[patch net-next 07/26] net: add possibility to pass information about upper device via notifier

Jiri Pirko
2015-12-01T13:49:17Z

From: Jiri Pirko <jiri@mellanox.com>

Sometimes the drivers and other code would find it handy to know some
internal information about upper device being changed. So allow upper-code
to pass information down to notifier listeners during linking.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
---
drivers/net/bonding/bond_main.c | 2 +-
drivers/net/team/team.c | 2 +-
drivers/net/vrf.c | 2 +-
include/linux/netdevice.h | 3 ++-
net/batman-adv/hard-interface.c | 2 +-
net/bridge/br_if.c | 2 +-
net/core/dev.c | 11 +++++++----
net/openvswitch/vport-netdev.c | 2 +-
8 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 9240157..fa3ed1d 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1204,7 +1204,7 @@ static int bond_master_upper_dev_link(struct net_device *bond_dev,
{
int err;

- err = netdev_master_upper_dev_link(slave_dev, bond_dev, slave);
+ err = netdev_master_upper_dev_link(slave_dev, bond_dev, slave, NULL);
if (err)
return err;
slave_dev->flags |= IFF_SLAVE;
diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
index b37f8d1..f7b6ff7 100644
--- a/drivers/net/team/team.c
+++ b/drivers/net/team/team.c
@@ -1083,7 +1083,7 @@ static int team_upper_dev_link(struct net_device *dev,
{
int err;

- err = netdev_master_upper_dev_link(port_dev, dev, NULL);
+ err = netdev_master_upper_dev_link(port_dev, dev, NULL, NULL);
if (err)
return err;
port_dev->priv_flags |= IFF_TEAM_PORT;
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index 59c5bdd..8944a49 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -624,7 +624,7 @@ static int do_vrf_add_slave(struct net_device *dev, struct net_device *port_dev)
goto out_fail;
}

- ret = netdev_master_upper_dev_link(port_dev, dev, NULL);
+ ret = netdev_master_upper_dev_link(port_dev, dev, NULL, NULL);
if (ret < 0)
goto out_unregister;

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index cca4111..a55be5b 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2161,6 +2161,7 @@ struct netdev_notifier_changeupper_info {
struct net_device *upper_dev; /* new upper dev */
bool master; /* is upper dev master */
bool linking; /* is the nofication for link or unlink */
+ void *upper_info; /* is upper dev info */
};

static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
@@ -3618,7 +3619,7 @@ struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
int netdev_master_upper_dev_link(struct net_device *dev,
struct net_device *upper_dev,
- void *upper_priv);
+ void *upper_priv, void *upper_info);
void netdev_upper_dev_unlink(struct net_device *dev,
struct net_device *upper_dev);
void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index a7f4f10..aa8867e 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -465,7 +465,7 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
bat_priv = netdev_priv(hard_iface->soft_iface);

ret = netdev_master_upper_dev_link(hard_iface->net_dev,
- soft_iface, NULL);
+ soft_iface, NULL, NULL);
if (ret)
goto err_dev;

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 781abc34..8d1d4a2 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -493,7 +493,7 @@ int br_add_if(struct net_bridge *br, struct net_device *dev)

dev->priv_flags |= IFF_BRIDGE_PORT;

- err = netdev_master_upper_dev_link(dev, br->dev, NULL);
+ err = netdev_master_upper_dev_link(dev, br->dev, NULL, NULL);
if (err)
goto err5;

diff --git a/net/core/dev.c b/net/core/dev.c
index d2155c2..3fe1ce2 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5421,7 +5421,7 @@ static void __netdev_adjacent_dev_unlink_neighbour(struct net_device *dev,

static int __netdev_upper_dev_link(struct net_device *dev,
struct net_device *upper_dev, bool master,
- void *upper_priv)
+ void *upper_priv, void *upper_info)
{
struct netdev_notifier_changeupper_info changeupper_info;
struct netdev_adjacent *i, *j, *to_i, *to_j;
@@ -5445,6 +5445,7 @@ static int __netdev_upper_dev_link(struct net_device *dev,
changeupper_info.upper_dev = upper_dev;
changeupper_info.master = master;
changeupper_info.linking = true;
+ changeupper_info.upper_info = upper_info;

ret = call_netdevice_notifiers_info(NETDEV_PRECHANGEUPPER, dev,
&changeupper_info.info);
@@ -5545,7 +5546,7 @@ rollback_mesh:
int netdev_upper_dev_link(struct net_device *dev,
struct net_device *upper_dev)
{
- return __netdev_upper_dev_link(dev, upper_dev, false, NULL);
+ return __netdev_upper_dev_link(dev, upper_dev, false, NULL, NULL);
}
EXPORT_SYMBOL(netdev_upper_dev_link);

@@ -5554,6 +5555,7 @@ EXPORT_SYMBOL(netdev_upper_dev_link);
* @dev: device
* @upper_dev: new upper device
* @upper_priv: upper device private
+ * @upper_info: upper info to be passed down via notifier
*
* Adds a link to device which is upper to this one. In this case, only
* one master upper device can be linked, although other non-master devices
@@ -5563,9 +5565,10 @@ EXPORT_SYMBOL(netdev_upper_dev_link);
*/
int netdev_master_upper_dev_link(struct net_device *dev,
struct net_device *upper_dev,
- void *upper_priv)
+ void *upper_priv, void *upper_info)
{
- return __netdev_upper_dev_link(dev, upper_dev, true, upper_priv);
+ return __netdev_upper_dev_link(dev, upper_dev, true,
+ upper_priv, upper_info);
}
EXPORT_SYMBOL(netdev_master_upper_dev_link);

diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c
index 3ee3df1..8f4dd4c 100644
--- a/net/openvswitch/vport-netdev.c
+++ b/net/openvswitch/vport-netdev.c
@@ -105,7 +105,7 @@ struct vport *ovs_netdev_link(struct vport *vport, const char *name)

rtnl_lock();
err = netdev_master_upper_dev_link(vport->dev,
- get_dpdev(vport->dp), NULL);
+ get_dpdev(vport->dp), NULL, NULL);
if (err)
goto error_unlock;

--
1.9.3