/*
* Get bridge parameters using either sysfs or old
* ioctl.
*/
static int br_get_bridge_info(const char *bridge, struct bridge_info *info)
{
#ifdef HAVE_LIBSYSFS
struct sysfs_class_device *dev;
char path[SYSFS_PATH_MAX];
if (!br_class_net)
goto fallback;
dev = sysfs_get_class_device(br_class_net, bridge);
if (!dev) {
dprintf("get_class_device '%s' failed\n", bridge);
goto fallback;
}
snprintf(path, SYSFS_PATH_MAX, "%s/bridge", dev->path);
if (sysfs_path_is_dir(path)) {
dprintf("path '%s' is not a directory\n", path);
sysfs_close_class_device(dev);
goto fallback;
}
memset(info, 0, sizeof(*info));
fetch_id(dev, BRIDGEATTR("root_id"), &info->designated_root);
fetch_id(dev, BRIDGEATTR("bridge_id"), &info->bridge_id);
info->root_path_cost = fetch_int(dev, BRIDGEATTR("root_path_cost"));
fetch_tv(dev, BRIDGEATTR("max_age"), &info->max_age);
fetch_tv(dev, BRIDGEATTR("hello_time"), &info->hello_time);
fetch_tv(dev, BRIDGEATTR("forward_delay"), &info->forward_delay);
fetch_tv(dev, BRIDGEATTR("max_age"), &info->bridge_max_age);
fetch_tv(dev, BRIDGEATTR("hello_time"), &info->bridge_hello_time);
fetch_tv(dev, BRIDGEATTR("forward_delay"), &info->bridge_forward_delay);
fetch_tv(dev, BRIDGEATTR("ageing_time"), &info->ageing_time);
fetch_tv(dev, BRIDGEATTR("hello_timer"), &info->hello_timer_value);
fetch_tv(dev, BRIDGEATTR("tcn_timer"), &info->tcn_timer_value);
fetch_tv(dev, BRIDGEATTR("topology_change_timer"),
&info->topology_change_timer_value);;
fetch_tv(dev, BRIDGEATTR("gc_timer"), &info->gc_timer_value);
info->root_port = fetch_int(dev, BRIDGEATTR("root_port"));
info->stp_enabled = fetch_int(dev, BRIDGEATTR("stp_state"));
info->topology_change = fetch_int(dev, BRIDGEATTR("topology_change"));
info->topology_change_detected = fetch_int(dev,
BRIDGEATTR
("topology_change_detected"));
sysfs_close_class_device(dev);
return 0;
fallback:
#endif
return old_get_bridge_info(bridge, info);
}
/**
* sysfs_open_class_device_path: Opens and populates class device
* @path: path to class device.
* returns struct sysfs_class_device with success and NULL with error.
*/
struct sysfs_class_device *sysfs_open_class_device_path(const char *path)
{
struct sysfs_class_device *cdev;
char temp_path[SYSFS_PATH_MAX];
if (!path) {
errno = EINVAL;
return NULL;
}
/*
* Post linux-2.6.14 driver model supports nested classes with
* links to the nested hierarchy at /sys/class/xxx/. Check for
* a link to the actual class device if a directory isn't found
*/
if (sysfs_path_is_dir(path)) {
dprintf("%s: Directory not found, checking for a link\n", path);
if (!sysfs_path_is_link(path)) {
if (sysfs_get_link(path, temp_path, SYSFS_PATH_MAX)) {
dprintf("Error retrieving link at %s\n", path);
return NULL;
}
} else {
dprintf("%s is not a valid class device path\n", path);
return NULL;
}
} else
safestrcpy(temp_path, path);
cdev = alloc_class_device();
if (!cdev) {
dprintf("calloc failed\n");
return NULL;
}
if (sysfs_get_name_from_path(temp_path, cdev->name, SYSFS_NAME_LEN)) {
errno = EINVAL;
dprintf("Error getting class device name\n");
sysfs_close_class_device(cdev);
return NULL;
}
safestrcpy(cdev->path, temp_path);
if (sysfs_remove_trailing_slash(cdev->path)) {
dprintf("Invalid path to class device %s\n", cdev->path);
sysfs_close_class_device(cdev);
return NULL;
}
set_classdev_classname(cdev);
return cdev;
}
static int br_set(const char *bridge, const char *name, unsigned long value, unsigned long oldcode)
{
int ret = -1;
#ifdef HAVE_LIBSYSFS
struct sysfs_class_device *dev;
dev = sysfs_get_class_device(br_class_net, bridge);
if (dev) {
struct sysfs_attribute *attr;
char buf[32];
char path[SYSFS_PATH_MAX];
snprintf(buf, sizeof(buf), "%ld\n", value);
snprintf(path, SYSFS_PATH_MAX, "%s/bridge/%s", dev->path, name);
attr = sysfs_open_attribute(path);
if (attr) {
ret = sysfs_write_attribute(attr, buf, strlen(buf));
sysfs_close_attribute(attr);
}
sysfs_close_class_device(dev);
} else
#endif
{
struct ifreq ifr;
unsigned long args[4] = { oldcode, value, 0, 0 };
strncpy(ifr.ifr_name, bridge, IFNAMSIZ);
ifr.ifr_data = (char *)&args;
ret = ioctl(br_socket_fd, SIOCDEVPRIVATE, &ifr);
}
return ret < 0 ? errno : 0;
}
/**
* sysfs_close_class_device: closes a single class device.
* @dev: class device to close.
*/
void sysfs_close_class_device(struct sysfs_class_device *dev)
{
if (dev) {
if (dev->parent)
sysfs_close_class_device(dev->parent);
if (dev->sysdevice)
sysfs_close_device(dev->sysdevice);
if (dev->attrlist)
dlist_destroy(dev->attrlist);
free(dev);
}
}
static void sysfs_close_cls_dev(void *dev)
{
sysfs_close_class_device((struct sysfs_class_device *)dev);
}