;
1332 InsertTailList (NbufList
, &PduHdr
->List
);
1335 // First step, receive the BHS of the PDU.
1337 Status
= TcpIoReceive (&Conn
->TcpIo
, PduHdr
, FALSE
, TimeoutEvent
);
1339 if (EFI_ERROR (Status
)) {
1345 // TODO: check the header-digest.
1348 // Trim off the digest.
1350 NetbufTrim (PduHdr
, sizeof (UINT32
), NET_BUF_TAIL
);
1353 Len
= ISCSI_GET_DATASEG_LEN (Header
);
1361 // Get the length of the padding bytes of the data segment.
1363 PadLen
= ISCSI_GET_PAD_LEN (Len
);
1365 switch (ISCSI_GET_OPCODE (Header
)) {
1366 case ISCSI_OPCODE_SCSI_DATA_IN
:
1368 // To reduce memory copy overhead, try to use the buffer described by Context
1369 // if the PDU is an iSCSI SCSI data.
1371 InDataOffset
= ISCSI_GET_BUFFER_OFFSET (Header
);
1372 if ((Context
== NULL
) || ((InDataOffset
+ Len
) > Context
->InDataLen
)) {
1373 Status
= EFI_PROTOCOL_ERROR
;
1377 Fragment
[0].Len
= Len
;
1378 Fragment
[0].Bulk
= Context
->InData
+ InDataOffset
;
1380 if (DataDigest
|| (PadLen
!= 0)) {
1382 // The data segment is padded. Use two fragments to receive it:
1383 // the first to receive the useful data; the second to receive the padding.
1385 Fragment
[1].Len
= PadLen
+ (DataDigest
? sizeof (UINT32
) : 0);
1386 Fragment
[1].Bulk
= (UINT8
*)PadAndCRC32
+ (4 - PadLen
);
1393 DataSeg
= NetbufFromExt (&Fragment
[0], FragmentCount
, 0, 0, IScsiNbufExtFree
, NULL
);
1394 if (DataSeg
== NULL
) {
1395 Status
= EFI_OUT_OF_RESOURCES
;
1401 case ISCSI_OPCODE_SCSI_RSP
:
1402 case ISCSI_OPCODE_NOP_IN
:
1403 case ISCSI_OPCODE_LOGIN_RSP
:
1404 case ISCSI_OPCODE_TEXT_RSP
:
1405 case ISCSI_OPCODE_ASYNC_MSG
:
1406 case ISCSI_OPCODE_REJECT
:
1407 case ISCSI_OPCODE_VENDOR_T0
:
1408 case ISCSI_OPCODE_VENDOR_T1
:
1409 case ISCSI_OPCODE_VENDOR_T2
:
1411 // Allocate buffer to receive the data segment.
1413 Len
+= PadLen
+ (DataDigest
? sizeof (UINT32
) : 0);
1414 DataSeg
= NetbufAlloc (Len
);
1415 if (DataSeg
== NULL
) {
1416 Status
= EFI_OUT_OF_RESOURCES
;
1420 NetbufAllocSpace (DataSeg
, Len
, NET_BUF_TAIL
);
1424 Status
= EFI_PROTOCOL_ERROR
;
1428 InsertTailList (NbufList
, &DataSeg
->List
);
1431 // Receive the data segment with the data digest, if any.
1433 Status
= TcpIoReceive (&Conn
->TcpIo
, DataSeg
, FALSE
, TimeoutEvent
);
1435 if (EFI_ERROR (Status
)) {
1441 // TODO: Check the data digest.
1443 NetbufTrim (DataSeg
, sizeof (UINT32
), NET_BUF_TAIL
);
1448 // Trim off the padding bytes in the data segment.
1450 NetbufTrim (DataSeg
, PadLen
, NET_BUF_TAIL
);
1455 // Form the pdu from a list of pdu segments.
1457 *Pdu
= NetbufFromBufList (NbufList
, 0, 0, IScsiFreeNbufList
, NbufList
);
1459 Status
= EFI_OUT_OF_RESOURCES
;
1464 if (EFI_ERROR (Status
)) {
1466 // Free the Nbufs in this NbufList and the NbufList itself.
1468 IScsiFreeNbufList (NbufList
);
1476 Check and get the result of the parameter negotiation.
1478 @param[in, out] Conn The connection in iSCSI login.
1480 @retval EFI_SUCCESS The parmeter check is passed and negotiation is finished.
1481 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol error occurred.
1482 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
1486 IScsiCheckOpParams (
1487 IN OUT ISCSI_CONNECTION
*Conn
1491 LIST_ENTRY
*KeyValueList
;
1494 ISCSI_SESSION
*Session
;
1498 ASSERT (Conn
->RspQue
.BufNum
!= 0);
1500 Session
= Conn
->Session
;
1502 Len
= Conn
->RspQue
.BufSize
;
1503 Data
= AllocatePool (Len
);
1505 return EFI_OUT_OF_RESOURCES
;
1508 NetbufQueCopy (&Conn
->RspQue
, 0, Len
, (UINT8
*) Data
);
1510 Status
= EFI_PROTOCOL_ERROR
;
1513 // Extract the Key-Value pairs into a list.
1515 KeyValueList
= IScsiBuildKeyValueList (Data
, Len
);
1516 if (KeyValueList
== NULL
) {
1523 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_HEADER_DIGEST
);
1524 if (Value
== NULL
) {
1528 if (AsciiStrCmp (Value
, "CRC32") == 0) {
1529 if (Conn
->HeaderDigest
!= IScsiDigestCRC32
) {
1532 } else if (AsciiStrCmp (Value
, ISCSI_KEY_VALUE_NONE
) == 0) {
1533 Conn
->HeaderDigest
= IScsiDigestNone
;
1540 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_DATA_DIGEST
);
1541 if (Value
== NULL
) {
1545 if (AsciiStrCmp (Value
, "CRC32") == 0) {
1546 if (Conn
->DataDigest
!= IScsiDigestCRC32
) {
1549 } else if (AsciiStrCmp (Value
, ISCSI_KEY_VALUE_NONE
) == 0) {
1550 Conn
->DataDigest
= IScsiDigestNone
;
1555 // ErrorRecoveryLevel: result fuction is Minimum.
1557 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_ERROR_RECOVERY_LEVEL
);
1558 if (Value
== NULL
) {
1562 NumericValue
= IScsiNetNtoi (Value
);
1563 if (NumericValue
> 2) {
1567 Session
->ErrorRecoveryLevel
= (UINT8
) MIN (Session
->ErrorRecoveryLevel
, NumericValue
);
1570 // InitialR2T: result function is OR.
1572 if (!Session
->InitialR2T
) {
1573 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_INITIAL_R2T
);
1574 if (Value
== NULL
) {
1578 Session
->InitialR2T
= (BOOLEAN
) (AsciiStrCmp (Value
, "Yes") == 0);
1582 // ImmediateData: result function is AND.
1584 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_IMMEDIATE_DATA
);
1585 if (Value
== NULL
) {
1589 Session
->ImmediateData
= (BOOLEAN
) (Session
->ImmediateData
&& (BOOLEAN
) (AsciiStrCmp (Value
, "Yes") == 0));
1592 // MaxRecvDataSegmentLength is declarative.
1594 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_MAX_RECV_DATA_SEGMENT_LENGTH
);
1595 if (Value
!= NULL
) {
1596 Conn
->MaxRecvDataSegmentLength
= (UINT32
) IScsiNetNtoi (Value
);
1599 // MaxBurstLength: result funtion is Mininum.
