Digest error handling

["Amir Grimberg" <amir@iislf.com>]

Hi All,

This is regarding digest error handling.

 

It says in draft 9 section 6.5 (iSCSI error handling and recovery -> digest errors), that is the target receives a data PDU (solicited or unsolicited) with header digest, it must silently discard the PDU. My question is how can the target recover from this??

The problem is that there is no way to know the length of data payload after the header. Should the target receive from the TCP socket 48 bytes of PDU  header in loop , until the CRC check is executed successfully ???

If yes, what happens if the data payload length is not divided by 48 bytes (with no remainder) ? In this case, the CRC check will never be executed successfully.

 

Thanks,

Amir Grimberg