Commit 04d48266 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller

net: introduce change lower state notifier

When lower device like bonding slave, team/bridge port, etc changes its
state, it is useful for others to notice this change. Currently this is
implemented specificly for bonding as NETDEV_BONDING_INFO notifier. This
patch aims to replace this specific usage and make this more generic to
be used for all upper-lower devices.

Introduce NETDEV_CHANGELOWERSTATE netdev notifier type and
netdev_lower_state_changed() helper.
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 41f0b049
...@@ -2158,6 +2158,7 @@ struct netdev_lag_upper_info { ...@@ -2158,6 +2158,7 @@ struct netdev_lag_upper_info {
#define NETDEV_CHANGEINFODATA 0x0018 #define NETDEV_CHANGEINFODATA 0x0018
#define NETDEV_BONDING_INFO 0x0019 #define NETDEV_BONDING_INFO 0x0019
#define NETDEV_PRECHANGEUPPER 0x001A #define NETDEV_PRECHANGEUPPER 0x001A
#define NETDEV_CHANGELOWERSTATE 0x001B
int register_netdevice_notifier(struct notifier_block *nb); int register_netdevice_notifier(struct notifier_block *nb);
int unregister_netdevice_notifier(struct notifier_block *nb); int unregister_netdevice_notifier(struct notifier_block *nb);
...@@ -2179,6 +2180,11 @@ struct netdev_notifier_changeupper_info { ...@@ -2179,6 +2180,11 @@ struct netdev_notifier_changeupper_info {
void *upper_info; /* upper dev info */ void *upper_info; /* upper dev info */
}; };
struct netdev_notifier_changelowerstate_info {
struct netdev_notifier_info info; /* must be first */
void *lower_state_info; /* is lower dev state */
};
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)
{ {
...@@ -3640,6 +3646,8 @@ void netdev_upper_dev_unlink(struct net_device *dev, ...@@ -3640,6 +3646,8 @@ void netdev_upper_dev_unlink(struct net_device *dev,
void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
void *netdev_lower_dev_get_private(struct net_device *dev, void *netdev_lower_dev_get_private(struct net_device *dev,
struct net_device *lower_dev); struct net_device *lower_dev);
void netdev_lower_state_changed(struct net_device *lower_dev,
void *lower_state_info);
/* RSS keys are 40 or 52 bytes long */ /* RSS keys are 40 or 52 bytes long */
#define NETDEV_RSS_KEY_LEN 52 #define NETDEV_RSS_KEY_LEN 52
......
...@@ -5756,6 +5756,26 @@ int dev_get_nest_level(struct net_device *dev, ...@@ -5756,6 +5756,26 @@ int dev_get_nest_level(struct net_device *dev,
} }
EXPORT_SYMBOL(dev_get_nest_level); EXPORT_SYMBOL(dev_get_nest_level);
/**
* netdev_lower_change - Dispatch event about lower device state change
* @lower_dev: device
* @lower_state_info: state to dispatch
*
* Send NETDEV_CHANGELOWERSTATE to netdev notifiers with info.
* The caller must hold the RTNL lock.
*/
void netdev_lower_state_changed(struct net_device *lower_dev,
void *lower_state_info)
{
struct netdev_notifier_changelowerstate_info changelowerstate_info;
ASSERT_RTNL();
changelowerstate_info.lower_state_info = lower_state_info;
call_netdevice_notifiers_info(NETDEV_CHANGELOWERSTATE, lower_dev,
&changelowerstate_info.info);
}
EXPORT_SYMBOL(netdev_lower_state_changed);
static void dev_change_rx_flags(struct net_device *dev, int flags) static void dev_change_rx_flags(struct net_device *dev, int flags)
{ {
const struct net_device_ops *ops = dev->netdev_ops; const struct net_device_ops *ops = dev->netdev_ops;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment