[SCSI] libiscsi: allow drivers to modify the itt sent to the target
bnx2i and cxgb3i need to encode LLD info in the itt so that the firmware/hardware can process the pdu. This patch allows the LLDs to encode info in the task->hdr->itt that they setup in the alloc_pdu callout (any resources that are allocated can be freed with the pdu in the cleanup_task callout). If the LLD encodes info in the itt they should implement a parse_pdu_itt callout. If parse_pdu_itt is not implemented libiscsi will do the right thing for the LLD. Signed-off-by: NMike Christie <michaelc@cs.wisc.edu> Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>
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