| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.12 020/127] nvme-fc: clear q_live at beginning of association teardown | Date | Mon, 24 May 2021 17:25:37 +0200 |
| |
From: James Smart <jsmart2021@gmail.com>
[ Upstream commit a7d139145a6640172516b193abf6d2398620aa14 ]
The __nvmf_check_ready() routine used to bounce all filesystem io if the controller state isn't LIVE. However, a later patch changed the logic so that it rejection ends up being based on the Q live check. The FC transport has a slightly different sequence from rdma and tcp for shutting down queues/marking them non-live. FC marks its queue non-live after aborting all ios and waiting for their termination, leaving a rather large window for filesystem io to continue to hit the transport. Unfortunately this resulted in filesystem I/O or applications seeing I/O errors.
Change the FC transport to mark the queues non-live at the first sign of teardown for the association (when I/O is initially terminated).
Fixes: 73a5379937ec ("nvme-fabrics: allow to queue requests for live queues") Signed-off-by: James Smart <jsmart2021@gmail.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/nvme/host/fc.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index 6ffa8de2a0d7..5eee603bc249 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -2460,6 +2460,18 @@ nvme_fc_terminate_exchange(struct request *req, void *data, bool reserved) static void __nvme_fc_abort_outstanding_ios(struct nvme_fc_ctrl *ctrl, bool start_queues) { + int q; + + /* + * if aborting io, the queues are no longer good, mark them + * all as not live. + */ + if (ctrl->ctrl.queue_count > 1) { + for (q = 1; q < ctrl->ctrl.queue_count; q++) + clear_bit(NVME_FC_Q_LIVE, &ctrl->queues[q].flags); + } + clear_bit(NVME_FC_Q_LIVE, &ctrl->queues[0].flags); + /* * If io queues are present, stop them and terminate all outstanding * ios on them. As FC allocates FC exchange for each io, the -- 2.30.2
|