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authorPatrick McHardy <kaber@trash.net>2007-07-11 19:42:13 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-07-11 19:45:33 -0700
commit2d85cba2b272a5201a60966a65a4f8c0bcc0bb71 (patch)
treef8dd1ca6d7c963eade714a4ecc7aec4d7751f55a /net/core
parent8c979c26a0f093c13290320edda799d8335e50ae (diff)
downloadop-kernel-dev-2d85cba2b272a5201a60966a65a4f8c0bcc0bb71.zip
op-kernel-dev-2d85cba2b272a5201a60966a65a4f8c0bcc0bb71.tar.gz
[RTNETLINK]: rtnl_link API simplification
All drivers need to unregister their devices in the module unload function. While doing so they must hold the rtnl and atomically unregister the rtnl_link ops as well. This makes the rtnl_link_unregister function that takes the rtnl itself completely useless. Provide default newlink/dellink functions, make __rtnl_link_unregister and rtnl_link_unregister unregister all devices with matching rtnl_link_ops and change the existing users to take advantage of that. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/rtnetlink.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 54c17e4..7b6b163 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -270,6 +270,9 @@ static LIST_HEAD(link_ops);
*/
int __rtnl_link_register(struct rtnl_link_ops *ops)
{
+ if (!ops->dellink)
+ ops->dellink = unregister_netdevice;
+
list_add_tail(&ops->list, &link_ops);
return 0;
}
@@ -298,12 +301,16 @@ EXPORT_SYMBOL_GPL(rtnl_link_register);
* __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink.
* @ops: struct rtnl_link_ops * to unregister
*
- * The caller must hold the rtnl_mutex. This function should be used
- * by drivers that unregister devices during module unloading. It must
- * be called after unregistering the devices.
+ * The caller must hold the rtnl_mutex.
*/
void __rtnl_link_unregister(struct rtnl_link_ops *ops)
{
+ struct net_device *dev, *n;
+
+ for_each_netdev_safe(dev, n) {
+ if (dev->rtnl_link_ops == ops)
+ ops->dellink(dev);
+ }
list_del(&ops->list);
}
@@ -1067,7 +1074,10 @@ replay:
if (tb[IFLA_LINKMODE])
dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
- err = ops->newlink(dev, tb, data);
+ if (ops->newlink)
+ err = ops->newlink(dev, tb, data);
+ else
+ err = register_netdevice(dev);
err_free:
if (err < 0)
free_netdev(dev);
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