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nvme-fc: check if queue is ready in queue_rq

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In case the queue is not LIVE (fully functional and connected at the nvmf
level), we cannot allow any commands other than connect to pass through.

Add a new queue state flag NVME_FC_Q_LIVE which is set after nvmf connect
and cleared in queue teardown.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2017-10-24 15:25:21 +03:00 committed by Christoph Hellwig
parent 48832f8d58
commit 9e0ed16ab9
1 changed files with 18 additions and 1 deletions
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19
drivers/nvme/host/fc.c
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@ -32,6 +32,7 @@
enum nvme_fc_queue_flags {
NVME_FC_Q_CONNECTED = (1 << 0),
NVME_FC_Q_LIVE = (1 << 1),
};
#define NVMEFC_QUEUE_DELAY 3 /* ms units */
@ -1927,6 +1928,7 @@ nvme_fc_free_queue(struct nvme_fc_queue *queue)
if (!test_and_clear_bit(NVME_FC_Q_CONNECTED, &queue->flags))
return;
clear_bit(NVME_FC_Q_LIVE, &queue->flags);
/*
* Current implementation never disconnects a single queue.
* It always terminates a whole association. So there is never
@ -1934,7 +1936,6 @@ nvme_fc_free_queue(struct nvme_fc_queue *queue)
*/
queue->connection_id = 0;
clear_bit(NVME_FC_Q_CONNECTED, &queue->flags);
}
static void
@ -2013,6 +2014,8 @@ nvme_fc_connect_io_queues(struct nvme_fc_ctrl *ctrl, u16 qsize)
ret = nvmf_connect_io_queue(&ctrl->ctrl, i);
if (ret)
break;
set_bit(NVME_FC_Q_LIVE, &ctrl->queues[i].flags);
}
return ret;
@ -2320,6 +2323,14 @@ busy:
return BLK_STS_RESOURCE;
}
static inline blk_status_t nvme_fc_is_ready(struct nvme_fc_queue *queue,
struct request *rq)
{
if (unlikely(!test_bit(NVME_FC_Q_LIVE, &queue->flags)))
return nvmf_check_init_req(&queue->ctrl->ctrl, rq);
return BLK_STS_OK;
}
static blk_status_t
nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx,
const struct blk_mq_queue_data *bd)
@ -2335,6 +2346,10 @@ nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx,
u32 data_len;
blk_status_t ret;
ret = nvme_fc_is_ready(queue, rq);
if (unlikely(ret))
return ret;
ret = nvme_setup_cmd(ns, rq, sqe);
if (ret)
return ret;
@ -2727,6 +2742,8 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
if (ret)
goto out_disconnect_admin_queue;
set_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags);
/*
* Check controller capabilities
*