net: pass info struct via netdevice notifier
So far, only net_device * could be passed along with netdevice notifier
event. This patch provides a possibility to pass custom structure
able to provide info that event listener needs to know.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
v2->v3: fix typo on simeth
shortened dev_getter
shortened notifier_info struct name
v1->v2: fix notifier_call parameter in call_netdevice_notifier()
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index 5f74797..54fce60 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1391,6 +1391,20 @@
}
EXPORT_SYMBOL(dev_disable_lro);
+static void netdev_notifier_info_init(struct netdev_notifier_info *info,
+ struct net_device *dev)
+{
+ info->dev = dev;
+}
+
+static int call_netdevice_notifier(struct notifier_block *nb, unsigned long val,
+ struct net_device *dev)
+{
+ struct netdev_notifier_info info;
+
+ netdev_notifier_info_init(&info, dev);
+ return nb->notifier_call(nb, val, &info);
+}
static int dev_boot_phase = 1;
@@ -1423,7 +1437,7 @@
goto unlock;
for_each_net(net) {
for_each_netdev(net, dev) {
- err = nb->notifier_call(nb, NETDEV_REGISTER, dev);
+ err = call_netdevice_notifier(nb, NETDEV_REGISTER, dev);
err = notifier_to_errno(err);
if (err)
goto rollback;
@@ -1431,7 +1445,7 @@
if (!(dev->flags & IFF_UP))
continue;
- nb->notifier_call(nb, NETDEV_UP, dev);
+ call_netdevice_notifier(nb, NETDEV_UP, dev);
}
}
@@ -1447,10 +1461,11 @@
goto outroll;
if (dev->flags & IFF_UP) {
- nb->notifier_call(nb, NETDEV_GOING_DOWN, dev);
- nb->notifier_call(nb, NETDEV_DOWN, dev);
+ call_netdevice_notifier(nb, NETDEV_GOING_DOWN,
+ dev);
+ call_netdevice_notifier(nb, NETDEV_DOWN, dev);
}
- nb->notifier_call(nb, NETDEV_UNREGISTER, dev);
+ call_netdevice_notifier(nb, NETDEV_UNREGISTER, dev);
}
}
@@ -1488,10 +1503,11 @@
for_each_net(net) {
for_each_netdev(net, dev) {
if (dev->flags & IFF_UP) {
- nb->notifier_call(nb, NETDEV_GOING_DOWN, dev);
- nb->notifier_call(nb, NETDEV_DOWN, dev);
+ call_netdevice_notifier(nb, NETDEV_GOING_DOWN,
+ dev);
+ call_netdevice_notifier(nb, NETDEV_DOWN, dev);
}
- nb->notifier_call(nb, NETDEV_UNREGISTER, dev);
+ call_netdevice_notifier(nb, NETDEV_UNREGISTER, dev);
}
}
unlock:
@@ -1501,6 +1517,25 @@
EXPORT_SYMBOL(unregister_netdevice_notifier);
/**
+ * call_netdevice_notifiers_info - call all network notifier blocks
+ * @val: value passed unmodified to notifier function
+ * @dev: net_device pointer passed unmodified to notifier function
+ * @info: notifier information data
+ *
+ * Call all network notifier blocks. Parameters and return value
+ * are as for raw_notifier_call_chain().
+ */
+
+int call_netdevice_notifiers_info(unsigned long val, struct net_device *dev,
+ struct netdev_notifier_info *info)
+{
+ ASSERT_RTNL();
+ netdev_notifier_info_init(info, dev);
+ return raw_notifier_call_chain(&netdev_chain, val, info);
+}
+EXPORT_SYMBOL(call_netdevice_notifiers_info);
+
+/**
* call_netdevice_notifiers - call all network notifier blocks
* @val: value passed unmodified to notifier function
* @dev: net_device pointer passed unmodified to notifier function
@@ -1511,8 +1546,9 @@
int call_netdevice_notifiers(unsigned long val, struct net_device *dev)
{
- ASSERT_RTNL();
- return raw_notifier_call_chain(&netdev_chain, val, dev);
+ struct netdev_notifier_info info;
+
+ return call_netdevice_notifiers_info(val, dev, &info);
}
EXPORT_SYMBOL(call_netdevice_notifiers);