4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sagi Grimberg <s...@grimberg.me>
[ Upstream commit 9e0ed16ab9a9aaf670b81c9cd05b5e50defed654 ]
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 <s...@grimberg.me>
Reviewed-by: James Smart <james.sm...@broadcom.com>
Signed-off-by: Christoph Hellwig <h...@lst.de>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/nvme/host/fc.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -41,6 +41,7 @@
enum nvme_fc_queue_flags {
NVME_FC_Q_CONNECTED = (1 << 0),
+ NVME_FC_Q_LIVE = (1 << 1),
};
#define NVMEFC_QUEUE_DELAY 3 /* ms units */
@@ -1654,6 +1655,7 @@ nvme_fc_free_queue(struct nvme_fc_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
@@ -1661,7 +1663,6 @@ nvme_fc_free_queue(struct nvme_fc_queue
*/
queue->connection_id = 0;
- clear_bit(NVME_FC_Q_CONNECTED, &queue->flags);
}
static void
@@ -1740,6 +1741,8 @@ nvme_fc_connect_io_queues(struct nvme_fc
ret = nvmf_connect_io_queue(&ctrl->ctrl, i);
if (ret)
break;
+
+ set_bit(NVME_FC_Q_LIVE, &ctrl->queues[i].flags);
}
return ret;
@@ -2048,6 +2051,14 @@ 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)
@@ -2063,6 +2074,10 @@ nvme_fc_queue_rq(struct blk_mq_hw_ctx *h
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;
@@ -2398,6 +2413,8 @@ nvme_fc_create_association(struct nvme_f
if (ret)
goto out_disconnect_admin_queue;
+ set_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags);
+
/*
* Check controller capabilities
*