1601 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_MAX_BURST_LENGTH
);
1602 if (Value
== NULL
) {
1606 NumericValue
= IScsiNetNtoi (Value
);
1607 Session
->MaxBurstLength
= (UINT32
) MIN (Session
->MaxBurstLength
, NumericValue
);
1610 // FirstBurstLength: result function is Minimum. Irrelevant when InitialR2T=Yes and
1611 // ImmediateData=No.
1613 if (!(Session
->InitialR2T
&& !Session
->ImmediateData
)) {
1614 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_FIRST_BURST_LENGTH
);
1615 if (Value
== NULL
) {
1619 NumericValue
= IScsiNetNtoi (Value
);
1620 Session
->FirstBurstLength
= (UINT32
) MIN (Session
->FirstBurstLength
, NumericValue
);
1624 // MaxConnections: result function is Minimum.
1626 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_MAX_CONNECTIONS
);
1627 if (Value
== NULL
) {
1631 NumericValue
= IScsiNetNtoi (Value
);
1632 if ((NumericValue
== 0) || (NumericValue
> 65535)) {
1636 Session
->MaxConnections
= (UINT32
) MIN (Session
->MaxConnections
, NumericValue
);
1639 // DataPDUInOrder: result function is OR.
1641 if (!Session
->DataPDUInOrder
) {
1642 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_DATA_PDU_IN_ORDER
);
1643 if (Value
== NULL
) {
1647 Session
->DataPDUInOrder
= (BOOLEAN
) (AsciiStrCmp (Value
, "Yes") == 0);
1651 // DataSequenceInorder: result function is OR.
1653 if (!Session
->DataSequenceInOrder
) {
1654 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_DATA_SEQUENCE_IN_ORDER
);
1655 if (Value
== NULL
) {
1659 Session
->DataSequenceInOrder
= (BOOLEAN
) (AsciiStrCmp (Value
, "Yes") == 0);
1663 // DefaultTime2Wait: result function is Maximum.
1665 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_DEFAULT_TIME2WAIT
);
1666 if (Value
== NULL
) {
1670 NumericValue
= IScsiNetNtoi (Value
);
1671 if (NumericValue
== 0) {
1672 Session
->DefaultTime2Wait
= 0;
1673 } else if (NumericValue
> 3600) {
1676 Session
->DefaultTime2Wait
= (UINT32
) MAX (Session
->DefaultTime2Wait
, NumericValue
);
1679 // DefaultTime2Retain: result function is Minimum.
1681 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_DEFAULT_TIME2RETAIN
);
1682 if (Value
== NULL
) {
1686 NumericValue
= IScsiNetNtoi (Value
);
1687 if (NumericValue
== 0) {
1688 Session
->DefaultTime2Retain
= 0;
1689 } else if (NumericValue
> 3600) {
1692 Session
->DefaultTime2Retain
= (UINT32
) MIN (Session
->DefaultTime2Retain
, NumericValue
);
1695 // MaxOutstandingR2T: result function is Minimum.
1697 Value
= IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_MAX_OUTSTANDING_R2T
);
1698 if (Value
== NULL
) {
1702 NumericValue
= IScsiNetNtoi (Value
);
1703 if ((NumericValue
== 0) || (NumericValue
> 65535)) {
1707 Session
->MaxOutstandingR2T
= (UINT16
) MIN (Session
->MaxOutstandingR2T
, NumericValue
);
1710 // Remove declarative key-value pairs, if any.
1712 IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_SESSION_TYPE
);
1713 IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_TARGET_ALIAS
);
1714 IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_TARGET_PORTAL_GROUP_TAG
);
1718 // Remove the key-value that may not needed for result function is OR.
1720 IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_INITIAL_R2T
);
1721 IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_DATA_PDU_IN_ORDER
);
1722 IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_DATA_SEQUENCE_IN_ORDER
);
1725 // Remove irrelevant parameter, if any.
1727 if (Session
->InitialR2T
&& !Session
->ImmediateData
) {
1728 IScsiGetValueByKeyFromList (KeyValueList
, ISCSI_KEY_FIRST_BURST_LENGTH
);
1731 if (IsListEmpty (KeyValueList
)) {
1733 // Succeed if no more keys in the list.
1735 Status
= EFI_SUCCESS
;
1740 IScsiFreeKeyValueList (KeyValueList
);
1749 Fill the operational parameters.
1751 @param[in] Conn The connection in iSCSI login.
1752 @param[in, out] Pdu The iSCSI login request PDU to fill the parameters.
1757 IN ISCSI_CONNECTION
*Conn
,
1761 ISCSI_SESSION
*Session
;
1764 Session
= Conn
->Session
;
1766 AsciiSPrint (Value
, sizeof (Value
), "%a", (Conn
->HeaderDigest
== IScsiDigestCRC32
) ? "None,CRC32" : "None");
1767 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_HEADER_DIGEST
, Value
);
1769 AsciiSPrint (Value
, sizeof (Value
), "%a", (Conn
->DataDigest
== IScsiDigestCRC32
) ? "None,CRC32" : "None");
1770 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_DATA_DIGEST
, Value
);
1772 AsciiSPrint (Value
, sizeof (Value
), "%d", Session
->ErrorRecoveryLevel
);
1773 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_ERROR_RECOVERY_LEVEL
, Value
);
1775 AsciiSPrint (Value
, sizeof (Value
), "%a", Session
->InitialR2T
? "Yes" : "No");
1776 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_INITIAL_R2T
, Value
);
1778 AsciiSPrint (Value
, sizeof (Value
), "%a", Session
->ImmediateData
? "Yes" : "No");
1779 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_IMMEDIATE_DATA
, Value
);
1781 AsciiSPrint (Value
, sizeof (Value
), "%d", MAX_RECV_DATA_SEG_LEN_IN_FFP
);
1782 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_MAX_RECV_DATA_SEGMENT_LENGTH
, Value
);
1784 AsciiSPrint (Value
, sizeof (Value
), "%d", Session
->MaxBurstLength
);
1785 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_MAX_BURST_LENGTH
, Value
);
1787 AsciiSPrint (Value
, sizeof (Value
), "%d", Session
->FirstBurstLength
);
1788 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_FIRST_BURST_LENGTH
, Value
);
1790 AsciiSPrint (Value
, sizeof (Value
), "%d", Session
->MaxConnections
);
1791 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_MAX_CONNECTIONS
, Value
);
1793 AsciiSPrint (Value
, sizeof (Value
), "%a", Session
->DataPDUInOrder
? "Yes" : "No");
1794 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_DATA_PDU_IN_ORDER
, Value
);
1796 AsciiSPrint (Value
, sizeof (Value
), "%a", Session
->DataSequenceInOrder
? "Yes" : "No");
1797 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_DATA_SEQUENCE_IN_ORDER
, Value
);
1799 AsciiSPrint (Value
, sizeof (Value
), "%d", Session
->DefaultTime2Wait
);
1800 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_DEFAULT_TIME2WAIT
, Value
);
1802 AsciiSPrint (Value
, sizeof (Value
), "%d", Session
->DefaultTime2Retain
);
1803 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_DEFAULT_TIME2RETAIN
, Value
);
1805 AsciiSPrint (Value
, sizeof (Value
), "%d", Session
->MaxOutstandingR2T
);
1806 IScsiAddKeyValuePair (Pdu
, ISCSI_KEY_MAX_OUTSTANDING_R2T
, Value
);
1811 Pad the iSCSI AHS or data segment to an integer number of 4 byte words.
1813 @param[in, out] Pdu The iSCSI pdu which contains segments to pad.
