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authorJiri Pirko <jiri@mellanox.com>2015-08-27 09:31:18 +0200
committerDavid S. Miller <davem@davemloft.net>2015-08-27 16:28:34 -0700
commit0e4ead9d7b3655d76371604abb9b0dcc4e79bb7d (patch)
tree69989a0325ec37f10da8dba813fdd779b9c257f7
parent547c890cfd26010e01b3faf98f29ca9b2252c8d8 (diff)
downloadlinux-0e4ead9d7b3655d76371604abb9b0dcc4e79bb7d.tar.bz2
net: introduce change upper device notifier change info
Add info that is passed along with NETDEV_CHANGEUPPER event. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/netdevice.h7
-rw-r--r--net/core/dev.c16
2 files changed, 21 insertions, 2 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 6abe0d6f1e1d..39f30daac483 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2127,6 +2127,13 @@ struct netdev_notifier_change_info {
unsigned int flags_changed;
};
+struct netdev_notifier_changeupper_info {
+ struct netdev_notifier_info info; /* must be first */
+ struct net_device *upper_dev; /* new upper dev */
+ bool master; /* is upper dev master */
+ bool linking; /* is the nofication for link or unlink */
+};
+
static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
struct net_device *dev)
{
diff --git a/net/core/dev.c b/net/core/dev.c
index 7bb24f1879b8..a8e6cf4298d3 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5311,6 +5311,7 @@ static int __netdev_upper_dev_link(struct net_device *dev,
struct net_device *upper_dev, bool master,
void *private)
{
+ struct netdev_notifier_changeupper_info changeupper_info;
struct netdev_adjacent *i, *j, *to_i, *to_j;
int ret = 0;
@@ -5329,6 +5330,10 @@ static int __netdev_upper_dev_link(struct net_device *dev,
if (master && netdev_master_upper_dev_get(dev))
return -EBUSY;
+ changeupper_info.upper_dev = upper_dev;
+ changeupper_info.master = master;
+ changeupper_info.linking = true;
+
ret = __netdev_adjacent_dev_link_neighbour(dev, upper_dev, private,
master);
if (ret)
@@ -5367,7 +5372,8 @@ static int __netdev_upper_dev_link(struct net_device *dev,
goto rollback_lower_mesh;
}
- call_netdevice_notifiers(NETDEV_CHANGEUPPER, dev);
+ call_netdevice_notifiers_info(NETDEV_CHANGEUPPER, dev,
+ &changeupper_info.info);
return 0;
rollback_lower_mesh:
@@ -5462,9 +5468,14 @@ EXPORT_SYMBOL(netdev_master_upper_dev_link_private);
void netdev_upper_dev_unlink(struct net_device *dev,
struct net_device *upper_dev)
{
+ struct netdev_notifier_changeupper_info changeupper_info;
struct netdev_adjacent *i, *j;
ASSERT_RTNL();
+ changeupper_info.upper_dev = upper_dev;
+ changeupper_info.master = netdev_master_upper_dev_get(dev) == upper_dev;
+ changeupper_info.linking = false;
+
__netdev_adjacent_dev_unlink_neighbour(dev, upper_dev);
/* Here is the tricky part. We must remove all dev's lower
@@ -5484,7 +5495,8 @@ void netdev_upper_dev_unlink(struct net_device *dev,
list_for_each_entry(i, &upper_dev->all_adj_list.upper, list)
__netdev_adjacent_dev_unlink(dev, i->dev);
- call_netdevice_notifiers(NETDEV_CHANGEUPPER, dev);
+ call_netdevice_notifiers_info(NETDEV_CHANGEUPPER, dev,
+ &changeupper_info.info);
}
EXPORT_SYMBOL(netdev_upper_dev_unlink);