4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sagi Grimberg <s...@grimberg.me>
[ Upstream commit 9d7fab04b95e8c26014a9bfc1c943b8360b44c17 ]
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 <s...@grimberg.me>
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/target/loop.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -61,10 +61,15 @@ static inline struct nvme_loop_ctrl *to_
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;
@@ -153,6 +158,14 @@ nvme_loop_timeout(struct request *rq, bo
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)
{
@@ -162,6 +175,10 @@ static blk_status_t nvme_loop_queue_rq(s
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;
@@ -275,6 +292,7 @@ static const struct blk_mq_ops nvme_loop
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);
@@ -305,8 +323,10 @@ static void nvme_loop_destroy_io_queues(
{
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)
@@ -346,6 +366,7 @@ static int nvme_loop_connect_io_queues(s
ret = nvmf_connect_io_queue(&ctrl->ctrl, i);
if (ret)
return ret;
+ set_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[i].flags);
}
return 0;
@@ -387,6 +408,8 @@ static int nvme_loop_configure_admin_que
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,
