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
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
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
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