1814 @param[in] Len The length of the last segment in the PDU.
1816 @retval EFI_SUCCESS The segment is padded or there is no need to pad it.
1817 @retval EFI_OUT_OF_RESOURCES There is not enough remaining free space to add the
1822 IN OUT NET_BUF
*Pdu
,
1829 PadLen
= ISCSI_GET_PAD_LEN (Len
);
1832 Data
= NetbufAllocSpace (Pdu
, PadLen
, NET_BUF_TAIL
);
1834 return EFI_OUT_OF_RESOURCES
;
1837 ZeroMem (Data
, PadLen
);
1845 Build a key-value list from the data segment.
1847 @param[in] Data The data segment containing the key-value pairs.
1848 @param[in] Len Length of the data segment.
1850 @return The key-value list.
1851 @retval NULL Other errors as indicated.
1855 IScsiBuildKeyValueList (
1860 LIST_ENTRY
*ListHead
;
1861 ISCSI_KEY_VALUE_PAIR
*KeyValuePair
;
1863 ListHead
= AllocatePool (sizeof (LIST_ENTRY
));
1864 if (ListHead
== NULL
) {
1868 InitializeListHead (ListHead
);
1871 KeyValuePair
= AllocatePool (sizeof (ISCSI_KEY_VALUE_PAIR
));
1872 if (KeyValuePair
== NULL
) {
1876 InitializeListHead (&KeyValuePair
->List
);
1878 KeyValuePair
->Key
= Data
;
1880 while ((Len
> 0) && (*Data
!= '=')) {
1891 FreePool (KeyValuePair
);
1895 KeyValuePair
->Value
= Data
;
1897 InsertTailList (ListHead
, &KeyValuePair
->List
);;
1899 Data
+= AsciiStrLen (KeyValuePair
->Value
) + 1;
1900 Len
-= (UINT32
) AsciiStrLen (KeyValuePair
->Value
) + 1;
1907 IScsiFreeKeyValueList (ListHead
);
1914 Get the value string by the key name from the key-value list. If found,
1915 the key-value entry will be removed from the list.
1917 @param[in, out] KeyValueList The key-value list.
1918 @param[in] Key The key name to find.
1920 @return The value string.
1921 @retval NULL The key value pair cannot be found.
1925 IScsiGetValueByKeyFromList (
1926 IN OUT LIST_ENTRY
*KeyValueList
,
1931 ISCSI_KEY_VALUE_PAIR
*KeyValuePair
;
1936 NET_LIST_FOR_EACH (Entry
, KeyValueList
) {
1937 KeyValuePair
= NET_LIST_USER_STRUCT (Entry
, ISCSI_KEY_VALUE_PAIR
, List
);
1939 if (AsciiStrCmp (KeyValuePair
->Key
, Key
) == 0) {
1940 Value
= KeyValuePair
->Value
;
1942 RemoveEntryList (&KeyValuePair
->List
);
1943 FreePool (KeyValuePair
);
1953 Free the key-value list.
1955 @param[in] KeyValueList The key-value list.
1959 IScsiFreeKeyValueList (
1960 IN LIST_ENTRY
*KeyValueList
1964 ISCSI_KEY_VALUE_PAIR
*KeyValuePair
;
1966 while (!IsListEmpty (KeyValueList
)) {
1967 Entry
= NetListRemoveHead (KeyValueList
);
1968 KeyValuePair
= NET_LIST_USER_STRUCT (Entry
, ISCSI_KEY_VALUE_PAIR
, List
);
1970 FreePool (KeyValuePair
);
1973 FreePool (KeyValueList
);
1978 Normalize the iSCSI name according to RFC.
1980 @param[in, out] Name The iSCSI name.
1981 @param[in] Len Length of the iSCSI name.
1983 @retval EFI_SUCCESS The iSCSI name is valid and normalized.
1984 @retval EFI_PROTOCOL_ERROR The iSCSI name is malformatted or not in the IQN format.
1988 IScsiNormalizeName (
1995 for (Index
= 0; Index
< Len
; Index
++) {
1996 if (NET_IS_UPPER_CASE_CHAR (Name
[Index
])) {
1998 // Convert the upper-case characters to lower-case ones.
2000 Name
[Index
] = (CHAR8
) (Name
[Index
] - 'A' + 'a');
2003 if (!NET_IS_LOWER_CASE_CHAR (Name
[Index
]) &&
2004 !NET_IS_DIGIT (Name
[Index
]) &&
2005 (Name
[Index
] != '-') &&
2006 (Name
[Index
] != '.') &&
2007 (Name
[Index
] != ':')
2010 // ASCII dash, dot, colon lower-case characters and digit characters
2013 return EFI_PROTOCOL_ERROR
;
2017 if ((Len
< 4) || (CompareMem (Name
, "iqn.", 4) != 0)) {
2019 // Only IQN format is accepted now.
2021 return EFI_PROTOCOL_ERROR
;
2029 Create an iSCSI task control block.
2031 @param[in] Conn The connection on which the task control block will be created.
2032 @param[out] Tcb The newly created task control block.
2034 @retval EFI_SUCCESS The task control block is created.
2035 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
2036 @retval EFI_NOT_READY The target cannot accept new commands.
2041 IN ISCSI_CONNECTION
*Conn
,
2045 ISCSI_SESSION
*Session
;
2048 ASSERT (Tcb
!= NULL
);
2050 Session
= Conn
->Session
;
2052 if (ISCSI_SEQ_GT (Session
->CmdSN
, Session
->MaxCmdSN
)) {
2053 return EFI_NOT_READY
;
2056 NewTcb
= AllocateZeroPool (sizeof (ISCSI_TCB
));
2057 if (NewTcb
== NULL
) {
2058 return EFI_OUT_OF_RESOURCES
;
2061 InitializeListHead (&NewTcb
->Link
);
2063 NewTcb
->SoFarInOrder
= TRUE
;
2064 NewTcb
->InitiatorTaskTag
= Session
->InitiatorTaskTag
;
2065 NewTcb
->CmdSN
= Session
->CmdSN
;
2066 NewTcb
->Conn
= Conn
;
2068 InsertTailList (&Session
->TcbList
, &NewTcb
->Link
);
2071 // Advance the initiator task tag.
2073 Session
->InitiatorTaskTag
++;
2083 Delete the tcb from the connection and destroy it.
2085 @param[in] Tcb The tcb to delete.
2093 RemoveEntryList (&Tcb
->Link
);
2100 Find the task control block by the initator task tag.
2102 @param[in] TcbList The tcb list.
2103 @param[in] InitiatorTaskTag The initiator task tag.
2105 @return The task control block found.
2106 @retval NULL The task control block cannot be found.
2111 IN LIST_ENTRY
*TcbList
,
2112 IN UINT32 InitiatorTaskTag
2120 NET_LIST_FOR_EACH (Entry
, TcbList
) {
2121 Tcb
= NET_LIST_USER_STRUCT (Entry
, ISCSI_TCB
, Link
);
2123 if (Tcb
->InitiatorTaskTag
== InitiatorTaskTag
) {
2133 Create a data segment, pad it, and calculate the CRC if needed.
2135 @param[in] Data The data to fill into the data segment.
2136 @param[in] Len Length of the data.
2137 @param[in] DataDigest Whether to calculate CRC for this data segment.
2139 @return The net buffer wrapping the data segment.
