1 files changed, 56 insertions, 88 deletions

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 0bad65803271..b528a2f5826c 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -142,6 +142,7 @@ struct nvme_fc_ctrl {
 	struct nvme_fc_rport	*rport;
 	u32			cnum;
 
+	bool			ioq_live;
 	bool			assoc_active;
 	u64			association_id;
 
@@ -1470,21 +1471,6 @@ nvme_fc_xmt_disconnect_assoc(struct nvme_fc_ctrl *ctrl)
 
 static void nvme_fc_error_recovery(struct nvme_fc_ctrl *ctrl, char *errmsg);
 
-static int
-nvme_fc_reinit_request(void *data, struct request *rq)
-{
-	struct nvme_fc_fcp_op *op = blk_mq_rq_to_pdu(rq);
-	struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu;
-
-	memset(cmdiu, 0, sizeof(*cmdiu));
-	cmdiu->scsi_id = NVME_CMD_SCSI_ID;
-	cmdiu->fc_id = NVME_CMD_FC_ID;
-	cmdiu->iu_len = cpu_to_be16(sizeof(*cmdiu) / sizeof(u32));
-	memset(&op->rsp_iu, 0, sizeof(op->rsp_iu));
-
-	return 0;
-}
-
 static void
 __nvme_fc_exit_request(struct nvme_fc_ctrl *ctrl,
 		struct nvme_fc_fcp_op *op)
@@ -1893,6 +1879,7 @@ nvme_fc_free_queue(struct nvme_fc_queue *queue)
 	 */
 
 	queue->connection_id = 0;
+	atomic_set(&queue->csn, 1);
 }
 
 static void
@@ -2279,14 +2266,13 @@ nvme_fc_queue_rq(struct blk_mq_hw_ctx *hctx,
 	struct nvme_fc_cmd_iu *cmdiu = &op->cmd_iu;
 	struct nvme_command *sqe = &cmdiu->sqe;
 	enum nvmefc_fcp_datadir	io_dir;
+	bool queue_ready = test_bit(NVME_FC_Q_LIVE, &queue->flags);
 	u32 data_len;
 	blk_status_t ret;
 
-	ret = nvmf_check_if_ready(&queue->ctrl->ctrl, rq,
-		test_bit(NVME_FC_Q_LIVE, &queue->flags),
-		ctrl->rport->remoteport.port_state == FC_OBJSTATE_ONLINE);
-	if (unlikely(ret))
-		return ret;
+	if (ctrl->rport->remoteport.port_state != FC_OBJSTATE_ONLINE ||
+	    !nvmf_check_ready(&queue->ctrl->ctrl, rq, queue_ready))
+		return nvmf_fail_nonready_command(rq);
 
 	ret = nvme_setup_cmd(ns, rq, sqe);
 	if (ret)
@@ -2463,6 +2449,8 @@ nvme_fc_create_io_queues(struct nvme_fc_ctrl *ctrl)
 	if (ret)
 		goto out_delete_hw_queues;
 
+	ctrl->ioq_live = true;
+
 	return 0;
 
 out_delete_hw_queues:
@@ -2480,7 +2468,7 @@ out_free_tag_set:
 }
 
 static int
-nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl)
+nvme_fc_recreate_io_queues(struct nvme_fc_ctrl *ctrl)
 {
 	struct nvmf_ctrl_options *opts = ctrl->ctrl.opts;
 	unsigned int nr_io_queues;
@@ -2500,12 +2488,6 @@ nvme_fc_reinit_io_queues(struct nvme_fc_ctrl *ctrl)
 	if (ctrl->ctrl.queue_count == 1)
 		return 0;
 
-	nvme_fc_init_io_queues(ctrl);
-
-	ret = nvme_reinit_tagset(&ctrl->ctrl, ctrl->ctrl.tagset);
-	if (ret)
-		goto out_free_io_queues;
-
 	ret = nvme_fc_create_hw_io_queues(ctrl, ctrl->ctrl.sqsize + 1);
 	if (ret)
 		goto out_free_io_queues;
@@ -2603,8 +2585,6 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
 	 * Create the admin queue
 	 */
 
