static int names_pci(struct udev_device *dev, struct netnames *names) {
struct udev_device *parent;
static int do_virtio = -1;
if (do_virtio < 0) {
_cleanup_free_ char *value = NULL;
int n = 0;
do_virtio = 0;
if (get_proc_cmdline_key("net.ifnames", NULL) > 0)
do_virtio = 1;
else if (get_proc_cmdline_key("net.ifnames=", &value) > 0) {
safe_atoi(value, &n);
if (n > 0)
do_virtio = 1;
}
}
parent = udev_device_get_parent(dev);
/* there can only ever be one virtio bus per parent device, so we can
safely ignore any virtio buses. see
<http://lists.linuxfoundation.org/pipermail/virtualization/2015-August/030331.html> */
if (do_virtio > 0)
while (parent && streq_ptr("virtio", udev_device_get_subsystem(parent)))
parent = udev_device_get_parent(parent);
if (!parent)
return -ENOENT;
/* check if our direct parent is a PCI device with no other bus in-between */
if (streq_ptr("pci", udev_device_get_subsystem(parent))) {
names->type = NET_PCI;
names->pcidev = parent;
} else {
names->pcidev = udev_device_get_parent_with_subsystem_devtype(dev, "pci", NULL);
if (!names->pcidev)
return -ENOENT;
}
dev_pci_onboard(dev, names);
dev_pci_slot(dev, names);
return 0;
}
int shall_restore_state(void) {
_cleanup_free_ char *value = NULL;
int r;
r = get_proc_cmdline_key("systemd.restore_state=", &value);
if (r < 0)
return r;
if (r == 0)
return true;
return parse_boolean(value);
}