2143 IScsiNewDataSegment (
2146 IN BOOLEAN DataDigest
2149 NET_FRAGMENT Fragment
[2];
2150 UINT32 FragmentCount
;
2154 Fragment
[0].Len
= Len
;
2155 Fragment
[0].Bulk
= Data
;
2157 PadLen
= ISCSI_GET_PAD_LEN (Len
);
2159 Fragment
[1].Len
= PadLen
;
2160 Fragment
[1].Bulk
= (UINT8
*) &mDataSegPad
;
2167 DataSeg
= NetbufFromExt (&Fragment
[0], FragmentCount
, 0, 0, IScsiNbufExtFree
, NULL
);
2174 Create a iSCSI SCSI command PDU to encapsulate the command issued
2175 by SCSI through the EXT SCSI PASS THRU Protocol.
2177 @param[in] Packet The EXT SCSI PASS THRU request packet containing the SCSI command.
2178 @param[in] Lun The LUN.
2179 @param[in] Tcb The tcb associated with this SCSI command.
2181 @return The created iSCSI SCSI command PDU.
2182 @retval NULL Other errors as indicated.
2186 IScsiNewScsiCmdPdu (
2187 IN EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET
*Packet
,
2192 LIST_ENTRY
*NbufList
;
2196 SCSI_COMMAND
*ScsiCmd
;
2199 ISCSI_ADDITIONAL_HEADER
*Header
;
2200 ISCSI_BI_EXP_READ_DATA_LEN_AHS
*BiExpReadDataLenAHS
;
2201 ISCSI_SESSION
*Session
;
2202 UINT32 ImmediateDataLen
;
2206 if (Packet
->DataDirection
== DataBi
) {
2208 // Bidirectional Read/Write command, the bidirectional expected
2209 // read data length AHS is required.
2211 AHSLength
+= sizeof (ISCSI_BI_EXP_READ_DATA_LEN_AHS
);
2214 if (Packet
->CdbLength
> 16) {
2216 // The CDB exceeds 16 bytes. An extended CDB AHS is required.
2218 AHSLength
= (UINT8
) (AHSLength
+ ISCSI_ROUNDUP (Packet
->CdbLength
- 16) + sizeof (ISCSI_ADDITIONAL_HEADER
));
2221 Length
= sizeof (SCSI_COMMAND
) + AHSLength
;
2222 PduHeader
= NetbufAlloc (Length
);
2223 if (PduHeader
== NULL
) {
2227 ScsiCmd
= (SCSI_COMMAND
*) NetbufAllocSpace (PduHeader
, Length
, NET_BUF_TAIL
);
2228 if (ScsiCmd
== NULL
) {
2229 NetbufFree (PduHeader
);
2232 Header
= (ISCSI_ADDITIONAL_HEADER
*) (ScsiCmd
+ 1);
2234 ZeroMem (ScsiCmd
, Length
);
2236 ISCSI_SET_OPCODE (ScsiCmd
, ISCSI_OPCODE_SCSI_CMD
, 0);
2237 ISCSI_SET_FLAG (ScsiCmd
, ISCSI_TASK_ATTR_SIMPLE
);
2240 // Set the READ/WRITE flags according to the IO type of this request.
2242 switch (Packet
->DataDirection
) {
2244 ISCSI_SET_FLAG (ScsiCmd
, SCSI_CMD_PDU_FLAG_READ
);
2245 ScsiCmd
->ExpDataXferLength
= NTOHL (Packet
->InTransferLength
);
2249 ISCSI_SET_FLAG (ScsiCmd
, SCSI_CMD_PDU_FLAG_WRITE
);
2250 ScsiCmd
->ExpDataXferLength
= NTOHL (Packet
->OutTransferLength
);
2254 ISCSI_SET_FLAG (ScsiCmd
, SCSI_CMD_PDU_FLAG_READ
| SCSI_CMD_PDU_FLAG_WRITE
);
2255 ScsiCmd
->ExpDataXferLength
= NTOHL (Packet
->OutTransferLength
);
2258 // Fill the bidirectional expected read data length AHS.
2260 BiExpReadDataLenAHS
= (ISCSI_BI_EXP_READ_DATA_LEN_AHS
*) Header
;
2261 Header
= (ISCSI_ADDITIONAL_HEADER
*) (BiExpReadDataLenAHS
+ 1);
2263 BiExpReadDataLenAHS
->Length
= NTOHS (5);
2264 BiExpReadDataLenAHS
->Type
= ISCSI_AHS_TYPE_BI_EXP_READ_DATA_LEN
;
2265 BiExpReadDataLenAHS
->ExpReadDataLength
= NTOHL (Packet
->InTransferLength
);
2270 ScsiCmd
->TotalAHSLength
= AHSLength
;
2271 CopyMem (ScsiCmd
->Lun
, &Lun
, sizeof (ScsiCmd
->Lun
));
2272 ScsiCmd
->InitiatorTaskTag
= NTOHL (Tcb
->InitiatorTaskTag
);
2273 ScsiCmd
->CmdSN
= NTOHL (Tcb
->CmdSN
);
2274 ScsiCmd
->ExpStatSN
= NTOHL (Tcb
->Conn
->ExpStatSN
);
2276 CopyMem (ScsiCmd
->Cdb
, Packet
->Cdb
, sizeof (ScsiCmd
->Cdb
));
2278 if (Packet
->CdbLength
> 16) {
2279 Header
->Length
= NTOHS ((UINT16
) (Packet
->CdbLength
- 15));
2280 Header
->Type
= ISCSI_AHS_TYPE_EXT_CDB
;
2282 CopyMem (Header
+ 1, (UINT8
*) Packet
->Cdb
+ 16, Packet
->CdbLength
- 16);
2286 Session
= Tcb
->Conn
->Session
;
2287 ImmediateDataLen
= 0;
2289 if (Session
->ImmediateData
&& (Packet
->OutTransferLength
!= 0)) {
2291 // Send immediate data in this SCSI Command PDU. The length of the immeidate
2292 // data is the minimum of FirstBurstLength, the data length to be xfered, and
2293 // the MaxRecvdataSegmentLength on this connection.
2295 ImmediateDataLen
= MIN (Session
->FirstBurstLength
, Packet
->OutTransferLength
);
2296 ImmediateDataLen
= MIN (ImmediateDataLen
, Tcb
->Conn
->MaxRecvDataSegmentLength
);
2299 // Update the data segment length in the PDU header.
2301 ISCSI_SET_DATASEG_LEN (ScsiCmd
, ImmediateDataLen
);
2304 // Create the data segment.
2306 DataSeg
= IScsiNewDataSegment ((UINT8
*) Packet
->OutDataBuffer
, ImmediateDataLen
, FALSE
);
2307 if (DataSeg
== NULL
) {
2308 NetbufFree (PduHeader
);
2313 NbufList
= AllocatePool (sizeof (LIST_ENTRY
));
2314 if (NbufList
== NULL
) {
2315 NetbufFree (PduHeader
);
2316 NetbufFree (DataSeg
);
2322 InitializeListHead (NbufList
);
2323 InsertTailList (NbufList
, &PduHeader
->List
);
2324 InsertTailList (NbufList
, &DataSeg
->List
);
2326 Pdu
= NetbufFromBufList (NbufList
, 0, 0, IScsiFreeNbufList
, NbufList
);
2328 IScsiFreeNbufList (NbufList
);
2332 if (Session
->InitialR2T
||
2333 (ImmediateDataLen
== Session
->FirstBurstLength
) ||
2334 (ImmediateDataLen
== Packet
->OutTransferLength
)
2337 // Unsolicited data out sequence is not allowed,
2338 // or FirstBustLength data is already sent out by immediate data,
2339 // or all the OUT data accompany this SCSI packet are sent as
2340 // immediate data. The final flag should be set on this SCSI Command
2343 ISCSI_SET_FLAG (ScsiCmd
, ISCSI_BHS_FLAG_FINAL
);
2353 Create a new iSCSI SCSI Data Out PDU.
2355 @param[in] Data The data to put into the Data Out PDU.