-	nvme_fc_init_queue(ctrl, 0);
-
 	ret = __nvme_fc_create_hw_queue(ctrl, &ctrl->queues[0], 0,
 				NVME_AQ_DEPTH);
 	if (ret)
@@ -2615,8 +2595,7 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
 	if (ret)
 		goto out_delete_hw_queue;
 
-	if (ctrl->ctrl.state != NVME_CTRL_NEW)
-		blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
+	blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
 
 	ret = nvmf_connect_admin_queue(&ctrl->ctrl);
 	if (ret)
@@ -2689,10 +2668,10 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
 	 */
 
 	if (ctrl->ctrl.queue_count > 1) {
-		if (ctrl->ctrl.state == NVME_CTRL_NEW)
+		if (!ctrl->ioq_live)
 			ret = nvme_fc_create_io_queues(ctrl);
 		else
-			ret = nvme_fc_reinit_io_queues(ctrl);
+			ret = nvme_fc_recreate_io_queues(ctrl);
 		if (ret)
 			goto out_term_aen_ops;
 	}
@@ -2776,8 +2755,7 @@ nvme_fc_delete_association(struct nvme_fc_ctrl *ctrl)
 	 * use blk_mq_tagset_busy_itr() and the transport routine to
 	 * terminate the exchanges.
 	 */
-	if (ctrl->ctrl.state != NVME_CTRL_NEW)
-		blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
+	blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
 	blk_mq_tagset_busy_iter(&ctrl->admin_tag_set,
 				nvme_fc_terminate_exchange, &ctrl->ctrl);
 
@@ -2917,7 +2895,6 @@ static const struct nvme_ctrl_ops nvme_fc_ctrl_ops = {
 	.submit_async_event	= nvme_fc_submit_async_event,
 	.delete_ctrl		= nvme_fc_delete_ctrl,
 	.get_address		= nvmf_get_address,
-	.reinit_request		= nvme_fc_reinit_request,
 };
 
 static void
@@ -2934,7 +2911,7 @@ nvme_fc_connect_ctrl_work(struct work_struct *work)
 		nvme_fc_reconnect_or_delete(ctrl, ret);
 	else
 		dev_info(ctrl->ctrl.device,
-			"NVME-FC{%d}: controller reconnect complete\n",
+			"NVME-FC{%d}: controller connect complete\n",
 			ctrl->cnum);
 }
 
@@ -2982,7 +2959,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 {
 	struct nvme_fc_ctrl *ctrl;
 	unsigned long flags;
-	int ret, idx, retry;
+	int ret, idx;
 
 	if (!(rport->remoteport.port_role &
 	    (FC_PORT_ROLE_NVME_DISCOVERY | FC_PORT_ROLE_NVME_TARGET))) {
@@ -3009,11 +2986,13 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 	}
 
 	ctrl->ctrl.opts = opts;
+	ctrl->ctrl.nr_reconnects = 0;
 	INIT_LIST_HEAD(&ctrl->ctrl_list);
 	ctrl->lport = lport;
 	ctrl->rport = rport;
 	ctrl->dev = lport->dev;
 	ctrl->cnum = idx;
+	ctrl->ioq_live = false;
 	ctrl->assoc_active = false;
 	init_waitqueue_head(&ctrl->ioabort_wait);
 
@@ -3032,6 +3011,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 
 	ctrl->ctrl.sqsize = opts->queue_size - 1;
 	ctrl->ctrl.kato = opts->kato;
+	ctrl->ctrl.cntlid = 0xffff;
 
 	ret = -ENOMEM;
 	ctrl->queues = kcalloc(ctrl->ctrl.queue_count,
@@ -3039,6 +3019,8 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 	if (!ctrl->queues)
 		goto out_free_ida;
 
+	nvme_fc_init_queue(ctrl, 0);
+
 	memset(&ctrl->admin_tag_set, 0, sizeof(ctrl->admin_tag_set));
 	ctrl->admin_tag_set.ops = &nvme_fc_admin_mq_ops;
 	ctrl->admin_tag_set.queue_depth = NVME_AQ_MQ_TAG_DEPTH;
@@ -3081,62 +3063,24 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 	list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list);
 	spin_unlock_irqrestore(&rport->lock, flags);
 
