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iscsi-target: Add login_keys_workaround attribute for non RFC initiators
This patch re-introduces part of a long standing login workaround that was recently dropped by: commit 1c99de9 Author: Nicholas Bellinger <[email protected]> Date: Sun Apr 2 13:36:44 2017 -0700 iscsi-target: Drop work-around for legacy GlobalSAN initiator Namely, the workaround for FirstBurstLength ended up being required by Mellanox Flexboot PXE boot ROMs as reported by Robert. So this patch re-adds the work-around for FirstBurstLength within iscsi_check_proposer_for_optional_reply(), and makes the key optional to respond when the initiator does not propose, nor respond to it. Also as requested by Arun, this patch introduces a new TPG attribute named 'login_keys_workaround' that controls the use of both the FirstBurstLength workaround, as well as the two other existing workarounds for gPXE iSCSI boot client. By default, the workaround is enabled with login_keys_workaround=1, since Mellanox FlexBoot requires it, and Arun has verified the Qlogic MSFT initiator already proposes FirstBurstLength, so it's uneffected by this re-adding this part of the original work-around. Reported-by: Robert LeBlanc <[email protected]> Cc: Robert LeBlanc <[email protected]> Reviewed-by: Arun Easi <[email protected]> Cc: <[email protected]> # 3.1+ Signed-off-by: Nicholas Bellinger <[email protected]>
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