2356 @param[in] Len Length of the data.
2357 @param[in] DataSN The DataSN of the Data Out PDU.
2358 @param[in] Tcb The task control block of this Data Out PDU.
2359 @param[in] Lun The LUN.
2361 @return The net buffer wrapping the Data Out PDU.
2362 @retval NULL Other errors as indicated.
2366 IScsiNewDataOutPdu (
2374 LIST_ENTRY
*NbufList
;
2378 ISCSI_SCSI_DATA_OUT
*DataOutHdr
;
2379 ISCSI_XFER_CONTEXT
*XferContext
;
2381 NbufList
= AllocatePool (sizeof (LIST_ENTRY
));
2382 if (NbufList
== NULL
) {
2386 InitializeListHead (NbufList
);
2389 // Allocate memory for the BHS.
2391 PduHdr
= NetbufAlloc (sizeof (ISCSI_SCSI_DATA_OUT
));
2392 if (PduHdr
== NULL
) {
2393 FreePool (NbufList
);
2397 // Insert the BHS into the buffer list.
2399 InsertTailList (NbufList
, &PduHdr
->List
);
2401 DataOutHdr
= (ISCSI_SCSI_DATA_OUT
*) NetbufAllocSpace (PduHdr
, sizeof (ISCSI_SCSI_DATA_OUT
), NET_BUF_TAIL
);
2402 if (DataOutHdr
== NULL
) {
2403 IScsiFreeNbufList (NbufList
);
2406 XferContext
= &Tcb
->XferContext
;
2408 ZeroMem (DataOutHdr
, sizeof (ISCSI_SCSI_DATA_OUT
));
2411 // Set the flags and fields of the Data Out PDU BHS.
2413 ISCSI_SET_OPCODE (DataOutHdr
, ISCSI_OPCODE_SCSI_DATA_OUT
, 0);
2414 ISCSI_SET_DATASEG_LEN (DataOutHdr
, Len
);
2416 DataOutHdr
->InitiatorTaskTag
= HTONL (Tcb
->InitiatorTaskTag
);
2417 DataOutHdr
->TargetTransferTag
= HTONL (XferContext
->TargetTransferTag
);
2418 DataOutHdr
->ExpStatSN
= HTONL (Tcb
->Conn
->ExpStatSN
);
2419 DataOutHdr
->DataSN
= HTONL (DataSN
);
2420 DataOutHdr
->BufferOffset
= HTONL (XferContext
->Offset
);
2422 if (XferContext
->TargetTransferTag
!= ISCSI_RESERVED_TAG
) {
2423 CopyMem (&DataOutHdr
->Lun
, &Lun
, sizeof (DataOutHdr
->Lun
));
2426 // Build the data segment for this Data Out PDU.
2428 DataSeg
= IScsiNewDataSegment (Data
, Len
, FALSE
);
2429 if (DataSeg
== NULL
) {
2430 IScsiFreeNbufList (NbufList
);
2434 // Put the data segment into the buffer list and combine it with the BHS
2435 // into a full Data Out PDU.
2437 InsertTailList (NbufList
, &DataSeg
->List
);
2438 Pdu
= NetbufFromBufList (NbufList
, 0, 0, IScsiFreeNbufList
, NbufList
);
2440 IScsiFreeNbufList (NbufList
);
2448 Generate a consecutive sequence of iSCSI SCSI Data Out PDUs.
2450 @param[in] Data The data which will be carried by the sequence of iSCSI SCSI Data Out PDUs.
2451 @param[in] Tcb The task control block of the data to send out.
2452 @param[in] Lun The LUN the data will be sent to.
2454 @return A list of net buffers with each of them wrapping an iSCSI SCSI Data Out PDU.
2455 @retval NULL Other errors as indicated.
2459 IScsiGenerateDataOutPduSequence (
2465 LIST_ENTRY
*PduList
;
2468 NET_BUF
*DataOutPdu
;
2469 ISCSI_CONNECTION
*Conn
;
2470 ISCSI_XFER_CONTEXT
*XferContext
;
2471 UINT8
*DataOutPacket
;
2473 PduList
= AllocatePool (sizeof (LIST_ENTRY
));
2474 if (PduList
== NULL
) {
2478 InitializeListHead (PduList
);
2483 XferContext
= &Tcb
->XferContext
;
2485 while (XferContext
->DesiredLength
> 0) {
2487 // Determine the length of data this Data Out PDU can carry.
2489 DataLen
= MIN (XferContext
->DesiredLength
, Conn
->MaxRecvDataSegmentLength
);
2492 // Create a Data Out PDU.
2494 DataOutPdu
= IScsiNewDataOutPdu (Data
, DataLen
, DataSN
, Tcb
, Lun
);
2495 if (DataOutPdu
== NULL
) {
2496 IScsiFreeNbufList (PduList
);
2502 InsertTailList (PduList
, &DataOutPdu
->List
);
2505 // Update the context and DataSN.
2508 XferContext
->Offset
+= DataLen
;
2509 XferContext
->DesiredLength
-= DataLen
;
2513 // Set the F bit for the last data out PDU in this sequence.
2515 DataOutPacket
= NetbufGetByte (DataOutPdu
, 0, NULL
);
2516 if (DataOutPacket
== NULL
) {
2517 IScsiFreeNbufList (PduList
);
2522 ISCSI_SET_FLAG (DataOutPacket
, ISCSI_BHS_FLAG_FINAL
);
2530 Send the Data in a sequence of Data Out PDUs one by one.
2532 @param[in] Data The data to carry by Data Out PDUs.
2533 @param[in] Lun The LUN the data will be sent to.
2534 @param[in] Tcb The task control block.
2536 @retval EFI_SUCCES The data is sent out to the LUN.
2537 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
2538 @retval Others Other errors as indicated.
2542 IScsiSendDataOutPduSequence (
2548 LIST_ENTRY
*DataOutPduList
;
2554 // Generate the Data Out PDU sequence.
2556 DataOutPduList
= IScsiGenerateDataOutPduSequence (Data
, Tcb
, Lun
);
2557 if (DataOutPduList
== NULL
) {
2558 return EFI_OUT_OF_RESOURCES
;
2561 Status
= EFI_SUCCESS
;
2564 // Send the Data Out PDU's one by one.
2566 NET_LIST_FOR_EACH (Entry
, DataOutPduList
) {
2567 Pdu
= NET_LIST_USER_STRUCT (Entry
, NET_BUF
, List
);
2569 Status
= TcpIoTransmit (&Tcb
->Conn
->TcpIo
, Pdu
);
2571 if (EFI_ERROR (Status
)) {
2576 IScsiFreeNbufList (DataOutPduList
);
2583 Process the received iSCSI SCSI Data In PDU.
2585 @param[in] Pdu The Data In PDU received.
2586 @param[in] Tcb The task control block.
2587 @param[in, out] Packet The EXT SCSI PASS THRU request packet.
2589 @retval EFI_SUCCES The check on the Data IN PDU is passed and some update
2591 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol errror occurred.
