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nvme-loop: 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_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>
This commit is contained in:
Sagi Grimberg 2017-10-24 15:25:22 +03:00 committed by Christoph Hellwig
parent 9e0ed16ab9
commit 9d7fab04b9
1 changed files with 24 additions and 1 deletions
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25
drivers/nvme/target/loop.c
View file

@ -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,