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-rw-r--r--drivers/nvme/host/fc.c73
1 files changed, 63 insertions, 10 deletions
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 0b70c8bab045..54032c466636 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -152,6 +152,7 @@ struct nvme_fc_ctrl {
bool ioq_live;
bool assoc_active;
+ atomic_t err_work_active;
u64 association_id;
struct list_head ctrl_list; /* rport->ctrl_list */
@@ -160,6 +161,7 @@ struct nvme_fc_ctrl {
struct blk_mq_tag_set tag_set;
struct delayed_work connect_work;
+ struct work_struct err_work;
struct kref ref;
u32 flags;
@@ -1531,6 +1533,10 @@ nvme_fc_abort_aen_ops(struct nvme_fc_ctrl *ctrl)
struct nvme_fc_fcp_op *aen_op = ctrl->aen_ops;
int i;
+ /* ensure we've initialized the ops once */
+ if (!(aen_op->flags & FCOP_FLAGS_AEN))
+ return;
+
for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++)
__nvme_fc_abort_op(ctrl, aen_op);
}
@@ -2049,7 +2055,25 @@ nvme_fc_nvme_ctrl_freed(struct nvme_ctrl *nctrl)
static void
nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg)
{
- /* only proceed if in LIVE state - e.g. on first error */
+ int active;
+
+ /*
+ * if an error (io timeout, etc) while (re)connecting,
+ * it's an error on creating the new association.
+ * Start the error recovery thread if it hasn't already
+ * been started. It is expected there could be multiple
+ * ios hitting this path before things are cleaned up.
+ */
+ if (ctrl->ctrl.state == NVME_CTRL_CONNECTING) {
+ active = atomic_xchg(&ctrl->err_work_active, 1);
+ if (!active && !schedule_work(&ctrl->err_work)) {
+ atomic_set(&ctrl->err_work_active, 0);
+ WARN_ON(1);
+ }
+ return;
+ }
+
+ /* Otherwise, only proceed if in LIVE state - e.g. on first error */
if (ctrl->ctrl.state != NVME_CTRL_LIVE)
return;
@@ -2814,6 +2838,7 @@ nvme_fc_delete_ctrl(struct nvme_ctrl *nctrl)
{
struct nvme_fc_ctrl *ctrl = to_fc_ctrl(nctrl);
+ cancel_work_sync(&ctrl->err_work);
cancel_delayed_work_sync(&ctrl->connect_work);
/*
* kill the association on the link side. this will block
@@ -2866,23 +2891,30 @@ nvme_fc_reconnect_or_delete(struct nvme_fc_ctrl *ctrl, int status)
}
static void
-nvme_fc_reset_ctrl_work(struct work_struct *work)
+__nvme_fc_terminate_io(struct nvme_fc_ctrl *ctrl)
{
- struct nvme_fc_ctrl *ctrl =
- container_of(work, struct nvme_fc_ctrl, ctrl.reset_work);
- int ret;
-
- nvme_stop_ctrl(&ctrl->ctrl);
+ nvme_stop_keep_alive(&ctrl->ctrl);
/* will block will waiting for io to terminate */
nvme_fc_delete_association(ctrl);
- if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) {
+ if (ctrl->ctrl.state != NVME_CTRL_CONNECTING &&
+ !nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING))
dev_err(ctrl->ctrl.device,
"NVME-FC{%d}: error_recovery: Couldn't change state "
"to CONNECTING\n", ctrl->cnum);
- return;
- }
+}
+
+static void
+nvme_fc_reset_ctrl_work(struct work_struct *work)
+{
+ struct nvme_fc_ctrl *ctrl =
+ container_of(work, struct nvme_fc_ctrl, ctrl.reset_work);
+ int ret;
+
+ __nvme_fc_terminate_io(ctrl);
+
+ nvme_stop_ctrl(&ctrl->ctrl);
if (ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE)
ret = nvme_fc_create_association(ctrl);
@@ -2897,6 +2929,24 @@ nvme_fc_reset_ctrl_work(struct work_struct *work)
ctrl->cnum);
}
+static void
+nvme_fc_connect_err_work(struct work_struct *work)
+{
+ struct nvme_fc_ctrl *ctrl =
+ container_of(work, struct nvme_fc_ctrl, err_work);
+
+ __nvme_fc_terminate_io(ctrl);
+
+ atomic_set(&ctrl->err_work_active, 0);
+
+ /*
+ * Rescheduling the connection after recovering
+ * from the io error is left to the reconnect work
+ * item, which is what should have stalled waiting on
+ * the io that had the error that scheduled this work.
+ */
+}
+
static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = {
.name = "fc",
.module = THIS_MODULE,
@@ -3007,6 +3057,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
ctrl->cnum = idx;
ctrl->ioq_live = false;
ctrl->assoc_active = false;
+ atomic_set(&ctrl->err_work_active, 0);
init_waitqueue_head(&ctrl->ioabort_wait);
get_device(ctrl->dev);
@@ -3014,6 +3065,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
INIT_WORK(&ctrl->ctrl.reset_work, nvme_fc_reset_ctrl_work);
INIT_DELAYED_WORK(&ctrl->connect_work, nvme_fc_connect_ctrl_work);
+ INIT_WORK(&ctrl->err_work, nvme_fc_connect_err_work);
spin_lock_init(&ctrl->lock);
/* io queue count */
@@ -3103,6 +3155,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
fail_ctrl:
nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING);
cancel_work_sync(&ctrl->ctrl.reset_work);
+ cancel_work_sync(&ctrl->err_work);
cancel_delayed_work_sync(&ctrl->connect_work);
ctrl->ctrl.opts = NULL;