static void ne_event_work_handler()

in drivers/virt/nitro_enclaves/ne_pci_dev.c [214:263]

• 30 lines of code
• 4 McCabe index (conditional complexity)

static void ne_event_work_handler(struct work_struct *work)
{
	struct ne_pci_dev_cmd_reply cmd_reply = {};
	struct ne_enclave *ne_enclave = NULL;
	struct ne_pci_dev *ne_pci_dev =
		container_of(work, struct ne_pci_dev, notify_work);
	struct pci_dev *pdev = ne_pci_dev->pdev;
	int rc = -EINVAL;
	struct slot_info_req slot_info_req = {};

	mutex_lock(&ne_pci_dev->enclaves_list_mutex);

	/*
	 * Iterate over all enclaves registered for the Nitro Enclaves
	 * PCI device and determine for which enclave(s) the out-of-band event
	 * is corresponding to.
	 */
	list_for_each_entry(ne_enclave, &ne_pci_dev->enclaves_list, enclave_list_entry) {
		mutex_lock(&ne_enclave->enclave_info_mutex);

		/*
		 * Enclaves that were never started cannot receive out-of-band
		 * events.
		 */
		if (ne_enclave->state != NE_STATE_RUNNING)
			goto unlock;

		slot_info_req.slot_uid = ne_enclave->slot_uid;

		rc = ne_do_request(pdev, SLOT_INFO,
				   &slot_info_req, sizeof(slot_info_req),
				   &cmd_reply, sizeof(cmd_reply));
		if (rc < 0)
			dev_err(&pdev->dev, "Error in slot info [rc=%d]\n", rc);

		/* Notify enclave process that the enclave state changed. */
		if (ne_enclave->state != cmd_reply.state) {
			ne_enclave->state = cmd_reply.state;

			ne_enclave->has_event = true;

			wake_up_interruptible(&ne_enclave->eventq);
		}

unlock:
		 mutex_unlock(&ne_enclave->enclave_info_mutex);
	}

	mutex_unlock(&ne_pci_dev->enclaves_list_mutex);
}