[PATCH for-4.12-rc] nvme-rdma: fast fail incoming requests while we reconnect

[Sagi Grimberg]

>>> +static inline int nvme_rdma_queue_is_ready(struct nvme_rdma_queue *queue,
>>>   		struct request *rq)
>>>   {
>>>   	if (unlikely(!test_bit(NVME_RDMA_Q_LIVE, &queue->flags))) {
>>> @@ -1441,11 +1443,22 @@ static inline bool nvme_rdma_queue_is_ready(struct nvme_rdma_queue *queue,
>>>
>>>   		if (!blk_rq_is_passthrough(rq) ||
>>>   		    cmd->common.opcode != nvme_fabrics_command ||
>>> -		    cmd->fabrics.fctype != nvme_fabrics_type_connect)
>>> -			return false;
>>> +		    cmd->fabrics.fctype != nvme_fabrics_type_connect) {
>>> +			/*
>>> +			 * reconnecting state means transport disruption, which
>>> +			 * can take a long time and even might fail permanently,
>>> +			 * so we can't let incoming I/O be requeued forever.
>>> +			 * fail it fast to allow upper layers a chance to
>>> +			 * failover.
>>> +			 */
>>> +			if (queue->ctrl->ctrl->state == NVME_CTRL_RECONNECTING)
>>
>> Sagi/Christoph,
>> It should be queue->ctrl->ctrl.state.
>>
>> we are testing this patch also now.
> 
> I've fixed this up already.  Especially as the earlier version got it
> right :)

Baa how did that sneak in....

Sorry, thanks Max & Christoph!