iser-target: Fix queue-full response handling

This patch addresses two queue-full handling bugs in iser-target.

The first is propagating isert_rdma_rw_ctx_post() return back
to target-core via isert_put_datain() + isert_get_dataout()
callbacks, in order to trigger queue-full logic in target-core.
Note target-core expects -EAGAIN or -ENOMEM error to signal
RDMA WRITE/READ data-transfer callbacks should be retried,
after queue-full logic been invoked.

Other types of errors propagated up from RDMA RW API will result
in target-core generating internal CHECK_CONDITION status,
avoiding subsequent isert_put_datain() and isert_get_dataout()
iscsit_transport callback retry attempts.

The second is to use transport_generic_request_failure()
during T10-PI hw-offload errors in isert_rdma_write_done()
and isert_rdma_read_done(), so CHECK_CONDITION queue-full
is handled internally by target-core.

Also add isert_put_response() T10-PI failure case fixme in
isert_rdma_write_done(), which is currently not internally
retried or released until session reinstatement.

Reported-by: Potnuri Bharat Teja <[email protected]>
Reviewed-by: Potnuri Bharat Teja <[email protected]>
Tested-by: Potnuri Bharat Teja <[email protected]>
Cc: Potnuri Bharat Teja <[email protected]>
Reported-by: Steve Wise <[email protected]>
Cc: Steve Wise <[email protected]>
Cc: Sagi Grimberg <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>

0 files changed, 0 insertions, 0 deletions