dev: introduce dev_get_iflink()
The goal of this patch is to prepare the removal of the iflink field. It
introduces a new ndo function, which will be implemented by virtual interfaces.
There is no functional change into this patch. All readers of iflink field
now call dev_get_iflink().
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 65492b0..77172d0 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -660,6 +660,23 @@
*******************************************************************************/
/**
+ * dev_get_iflink - get 'iflink' value of a interface
+ * @dev: targeted interface
+ *
+ * Indicates the ifindex the interface is linked to.
+ * Physical interfaces have the same 'ifindex' and 'iflink' values.
+ */
+
+int dev_get_iflink(const struct net_device *dev)
+{
+ if (dev->netdev_ops && dev->netdev_ops->ndo_get_iflink)
+ return dev->netdev_ops->ndo_get_iflink(dev);
+
+ return dev->iflink;
+}
+EXPORT_SYMBOL(dev_get_iflink);
+
+/**
* __dev_get_by_name - find a device by its name
* @net: the applicable net namespace
* @name: name to find
@@ -6345,7 +6362,7 @@
else if (__dev_get_by_index(net, dev->ifindex))
goto err_uninit;
- if (dev->iflink == -1)
+ if (dev_get_iflink(dev) == -1)
dev->iflink = dev->ifindex;
/* Transfer changeable features to wanted_features and enable
@@ -7061,7 +7078,7 @@
/* If there is an ifindex conflict assign a new one */
if (__dev_get_by_index(net, dev->ifindex)) {
- int iflink = (dev->iflink == dev->ifindex);
+ int iflink = (dev_get_iflink(dev) == dev->ifindex);
dev->ifindex = dev_new_index(net);
if (iflink)
dev->iflink = dev->ifindex;