2592 @retval EFI_BAD_BUFFER_SIZEE The buffer was not the proper size for the request.
2593 @retval Others Other errors as indicated.
2600 IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET
*Packet
2603 ISCSI_SCSI_DATA_IN
*DataInHdr
;
2606 DataInHdr
= (ISCSI_SCSI_DATA_IN
*) NetbufGetByte (Pdu
, 0, NULL
);
2607 if (DataInHdr
== NULL
) {
2608 return EFI_PROTOCOL_ERROR
;
2611 DataInHdr
->InitiatorTaskTag
= NTOHL (DataInHdr
->InitiatorTaskTag
);
2612 DataInHdr
->ExpCmdSN
= NTOHL (DataInHdr
->ExpCmdSN
);
2613 DataInHdr
->MaxCmdSN
= NTOHL (DataInHdr
->MaxCmdSN
);
2614 DataInHdr
->DataSN
= NTOHL (DataInHdr
->DataSN
);
2617 // Check the DataSN.
2619 Status
= IScsiCheckSN (&Tcb
->ExpDataSN
, DataInHdr
->DataSN
);
2620 if (EFI_ERROR (Status
)) {
2624 if (DataInHdr
->InitiatorTaskTag
!= Tcb
->InitiatorTaskTag
) {
2625 return EFI_PROTOCOL_ERROR
;
2628 // Update the command related sequence numbers.
2630 IScsiUpdateCmdSN (Tcb
->Conn
->Session
, DataInHdr
->MaxCmdSN
, DataInHdr
->ExpCmdSN
);
2632 if (ISCSI_FLAG_ON (DataInHdr
, SCSI_DATA_IN_PDU_FLAG_STATUS_VALID
)) {
2633 if (!ISCSI_FLAG_ON (DataInHdr
, ISCSI_BHS_FLAG_FINAL
)) {
2635 // The S bit is on but the F bit is off.
2637 return EFI_PROTOCOL_ERROR
;
2640 Tcb
->StatusXferd
= TRUE
;
2642 if (ISCSI_FLAG_ON (DataInHdr
, SCSI_DATA_IN_PDU_FLAG_OVERFLOW
| SCSI_DATA_IN_PDU_FLAG_UNDERFLOW
)) {
2644 // Underflow and Overflow are mutual flags.
2646 return EFI_PROTOCOL_ERROR
;
2649 // S bit is on, the StatSN is valid.
2651 Status
= IScsiCheckSN (&Tcb
->Conn
->ExpStatSN
, NTOHL (DataInHdr
->StatSN
));
2652 if (EFI_ERROR (Status
)) {
2656 Packet
->HostAdapterStatus
= 0;
2657 Packet
->TargetStatus
= DataInHdr
->Status
;
2659 if (ISCSI_FLAG_ON (DataInHdr
, SCSI_RSP_PDU_FLAG_OVERFLOW
)) {
2660 Packet
->InTransferLength
+= NTOHL (DataInHdr
->ResidualCount
);
2661 Status
= EFI_BAD_BUFFER_SIZE
;
2664 if (ISCSI_FLAG_ON (DataInHdr
, SCSI_RSP_PDU_FLAG_UNDERFLOW
)) {
2665 Packet
->InTransferLength
-= NTOHL (DataInHdr
->ResidualCount
);
2674 Process the received iSCSI R2T PDU.
2676 @param[in] Pdu The R2T PDU received.
2677 @param[in] Tcb The task control block.
2678 @param[in] Lun The Lun.
2679 @param[in, out] Packet The EXT SCSI PASS THRU request packet.
2681 @retval EFI_SUCCES The R2T PDU is valid and the solicited data is sent out.
2682 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol errror occurred.
2683 @retval Others Other errors as indicated.
2691 IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET
*Packet
2694 ISCSI_READY_TO_TRANSFER
*R2THdr
;
2696 ISCSI_XFER_CONTEXT
*XferContext
;
2699 R2THdr
= (ISCSI_READY_TO_TRANSFER
*) NetbufGetByte (Pdu
, 0, NULL
);
2700 if (R2THdr
== NULL
) {
2701 return EFI_PROTOCOL_ERROR
;
2704 R2THdr
->InitiatorTaskTag
= NTOHL (R2THdr
->InitiatorTaskTag
);
2705 R2THdr
->TargetTransferTag
= NTOHL (R2THdr
->TargetTransferTag
);
2706 R2THdr
->StatSN
= NTOHL (R2THdr
->StatSN
);
2707 R2THdr
->R2TSeqNum
= NTOHL (R2THdr
->R2TSeqNum
);
2708 R2THdr
->BufferOffset
= NTOHL (R2THdr
->BufferOffset
);
2709 R2THdr
->DesiredDataTransferLength
= NTOHL (R2THdr
->DesiredDataTransferLength
);
2711 if ((R2THdr
->InitiatorTaskTag
!= Tcb
->InitiatorTaskTag
) || !ISCSI_SEQ_EQ (R2THdr
->StatSN
, Tcb
->Conn
->ExpStatSN
)) {
2712 return EFI_PROTOCOL_ERROR
;;
2715 // Check the sequence number.
2717 Status
= IScsiCheckSN (&Tcb
->ExpDataSN
, R2THdr
->R2TSeqNum
);
2718 if (EFI_ERROR (Status
)) {
2722 XferContext
= &Tcb
->XferContext
;
2723 XferContext
->TargetTransferTag
= R2THdr
->TargetTransferTag
;
2724 XferContext
->Offset
= R2THdr
->BufferOffset
;
2725 XferContext
->DesiredLength
= R2THdr
->DesiredDataTransferLength
;
2727 if (((XferContext
->Offset
+ XferContext
->DesiredLength
) > Packet
->OutTransferLength
) ||
2728 (XferContext
->DesiredLength
> Tcb
->Conn
->Session
->MaxBurstLength
)
2730 return EFI_PROTOCOL_ERROR
;
2733 // Send the data solicited by this R2T.
2735 Data
= (UINT8
*) Packet
->OutDataBuffer
+ XferContext
->Offset
;
2736 Status
= IScsiSendDataOutPduSequence (Data
, Lun
, Tcb
);
2743 Process the received iSCSI SCSI Response PDU.
2745 @param[in] Pdu The Response PDU received.
2746 @param[in] Tcb The task control block.
2747 @param[in, out] Packet The EXT SCSI PASS THRU request packet.
2749 @retval EFI_SUCCES The Response PDU is processed.
2750 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol errror occurred.
2751 @retval EFI_BAD_BUFFER_SIZEE The buffer was not the proper size for the request.
2752 @retval Others Other errors as indicated.
