static int nvme_tcp_setup_ctrl()

in host/tcp.c [1996:2066]

• 57 lines of code
• 11 McCabe index (conditional complexity)

static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new)
{
	struct nvmf_ctrl_options *opts = ctrl->opts;
	int ret;

	ret = nvme_tcp_configure_admin_queue(ctrl, new);
	if (ret)
		return ret;

	if (ctrl->icdoff) {
		ret = -EOPNOTSUPP;
		dev_err(ctrl->device, "icdoff is not supported!\n");
		goto destroy_admin;
	}

	if (!nvme_ctrl_sgl_supported(ctrl)) {
		ret = -EOPNOTSUPP;
		dev_err(ctrl->device, "Mandatory sgls are not supported!\n");
		goto destroy_admin;
	}

	if (opts->queue_size > ctrl->sqsize + 1)
		dev_warn(ctrl->device,
			"queue_size %zu > ctrl sqsize %u, clamping down\n",
			opts->queue_size, ctrl->sqsize + 1);

	if (ctrl->sqsize + 1 > ctrl->maxcmd) {
		dev_warn(ctrl->device,
			"sqsize %u > ctrl maxcmd %u, clamping down\n",
			ctrl->sqsize + 1, ctrl->maxcmd);
		ctrl->sqsize = ctrl->maxcmd - 1;
	}

	if (ctrl->queue_count > 1) {
		ret = nvme_tcp_configure_io_queues(ctrl, new);
		if (ret)
			goto destroy_admin;
	}

	if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_LIVE)) {
		/*
		 * state change failure is ok if we started ctrl delete,
		 * unless we're during creation of a new controller to
		 * avoid races with teardown flow.
		 */
		WARN_ON_ONCE(ctrl->state != NVME_CTRL_DELETING &&
			     ctrl->state != NVME_CTRL_DELETING_NOIO);
		WARN_ON_ONCE(new);
		ret = -EINVAL;
		goto destroy_io;
	}

	nvme_start_ctrl(ctrl);
	return 0;

destroy_io:
	if (ctrl->queue_count > 1) {
		nvme_stop_queues(ctrl);
		nvme_sync_io_queues(ctrl);
		nvme_tcp_stop_io_queues(ctrl);
		nvme_cancel_tagset(ctrl);
		nvme_tcp_destroy_io_queues(ctrl, new);
	}
destroy_admin:
	nvme_stop_admin_queue(ctrl);
	blk_sync_queue(ctrl->admin_q);
	nvme_tcp_stop_queue(ctrl, 0);
	nvme_cancel_admin_tagset(ctrl);
	nvme_tcp_destroy_admin_queue(ctrl, new);
	return ret;
}