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| author |   Sagi Grimberg <sagi@grimberg.me> | 2017-10-24 15:25:21 +0300 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2017-11-20 08:28:35 +0100 |
| commit | 9e0ed16ab9a9aaf670b81c9cd05b5e50defed654 (patch) | |
| tree | 596c6fcd7c046a2c4f51913f9b1701edc76e9a3f /drivers/nvme | |
| parent | nvme-fabrics: introduce init command check for a queue that is not alive (diff) | |
| download | linux-dev-9e0ed16ab9a9aaf670b81c9cd05b5e50defed654.tar.xz linux-dev-9e0ed16ab9a9aaf670b81c9cd05b5e50defed654.zip | |
nvme-fc: check if queue is ready in queue_rq
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>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/fc.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index 7ab0be55c7d0..e0577bf33f45 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -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 * |