2756 IScsiOnScsiRspRcvd (
2759 IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET
*Packet
2762 SCSI_RESPONSE
*ScsiRspHdr
;
2763 ISCSI_SENSE_DATA
*SenseData
;
2767 ScsiRspHdr
= (SCSI_RESPONSE
*) NetbufGetByte (Pdu
, 0, NULL
);
2768 if (ScsiRspHdr
== NULL
) {
2769 return EFI_PROTOCOL_ERROR
;
2772 ScsiRspHdr
->InitiatorTaskTag
= NTOHL (ScsiRspHdr
->InitiatorTaskTag
);
2773 if (ScsiRspHdr
->InitiatorTaskTag
!= Tcb
->InitiatorTaskTag
) {
2774 return EFI_PROTOCOL_ERROR
;
2777 ScsiRspHdr
->StatSN
= NTOHL (ScsiRspHdr
->StatSN
);
2779 Status
= IScsiCheckSN (&Tcb
->Conn
->ExpStatSN
, ScsiRspHdr
->StatSN
);
2780 if (EFI_ERROR (Status
)) {
2784 ScsiRspHdr
->MaxCmdSN
= NTOHL (ScsiRspHdr
->MaxCmdSN
);
2785 ScsiRspHdr
->ExpCmdSN
= NTOHL (ScsiRspHdr
->ExpCmdSN
);
2786 IScsiUpdateCmdSN (Tcb
->Conn
->Session
, ScsiRspHdr
->MaxCmdSN
, ScsiRspHdr
->ExpCmdSN
);
2788 Tcb
->StatusXferd
= TRUE
;
2790 Packet
->HostAdapterStatus
= ScsiRspHdr
->Response
;
2791 if (Packet
->HostAdapterStatus
!= ISCSI_SERVICE_RSP_COMMAND_COMPLETE_AT_TARGET
) {
2795 Packet
->TargetStatus
= ScsiRspHdr
->Status
;
2797 if (ISCSI_FLAG_ON (ScsiRspHdr
, SCSI_RSP_PDU_FLAG_BI_READ_OVERFLOW
| SCSI_RSP_PDU_FLAG_BI_READ_UNDERFLOW
) ||
2798 ISCSI_FLAG_ON (ScsiRspHdr
, SCSI_RSP_PDU_FLAG_OVERFLOW
| SCSI_RSP_PDU_FLAG_UNDERFLOW
)
2800 return EFI_PROTOCOL_ERROR
;
2803 if (ISCSI_FLAG_ON (ScsiRspHdr
, SCSI_RSP_PDU_FLAG_BI_READ_OVERFLOW
)) {
2804 Packet
->InTransferLength
+= NTOHL (ScsiRspHdr
->BiReadResidualCount
);
2805 Status
= EFI_BAD_BUFFER_SIZE
;
2808 if (ISCSI_FLAG_ON (ScsiRspHdr
, SCSI_RSP_PDU_FLAG_BI_READ_UNDERFLOW
)) {
2809 Packet
->InTransferLength
-= NTOHL (ScsiRspHdr
->BiReadResidualCount
);
2812 if (ISCSI_FLAG_ON (ScsiRspHdr
, SCSI_RSP_PDU_FLAG_OVERFLOW
)) {
2813 if (Packet
->DataDirection
== DataIn
) {
2814 Packet
->InTransferLength
+= NTOHL (ScsiRspHdr
->ResidualCount
);
2816 Packet
->OutTransferLength
+= NTOHL (ScsiRspHdr
->ResidualCount
);
2819 Status
= EFI_BAD_BUFFER_SIZE
;
2822 if (ISCSI_FLAG_ON (ScsiRspHdr
, SCSI_RSP_PDU_FLAG_UNDERFLOW
)) {
2823 if (Packet
->DataDirection
== DataIn
) {
2824 Packet
->InTransferLength
-= NTOHL (ScsiRspHdr
->ResidualCount
);
2826 Packet
->OutTransferLength
-= NTOHL (ScsiRspHdr
->ResidualCount
);
2830 DataSegLen
= ISCSI_GET_DATASEG_LEN (ScsiRspHdr
);
2831 if (DataSegLen
!= 0) {
2832 SenseData
= (ISCSI_SENSE_DATA
*) NetbufGetByte (Pdu
, sizeof (SCSI_RESPONSE
), NULL
);
2833 if (SenseData
== NULL
) {
2834 return EFI_PROTOCOL_ERROR
;
2837 SenseData
->Length
= NTOHS (SenseData
->Length
);
2839 Packet
->SenseDataLength
= (UINT8
) MIN (SenseData
->Length
, Packet
->SenseDataLength
);
2840 if (Packet
->SenseDataLength
!= 0) {
2841 CopyMem (Packet
->SenseData
, &SenseData
->Data
[0], Packet
->SenseDataLength
);
2844 Packet
->SenseDataLength
= 0;
2852 Process the received NOP In PDU.
2854 @param[in] Pdu The NOP In PDU received.
2855 @param[in] Tcb The task control block.
2857 @retval EFI_SUCCES The NOP In PDU is processed and the related sequence
2858 numbers are updated.
2859 @retval EFI_PROTOCOL_ERROR Some kind of iSCSI protocol errror occurred.
2868 ISCSI_NOP_IN
*NopInHdr
;
2871 NopInHdr
= (ISCSI_NOP_IN
*) NetbufGetByte (Pdu
, 0, NULL
);
2872 if (NopInHdr
== NULL
) {
2873 return EFI_PROTOCOL_ERROR
;
2876 NopInHdr
->StatSN
= NTOHL (NopInHdr
->StatSN
);
2877 NopInHdr
->ExpCmdSN
= NTOHL (NopInHdr
->ExpCmdSN
);
2878 NopInHdr
->MaxCmdSN
= NTOHL (NopInHdr
->MaxCmdSN
);
2880 if (NopInHdr
->InitiatorTaskTag
== ISCSI_RESERVED_TAG
) {
2881 if (NopInHdr
->StatSN
!= Tcb
->Conn
->ExpStatSN
) {
2882 return EFI_PROTOCOL_ERROR
;
2885 Status
= IScsiCheckSN (&Tcb
->Conn
->ExpStatSN
, NopInHdr
->StatSN
);
2886 if (EFI_ERROR (Status
)) {
2891 IScsiUpdateCmdSN (Tcb
->Conn
->Session
, NopInHdr
->MaxCmdSN
, NopInHdr
->ExpCmdSN
);
2898 Execute the SCSI command issued through the EXT SCSI PASS THRU protocol.
2900 @param[in] PassThru The EXT SCSI PASS THRU protocol.
2901 @param[in] Target The target ID.
2902 @param[in] Lun The LUN.
2903 @param[in, out] Packet The request packet containing IO request, SCSI command
2904 buffer and buffers to read/write.
2906 @retval EFI_SUCCES The SCSI command is executed and the result is updated to
2908 @retval EFI_DEVICE_ERROR Session state was not as required.
2909 @retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
2910 @retval EFI_PROTOCOL_ERROR There is no such data in the net buffer.
2911 @retval EFI_NOT_READY The target can not accept new commands.
2912 @retval Others Other errors as indicated.
2916 IScsiExecuteScsiCommand (
2917 IN EFI_EXT_SCSI_PASS_THRU_PROTOCOL
*PassThru
,
2920 IN OUT EFI_EXT_SCSI_PASS_THRU_SCSI_REQUEST_PACKET
*Packet
2924 ISCSI_DRIVER_DATA
*Private
;
2925 ISCSI_SESSION
*Session
;
2926 EFI_EVENT TimeoutEvent
;
2927 ISCSI_CONNECTION
*Conn
;
2930 ISCSI_XFER_CONTEXT
*XferContext
;
2932 ISCSI_IN_BUFFER_CONTEXT InBufferContext
;
2936 Private
= ISCSI_DRIVER_DATA_FROM_EXT_SCSI_PASS_THRU (PassThru
);
2937 Session
= Private
->Session
;
2938 Status
= EFI_SUCCESS
;
2940 TimeoutEvent
= NULL
;
2943 if (Session
->State
!= SESSION_STATE_LOGGED_IN
) {
2944 Status
= EFI_DEVICE_ERROR
;
2948 Conn
= NET_LIST_USER_STRUCT_S (
2949 Session
->Conns
.ForwardLink
,
2952 ISCSI_CONNECTION_SIGNATURE
2955 if (Packet
->Timeout
!= 0) {
2956 Timeout
= MultU64x32 (Packet
->Timeout
, 4);
2959 Status
= IScsiNewTcb (Conn
, &Tcb
);
2960 if (EFI_ERROR (Status
)) {
2964 // Encapsulate the SCSI request packet into an iSCSI SCSI Command PDU.
