On 3/15/2019 1:57 AM, Jianchao Wang wrote:
blk_mq_tagset_busy_iter is not safe that it could get stale request
in tags->rqs[]. Use blk_mq_queue_tag_busy_iter here. A new helper
interface nvme_iterate_inflight_rqs is introduced to iterate
all of the ns under a ctrl.
Signed-off-by: Jianchao Wang <jianchao.w.wang@xxxxxxxxxx>
---
drivers/nvme/host/core.c | 12 ++++++++++++
drivers/nvme/host/fc.c | 12 ++++++------
drivers/nvme/host/nvme.h | 2 ++
drivers/nvme/host/pci.c | 5 +++--
drivers/nvme/host/rdma.c | 6 +++---
drivers/nvme/host/tcp.c | 5 +++--
drivers/nvme/target/loop.c | 6 +++---
7 files changed, 32 insertions(+), 16 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 6a9dd68..5760fad 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3816,6 +3816,18 @@ void nvme_start_queues(struct nvme_ctrl *ctrl)
}
EXPORT_SYMBOL_GPL(nvme_start_queues);
+void nvme_iterate_inflight_rqs(struct nvme_ctrl *ctrl,
+ busy_iter_fn *fn, void *data)
+{
+ struct nvme_ns *ns;
+
+ down_read(&ctrl->namespaces_rwsem);
+ list_for_each_entry(ns, &ctrl->namespaces, list)
+ blk_mq_queue_tag_busy_iter(ns->queue, fn, data, true);
+ up_read(&ctrl->namespaces_rwsem);
+}
+EXPORT_SYMBOL_GPL(nvme_iterate_inflight_rqs);
Hmm... so this aborts ios for namespaces. How about ios that aren't for
a namespace but rather for the controller itself. For example, anything
on the admin queue ? Rather critical for those ios be terminated as well.
-- james