-	/*
-	 * It's possible that transactions used to create the association
-	 * may fail. Examples: CreateAssociation LS or CreateIOConnection
-	 * LS gets dropped/corrupted/fails; or a frame gets dropped or a
-	 * command times out for one of the actions to init the controller
-	 * (Connect, Get/Set_Property, Set_Features, etc). Many of these
-	 * transport errors (frame drop, LS failure) inherently must kill
-	 * the association. The transport is coded so that any command used
-	 * to create the association (prior to a LIVE state transition
-	 * while NEW or CONNECTING) will fail if it completes in error or
-	 * times out.
-	 *
-	 * As such: as the connect request was mostly likely due to a
-	 * udev event that discovered the remote port, meaning there is
-	 * not an admin or script there to restart if the connect
-	 * request fails, retry the initial connection creation up to
-	 * three times before giving up and declaring failure.
-	 */
-	for (retry = 0; retry < 3; retry++) {
-		ret = nvme_fc_create_association(ctrl);
-		if (!ret)
-			break;
-	}
-
-	if (ret) {
-		nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING);
-		cancel_work_sync(&ctrl->ctrl.reset_work);
-		cancel_delayed_work_sync(&ctrl->connect_work);
-
-		/* couldn't schedule retry - fail out */
+	if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING) ||
+	    !nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) {
 		dev_err(ctrl->ctrl.device,
-			"NVME-FC{%d}: Connect retry failed\n", ctrl->cnum);
-
-		ctrl->ctrl.opts = NULL;
+			"NVME-FC{%d}: failed to init ctrl state\n", ctrl->cnum);
+		goto fail_ctrl;
+	}
 
-		/* initiate nvme ctrl ref counting teardown */
-		nvme_uninit_ctrl(&ctrl->ctrl);
+	nvme_get_ctrl(&ctrl->ctrl);
 
-		/* Remove core ctrl ref. */
+	if (!queue_delayed_work(nvme_wq, &ctrl->connect_work, 0)) {
 		nvme_put_ctrl(&ctrl->ctrl);
-
-		/* as we're past the point where we transition to the ref
-		 * counting teardown path, if we return a bad pointer here,
-		 * the calling routine, thinking it's prior to the
-		 * transition, will do an rport put. Since the teardown
-		 * path also does a rport put, we do an extra get here to
-		 * so proper order/teardown happens.
-		 */
-		nvme_fc_rport_get(rport);
-
-		if (ret > 0)
-			ret = -EIO;
-		return ERR_PTR(ret);
+		dev_err(ctrl->ctrl.device,
+			"NVME-FC{%d}: failed to schedule initial connect\n",
+			ctrl->cnum);
+		goto fail_ctrl;
 	}
 
-	nvme_get_ctrl(&ctrl->ctrl);
+	flush_delayed_work(&ctrl->connect_work);
 
 	dev_info(ctrl->ctrl.device,
 		"NVME-FC{%d}: new ctrl: NQN \"%s\"\n",
@@ -3144,6 +3088,30 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 
 	return &ctrl->ctrl;
 
+fail_ctrl:
+	nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_DELETING);
+	cancel_work_sync(&ctrl->ctrl.reset_work);
+	cancel_delayed_work_sync(&ctrl->connect_work);
+
+	ctrl->ctrl.opts = NULL;
+
+	/* initiate nvme ctrl ref counting teardown */
+	nvme_uninit_ctrl(&ctrl->ctrl);
+
+	/* Remove core ctrl ref. */
+	nvme_put_ctrl(&ctrl->ctrl);
+
+	/* as we're past the point where we transition to the ref
+	 * counting teardown path, if we return a bad pointer here,
+	 * the calling routine, thinking it's prior to the
+	 * transition, will do an rport put. Since the teardown
+	 * path also does a rport put, we do an extra get here to
+	 * so proper order/teardown happens.
+	 */
+	nvme_fc_rport_get(rport);
+
+	return ERR_PTR(-EIO);
+
 out_cleanup_admin_q:
 	blk_cleanup_queue(ctrl->ctrl.admin_q);
 out_free_admin_tag_set: