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| author |   Sagi Grimberg <sagi@grimberg.me> | 2017-10-24 15:25:22 +0300 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2017-11-20 08:28:36 +0100 |
| commit | 9d7fab04b95e8c26014a9bfc1c943b8360b44c17 (patch) | |
| tree | e3724bf21fa48b057b4c34eb95eed46eac33d035 /drivers/nvme | |
| parent | nvme-fc: check if queue is ready in queue_rq (diff) | |
| download | linux-dev-9d7fab04b95e8c26014a9bfc1c943b8360b44c17.tar.xz linux-dev-9d7fab04b95e8c26014a9bfc1c943b8360b44c17.zip | |
nvme-loop: 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_LOOP_Q_LIVE which is set after nvmf connect
and cleared in queue teardown.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/loop.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c index 96d390416789..1e21b286f299 100644 --- a/drivers/nvme/target/loop.c +++ b/drivers/nvme/target/loop.c @@ -52,10 +52,15 @@ static inline struct nvme_loop_ctrl *to_loop_ctrl(struct nvme_ctrl *ctrl) return container_of(ctrl, struct nvme_loop_ctrl, ctrl); } +enum nvme_loop_queue_flags { + NVME_LOOP_Q_LIVE = 0, +}; + struct nvme_loop_queue { struct nvmet_cq nvme_cq; struct nvmet_sq nvme_sq; struct nvme_loop_ctrl *ctrl; + unsigned long flags; }; static struct nvmet_port *nvmet_loop_port; @@ -144,6 +149,14 @@ nvme_loop_timeout(struct request *rq, bool reserved) return BLK_EH_HANDLED; } +static inline blk_status_t nvme_loop_is_ready(struct nvme_loop_queue *queue, + struct request *rq) +{ + if (unlikely(!test_bit(NVME_LOOP_Q_LIVE, &queue->flags))) + return nvmf_check_init_req(&queue->ctrl->ctrl, rq); + return BLK_STS_OK; +} + static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { @@ -153,6 +166,10 @@ static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx, struct nvme_loop_iod *iod = blk_mq_rq_to_pdu(req); blk_status_t ret; + ret = nvme_loop_is_ready(queue, req); + if (unlikely(ret)) + return ret; + ret = nvme_setup_cmd(ns, req, &iod->cmd); if (ret) return ret; @@ -267,6 +284,7 @@ static const struct blk_mq_ops nvme_loop_admin_mq_ops = { static void nvme_loop_destroy_admin_queue(struct nvme_loop_ctrl *ctrl) { + clear_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[0].flags); nvmet_sq_destroy(&ctrl->queues[0].nvme_sq); blk_cleanup_queue(ctrl->ctrl.admin_q); blk_mq_free_tag_set(&ctrl->admin_tag_set); @@ -297,8 +315,10 @@ static void nvme_loop_destroy_io_queues(struct nvme_loop_ctrl *ctrl) { int i; - for (i = 1; i < ctrl->ctrl.queue_count; i++) + for (i = 1; i < ctrl->ctrl.queue_count; i++) { + clear_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[i].flags); nvmet_sq_destroy(&ctrl->queues[i].nvme_sq); + } } static int nvme_loop_init_io_queues(struct nvme_loop_ctrl *ctrl) @@ -338,6 +358,7 @@ static int nvme_loop_connect_io_queues(struct nvme_loop_ctrl *ctrl) ret = nvmf_connect_io_queue(&ctrl->ctrl, i); if (ret) return ret; + set_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[i].flags); } return 0; @@ -380,6 +401,8 @@ static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl) if (error) goto out_cleanup_queue; + set_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[0].flags); + error = nvmf_reg_read64(&ctrl->ctrl, NVME_REG_CAP, &ctrl->ctrl.cap); if (error) { dev_err(ctrl->ctrl.device, |