nvme-fc: add support for duplicate_connect option (56d5f4f1) · Commits · 戴 / test

drivers/nvme/host/fc.c

+33 −0

Original line number	Diff line number	Diff line
		@@ -2792,6 +2792,33 @@ static const struct blk_mq_ops nvme_fc_admin_mq_ops = {
		};


		/*
		* Fails a controller request if it matches an existing controller
		* (association) with the same tuple:
		* <Host NQN, Host ID, local FC port, remote FC port, SUBSYS NQN>
		*
		* The ports don't need to be compared as they are intrinsically
		* already matched by the port pointers supplied.
		*/
		static bool
		nvme_fc_existing_controller(struct nvme_fc_rport *rport,
		struct nvmf_ctrl_options *opts)
		{
		struct nvme_fc_ctrl *ctrl;
		unsigned long flags;
		bool found = false;

		spin_lock_irqsave(&rport->lock, flags);
		list_for_each_entry(ctrl, &rport->ctrl_list, ctrl_list) {
		found = nvmf_ctlr_matches_baseopts(&ctrl->ctrl, opts);
		if (found)
		break;
		}
		spin_unlock_irqrestore(&rport->lock, flags);

		return found;
		}

		static struct nvme_ctrl *
		nvme_fc_init_ctrl(struct device dev, struct nvmf_ctrl_options opts,
		struct nvme_fc_lport lport, struct nvme_fc_rport rport)
		@@ -2806,6 +2833,12 @@ nvme_fc_init_ctrl(struct device dev, struct nvmf_ctrl_options opts,
		goto out_fail;
		}

		if (!opts->duplicate_connect &&
		nvme_fc_existing_controller(rport, opts)) {
		ret = -EALREADY;
		goto out_fail;
		}

		ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
		if (!ctrl) {
		ret = -ENOMEM;