发明授权
US08180928B2 Method and system for supporting read operations with CRC for iSCSI and iSCSI chimney
有权
支持iSCSI和iSCSI烟囱CRC读取操作的方法和系统
- 专利标题: Method and system for supporting read operations with CRC for iSCSI and iSCSI chimney
- 专利标题(中): 支持iSCSI和iSCSI烟囱CRC读取操作的方法和系统
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申请号: US11156206申请日: 2005-06-17
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公开(公告)号: US08180928B2公开(公告)日: 2012-05-15
- 发明人: Uri Elzur , Kan Frankie Fan , Scott McDaniel
- 申请人: Uri Elzur , Kan Frankie Fan , Scott McDaniel
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: Thomas, Kayden, Horstemeyer & Risley, LLP
- 主分类号: G06F3/00
- IPC分类号: G06F3/00
摘要:
Certain embodiments of the invention may be found in a method and system for performing SCSI read operations with a CRC via a TCP offload engine. Aspects of the method may comprise receiving an iSCSI read command from an initiator. Data may be fetched from a buffer based on the received iSCSI read command. The fetched data may be zero copied from the buffer to the initiator and a TCP sequence may be retransmitted to the initiator. A digest value may be calculated, which may be communicated to the initiator. An accumulated digest value stored in a temporary buffer may be utilized to calculate a final digest value, if the buffer is posted. The retransmitted TCP sequence may be processed and the fetched data may be zero copied into an iSCSI buffer, if the buffer is posted. The calculated final digest value may be communicated to the initiator.
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