wimaxing 2008-6-29 21:17
RFC5046-Internet Small Computer System Interface (iSCSI) Extensions
【资料成文时间】： 2007
【语言】：英文
【页数】：85
【何人（公司）所著】：
【文件格式】： PDF
【文件原名】：Internet Small Computer System Interface (iSCSI) Extensions for Remote Direct Memory Access (RDMA)
【摘要或目录】：
Table of Contents
1. Introduction ....................................................5
1.1. Motivation .................................................5
1.2. Architectural Goals ........................................6
1.3. Protocol Overview ..........................................7
1.4. RDMA Services and iSER .....................................8
1.4.1. STag ................................................8
1.4.2. Send ................................................9
1.4.3. RDMA Write ..........................................9
1.4.4. RDMA Read ...........................................9
1.5. SCSI Read Overview ........................................10
1.6. SCSI Write Overview .......................................10
1.7. iSCSI/iSER Layering .......................................10
2. Definitions and Acronyms .......................................11
2.1. Definitions ...............................................11
2.2. Acronyms ..................................................17
2.3. Conventions ...............................................19
3. Upper Layer Interface Requirements .............................19
3.1. Operational Primitives Offered by iSER ....................20
3.1.1. Send_Control .......................................20
3.1.2. Put_Data ...........................................20
3.1.3. Get_Data ...........................................21
3.1.4. Allocate_Connection_Resources ......................21
3.1.5. Deallocate_Connection_Resources ....................22
3.1.6. Enable_Datamover ...................................22
3.1.7. Connection_Terminate ...............................22
3.1.8. Notice_Key_Values ..................................23
3.1.9. Deallocate_Task_Resources ..........................23
3.2. Operational Primitives Used by iSER .......................23
3.2.1. Control_Notify .....................................24
3.2.2. Data_Completion_Notify .............................24
3.2.3. Data_ACK_Notify ....................................24
3.2.4. Connection_Terminate_Notify ........................25
3.3. iSCSI Protocol Usage Requirements .........................25
4. Lower Layer Interface Requirements .............................26
4.1. Interactions with the RCaP Layer ..........................26
4.2. Interactions with the Transport Layer .....................27
5. Connection Setup and Termination ...............................27
5.1. iSCSI/iSER Connection Setup ...............................27
5.1.1. Initiator Behavior .................................29
5.1.2. Target Behavior ....................................30
5.1.3. iSER Hello Exchange ................................32
5.2. iSCSI/iSER Connection Termination .........................33
5.2.1. Normal Connection Termination at the Initiator .....33
5.2.2. Normal Connection Termination at the Target ........34
5.2.3. Termination without Logout Request/Response PDUs ...34
6. Login/Text Operational Keys ....................................35
6.1. HeaderDigest and DataDigest ...............................35
6.2. MaxRecvDataSegmentLength ..................................36
6.3. RDMAExtensions ............................................36
6.4. TargetRecvDataSegmentLength ...............................37
6.5. InitiatorRecvDataSegmentLength ............................38
6.6. OFMarker and IFMarker .....................................38
6.7. MaxOutstandingUnexpectedPDUs ..............................38
7. iSCSI PDU Considerations .......................................39
7.1. iSCSI Data-Type PDU .......................................39
7.2. iSCSI Control-Type PDU ....................................40
7.3. iSCSI PDUs ................................................40
7.3.1. SCSI Command .......................................40
7.3.2. SCSI Response ......................................42
7.3.3. Task Management Function Request/Response ..........44
7.3.4. SCSI Data-Out ......................................45
7.3.5. SCSI Data-In .......................................46
7.3.6. Ready to Transfer (R2T) ............................48
7.3.7. Asynchronous Message ...............................50
7.3.8. Text Request and Text Response .....................50
7.3.9. Login Request and Login Response ...................50
7.3.10. Logout Request and Logout Response ................51
7.3.11. SNACK Request .....................................51
7.3.12. Reject ............................................51
7.3.13. NOP-Out and NOP-In ................................51
8. Flow Control and STag Management ...............................52
8.1. Flow Control for RDMA Send Message Types ..................52
8.1.1. Flow Control for Control-Type PDUs from the
Initiator ..........................................52
8.1.2. Flow Control for Control-Type PDUs from the
Target .............................................55
8.2. Flow Control for RDMA Read Resources ......................56
8.3. STag Management ...........................................56
8.3.1. Allocation of STags ................................57
8.3.2. Invalidation of STags ..............................57
9. iSER Control and Data Transfer .................................58
9.1. iSER Header Format ........................................58
9.2. iSER Header Format for the iSCSI Control-Type PDU .........59
9.3. iSER Header Format for the iSER Hello Message .............60
9.4. iSER Header Format for the iSER HelloReply Message ........61
9.5. SCSI Data Transfer Operations .............................62
9.5.1. SCSI Write Operation ...............................62
9.5.2. SCSI Read Operation ................................63
9.5.3. Bidirectional Operation ............................64
10. iSER Error Handling and Recovery ..............................64
10.1. Error Handling ...........................................64
10.1.1. Errors in the Transport Layer .....................64
10.1.2. Errors in the RCaP Layer ..........................65
10.1.3. Errors in the iSER Layer ..........................66
10.1.4. Errors in the iSCSI Layer .........................67
10.2. Error Recovery ...........................................69
10.2.1. PDU Recovery ......................................69
10.2.2. Connection Recovery ...............................70
11. Security Considerations .......................................71
12. References ....................................................71
12.1. Normative References .....................................71
12.2. Informative References ...................................72
Appendix A. iWARP Message Format for iSER .........................73
A.1. iWARP Message Format for iSER Hello Message ...............73
A.2. iWARP Message Format for iSER HelloReply Message ..........74
A.3. iWARP Message Format for SCSI Read Command PDU ............75
A.4. iWARP Message Format for SCSI Read Data ...................76
A.5. iWARP Message Format for SCSI Write Command PDU ...........77
A.6. iWARP Message Format for RDMA Read Request ................78
A.7. iWARP Message Format for Solicited SCSI Write Data ........79
A.8. iWARP Message Format for SCSI Response PDU ................80
Appendix B. Architectural Discussion of iSER over InfiniBand ......81
B.1. The Host Side of the iSCSI and iSER Connections
in InfiniBand .............................................81
B.2. The Storage Side of the iSCSI and iSER Mixed
Network Environment .......................................82
B.3. Discovery Processes for an InfiniBand Host ................82
B.4. IBTA Connection Specifications ............................83
Acknowledgments ...................................................83