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net: introduce change upper device notifier change info

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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>
This commit is contained in:
Jiri Pirko 2015-08-27 09:31:18 +02:00 • committed by David S. Miller
parent 547c890cfd
commit 0e4ead9d7b
2 changed files with 21 additions and 2 deletions
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7
include/linux/netdevice.h
View file

@ -2127,6 +2127,13 @@ struct netdev_notifier_change_info {
unsigned int flags_changed; 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, static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
struct net_device *dev) struct net_device *dev)
{ {

16
net/core/dev.c
View file

@ -5311,6 +5311,7 @@ static int __netdev_upper_dev_link(struct net_device *dev,
struct net_device *upper_dev, bool master, struct net_device *upper_dev, bool master,
void *private) void *private)
{ {
struct netdev_notifier_changeupper_info changeupper_info;
struct netdev_adjacent *i, *j, *to_i, *to_j; struct netdev_adjacent *i, *j, *to_i, *to_j;
int ret = 0; 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)) if (master && netdev_master_upper_dev_get(dev))
return -EBUSY; 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, ret = __netdev_adjacent_dev_link_neighbour(dev, upper_dev, private,
master); master);
if (ret) if (ret)
@ -5367,7 +5372,8 @@ static int __netdev_upper_dev_link(struct net_device *dev,
goto rollback_lower_mesh; goto rollback_lower_mesh;
} }
call_netdevice_notifiers(NETDEV_CHANGEUPPER, dev); call_netdevice_notifiers_info(NETDEV_CHANGEUPPER, dev,
&changeupper_info.info);
return 0; return 0;
rollback_lower_mesh: rollback_lower_mesh:
@ -5462,9 +5468,14 @@ EXPORT_SYMBOL(netdev_master_upper_dev_link_private);
void netdev_upper_dev_unlink(struct net_device *dev, void netdev_upper_dev_unlink(struct net_device *dev,
struct net_device *upper_dev) struct net_device *upper_dev)
{ {
struct netdev_notifier_changeupper_info changeupper_info;
struct netdev_adjacent *i, *j; struct netdev_adjacent *i, *j;
ASSERT_RTNL(); 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); __netdev_adjacent_dev_unlink_neighbour(dev, upper_dev);
/* Here is the tricky part. We must remove all dev's lower /* 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) list_for_each_entry(i, &upper_dev->all_adj_list.upper, list)
__netdev_adjacent_dev_unlink(dev, i->dev); __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); EXPORT_SYMBOL(netdev_upper_dev_unlink);