2966 Pdu
= IScsiNewScsiCmdPdu (Packet
, Lun
, Tcb
);
2968 Status
= EFI_OUT_OF_RESOURCES
;
2972 XferContext
= &Tcb
->XferContext
;
2973 PduHdr
= NetbufGetByte (Pdu
, 0, NULL
);
2974 if (PduHdr
== NULL
) {
2975 Status
= EFI_PROTOCOL_ERROR
;
2979 XferContext
->Offset
= ISCSI_GET_DATASEG_LEN (PduHdr
);
2982 // Transmit the SCSI Command PDU.
2984 Status
= TcpIoTransmit (&Conn
->TcpIo
, Pdu
);
2988 if (EFI_ERROR (Status
)) {
2992 if (!Session
->InitialR2T
&&
2993 (XferContext
->Offset
< Session
->FirstBurstLength
) &&
2994 (XferContext
->Offset
< Packet
->OutTransferLength
)
2997 // Unsolicited Data-Out sequence is allowed. There is remaining SCSI
2998 // OUT data, and the limit of FirstBurstLength is not reached.
3000 XferContext
->TargetTransferTag
= ISCSI_RESERVED_TAG
;
3001 XferContext
->DesiredLength
= MIN (
3002 Session
->FirstBurstLength
,
3003 Packet
->OutTransferLength
- XferContext
->Offset
3006 Data
= (UINT8
*) Packet
->OutDataBuffer
+ XferContext
->Offset
;
3007 Status
= IScsiSendDataOutPduSequence (Data
, Lun
, Tcb
);
3008 if (EFI_ERROR (Status
)) {
3013 InBufferContext
.InData
= (UINT8
*) Packet
->InDataBuffer
;
3014 InBufferContext
.InDataLen
= Packet
->InTransferLength
;
3016 while (!Tcb
->StatusXferd
) {
3018 // Start the timeout timer.
3021 Status
= gBS
->SetTimer (Conn
->TimeoutEvent
, TimerRelative
, Timeout
);
3022 if (EFI_ERROR (Status
)) {
3026 TimeoutEvent
= Conn
->TimeoutEvent
;
3030 // Try to receive PDU from target.
3032 Status
= IScsiReceivePdu (Conn
, &Pdu
, &InBufferContext
, FALSE
, FALSE
, TimeoutEvent
);
3033 if (EFI_ERROR (Status
)) {
3037 PduHdr
= NetbufGetByte (Pdu
, 0, NULL
);
3038 if (PduHdr
== NULL
) {
3039 Status
= EFI_PROTOCOL_ERROR
;
3043 switch (ISCSI_GET_OPCODE (PduHdr
)) {
3044 case ISCSI_OPCODE_SCSI_DATA_IN
:
3045 Status
= IScsiOnDataInRcvd (Pdu
, Tcb
, Packet
);
3048 case ISCSI_OPCODE_R2T
:
3049 Status
= IScsiOnR2TRcvd (Pdu
, Tcb
, Lun
, Packet
);
3052 case ISCSI_OPCODE_SCSI_RSP
:
3053 Status
= IScsiOnScsiRspRcvd (Pdu
, Tcb
, Packet
);
3056 case ISCSI_OPCODE_NOP_IN
:
3057 Status
= IScsiOnNopInRcvd (Pdu
, Tcb
);
3060 case ISCSI_OPCODE_VENDOR_T0
:
3061 case ISCSI_OPCODE_VENDOR_T1
:
3062 case ISCSI_OPCODE_VENDOR_T2
:
3064 // These messages are vendor specific. Skip them.
3069 Status
= EFI_PROTOCOL_ERROR
;
3075 if (EFI_ERROR (Status
)) {
3082 if (TimeoutEvent
!= NULL
) {
3083 gBS
->SetTimer (TimeoutEvent
, TimerCancel
, 0);
3095 Reinstate the session on some error.
3097 @param[in] Session The iSCSI session
3099 @retval EFI_SUCCESS The session is reinstated from some error.
3100 @retval Other Reinstatement failed.
3104 IScsiSessionReinstatement (
3105 IN ISCSI_SESSION
*Session
3110 ASSERT (Session
->State
!= SESSION_STATE_FREE
);
3113 // Abort the session and re-init it.
3115 IScsiSessionAbort (Session
);
3116 IScsiSessionInit (Session
, TRUE
);
3121 Status
= IScsiSessionLogin (Session
);
3128 Initialize some session parameters before login.
3130 @param[in, out] Session The iSCSI session.
3131 @param[in] Recovery Whether the request is from a fresh new start or recovery.
3136 IN OUT ISCSI_SESSION
*Session
,
3141 Session
->Signature
= ISCSI_SESSION_SIGNATURE
;
3142 Session
->State
= SESSION_STATE_FREE
;
3144 InitializeListHead (&Session
->Conns
);
3145 InitializeListHead (&Session
->TcbList
);
3151 Session
->InitiatorTaskTag
= 1;
3152 Session
->NextCid
= 1;
3154 Session
->TargetPortalGroupTag
= 0;
3155 Session
->MaxConnections
= ISCSI_MAX_CONNS_PER_SESSION
;
3156 Session
->InitialR2T
= FALSE
;
3157 Session
->ImmediateData
= TRUE
;
3158 Session
->MaxBurstLength
= 262144;
3159 Session
->FirstBurstLength
= MAX_RECV_DATA_SEG_LEN_IN_FFP
;
3160 Session
->DefaultTime2Wait
= 2;
3161 Session
->DefaultTime2Retain
= 20;
3162 Session
->MaxOutstandingR2T
= DEFAULT_MAX_OUTSTANDING_R2T
;
3163 Session
->DataPDUInOrder
= TRUE
;
3164 Session
->DataSequenceInOrder
= TRUE
;
3165 Session
->ErrorRecoveryLevel
= 0;
3170 Abort the iSCSI session. That is, reset all the connection(s), and free the
3173 @param[in, out] Session The iSCSI session.
3178 IN OUT ISCSI_SESSION
*Session
3181 ISCSI_CONNECTION
*Conn
;
3182 EFI_GUID
*ProtocolGuid
;
3184 if (Session
->State
!= SESSION_STATE_LOGGED_IN
) {
3188 ASSERT (!IsListEmpty (&Session
->Conns
));
3190 while (!IsListEmpty (&Session
->Conns
)) {
3191 Conn
= NET_LIST_USER_STRUCT_S (
3192 Session
->Conns
.ForwardLink
,
3195 ISCSI_CONNECTION_SIGNATURE
3197 if (!Conn
->Ipv6Flag
) {
3198 ProtocolGuid
= &gEfiTcp4ProtocolGuid
;
3200 ProtocolGuid
= &gEfiTcp6ProtocolGuid
;
3203 gBS
->CloseProtocol (
3206 Session
->Private
->Image
,
3207 Session
->Private
->ExtScsiPassThruHandle
3210 IScsiConnReset (Conn
);
3212 IScsiDetatchConnection (Conn
);
3213 IScsiDestroyConnection (Conn
);
3216 Session
->State
= SESSION_STATE_FAILED
;