Ejemplo n.º 1
0
    def _release_dev(self, pci_id):
        """
        Release a single PCI device.

        @param pci_id: PCI ID of a given PCI device.
        """
        base_dir = "/sys/bus/pci"
        full_id = virt_utils.get_full_pci_id(pci_id)
        vendor_id = virt_utils.get_vendor_from_pci_id(pci_id)
        drv_path = os.path.join(base_dir, "devices/%s/driver" % full_id)
        if 'pci-stub' in os.readlink(drv_path):
            cmd = "echo '%s' > %s/new_id" % (vendor_id, drv_path)
            if os.system(cmd):
                return False

            stub_path = os.path.join(base_dir, "drivers/pci-stub")
            cmd = "echo '%s' > %s/unbind" % (full_id, stub_path)
            if os.system(cmd):
                return False

            driver = self.dev_drivers[pci_id]
            cmd = "echo '%s' > %s/bind" % (full_id, driver)
            if os.system(cmd):
                return False

        return True
Ejemplo n.º 2
0
    def _release_dev(self, pci_id):
        """
        Release a single PCI device.

        @param pci_id: PCI ID of a given PCI device.
        """
        base_dir = "/sys/bus/pci"
        full_id = virt_utils.get_full_pci_id(pci_id)
        vendor_id = virt_utils.get_vendor_from_pci_id(pci_id)
        drv_path = os.path.join(base_dir, "devices/%s/driver" % full_id)
        if 'pci-stub' in os.readlink(drv_path):
            cmd = "echo '%s' > %s/new_id" % (vendor_id, drv_path)
            if os.system(cmd):
                return False

            stub_path = os.path.join(base_dir, "drivers/pci-stub")
            cmd = "echo '%s' > %s/unbind" % (full_id, stub_path)
            if os.system(cmd):
                return False

            driver = self.dev_drivers[pci_id]
            cmd = "echo '%s' > %s/bind" % (full_id, driver)
            if os.system(cmd):
                return False

        return True
Ejemplo n.º 3
0
    def request_devs(self):
        """
        Implement setup process: unbind the PCI device and then bind it
        to the pci-stub driver.

        @return: a list of successfully requested devices' PCI IDs.
        """
        base_dir = "/sys/bus/pci"
        stub_path = os.path.join(base_dir, "drivers/pci-stub")

        self.pci_ids = self.get_devs(self.devices_requested)
        logging.debug("The following pci_ids were found: %s", self.pci_ids)
        requested_pci_ids = []
        self.dev_drivers = {}

        # Setup all devices specified for assignment to guest
        for pci_id in self.pci_ids:
            full_id = virt_utils.get_full_pci_id(pci_id)
            if not full_id:
                continue
            drv_path = os.path.join(base_dir, "devices/%s/driver" % full_id)
            dev_prev_driver = os.path.realpath(os.path.join(drv_path,
                                               os.readlink(drv_path)))
            self.dev_drivers[pci_id] = dev_prev_driver

            # Judge whether the device driver has been binded to stub
            if not self.is_binded_to_stub(full_id):
                logging.debug("Binding device %s to stub", full_id)
                vendor_id = virt_utils.get_vendor_from_pci_id(pci_id)
                stub_new_id = os.path.join(stub_path, 'new_id')
                unbind_dev = os.path.join(drv_path, 'unbind')
                stub_bind = os.path.join(stub_path, 'bind')

                info_write_to_files = [(vendor_id, stub_new_id),
                                       (full_id, unbind_dev),
                                       (full_id, stub_bind)]

                for content, file in info_write_to_files:
                    try:
                        utils.open_write_close(file, content)
                    except IOError:
                        logging.debug("Failed to write %s to file %s", content,
                                      file)
                        continue

                if not self.is_binded_to_stub(full_id):
                    logging.error("Binding device %s to stub failed", pci_id)
                    continue
            else:
                logging.debug("Device %s already binded to stub", pci_id)
            requested_pci_ids.append(pci_id)
        self.pci_ids = requested_pci_ids
        return self.pci_ids
Ejemplo n.º 4
0
    def request_devs(self):
        """
        Implement setup process: unbind the PCI device and then bind it
        to the pci-stub driver.

        @return: a list of successfully requested devices' PCI IDs.
        """
        base_dir = "/sys/bus/pci"
        stub_path = os.path.join(base_dir, "drivers/pci-stub")

        self.pci_ids = self.get_devs(self.devices_requested)
        logging.debug("The following pci_ids were found: %s", self.pci_ids)
        requested_pci_ids = []
        self.dev_drivers = {}

        # Setup all devices specified for assignment to guest
        for pci_id in self.pci_ids:
            full_id = virt_utils.get_full_pci_id(pci_id)
            if not full_id:
                continue
            drv_path = os.path.join(base_dir, "devices/%s/driver" % full_id)
            dev_prev_driver = os.path.realpath(
                os.path.join(drv_path, os.readlink(drv_path)))
            self.dev_drivers[pci_id] = dev_prev_driver

            # Judge whether the device driver has been binded to stub
            if not self.is_binded_to_stub(full_id):
                logging.debug("Binding device %s to stub", full_id)
                vendor_id = virt_utils.get_vendor_from_pci_id(pci_id)
                stub_new_id = os.path.join(stub_path, 'new_id')
                unbind_dev = os.path.join(drv_path, 'unbind')
                stub_bind = os.path.join(stub_path, 'bind')

                info_write_to_files = [(vendor_id, stub_new_id),
                                       (full_id, unbind_dev),
                                       (full_id, stub_bind)]

                for content, file in info_write_to_files:
                    try:
                        utils.open_write_close(file, content)
                    except IOError:
                        logging.debug("Failed to write %s to file %s", content,
                                      file)
                        continue

                if not self.is_binded_to_stub(full_id):
                    logging.error("Binding device %s to stub failed", pci_id)
                    continue
            else:
                logging.debug("Device %s already binded to stub", pci_id)
            requested_pci_ids.append(pci_id)
        self.pci_ids = requested_pci_ids
        return self.pci_ids