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net/core: Add event for a change in slave state

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Add event which provides an indication on a change in the state
of a bonding slave. The event handler should cast the pointer to the
appropriate type (struct netdev_bonding_info) in order to get the
full info about the slave.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Moni Shoua 2015-02-03 16:48:29 +02:00 committed by David S. Miller
parent 251c005a64
commit 61bd3857ff
3 changed files with 36 additions and 0 deletions
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15
include/linux/netdevice.h
View file

@ -51,6 +51,7 @@
#include <linux/netdev_features.h>
#include <linux/neighbour.h>
#include <uapi/linux/netdevice.h>
#include <uapi/linux/if_bonding.h>
struct netpoll_info;
struct device;
@ -2056,6 +2057,7 @@ struct pcpu_sw_netstats {
#define NETDEV_RESEND_IGMP 0x0016
#define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
#define NETDEV_CHANGEINFODATA 0x0018
#define NETDEV_BONDING_INFO 0x0019
int register_netdevice_notifier(struct notifier_block *nb);
int unregister_netdevice_notifier(struct notifier_block *nb);
@ -3494,6 +3496,19 @@ struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
netdev_features_t features);
struct netdev_bonding_info {
ifslave slave;
ifbond master;
};
struct netdev_notifier_bonding_info {
struct netdev_notifier_info info; /* must be first */
struct netdev_bonding_info bonding_info;
};
void netdev_bonding_info_change(struct net_device *dev,
struct netdev_bonding_info *bonding_info);
static inline
struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
{

20
net/core/dev.c
View file

@ -5355,6 +5355,26 @@ void netdev_upper_dev_unlink(struct net_device *dev,
}
EXPORT_SYMBOL(netdev_upper_dev_unlink);
/**
* netdev_bonding_info_change - Dispatch event about slave change
* @dev: device
* @netdev_bonding_info: info to dispatch
*
* Send NETDEV_BONDING_INFO to netdev notifiers with info.
* The caller must hold the RTNL lock.
*/
void netdev_bonding_info_change(struct net_device *dev,
struct netdev_bonding_info *bonding_info)
{
struct netdev_notifier_bonding_info info;
memcpy(&info.bonding_info, bonding_info,
sizeof(struct netdev_bonding_info));
call_netdevice_notifiers_info(NETDEV_BONDING_INFO, dev,
&info.info);
}
EXPORT_SYMBOL(netdev_bonding_info_change);
void netdev_adjacent_add_links(struct net_device *dev)
{
struct netdev_adjacent *iter;

1
net/core/rtnetlink.c
View file

@ -3180,6 +3180,7 @@ static int rtnetlink_event(struct notifier_block *this, unsigned long event, voi
case NETDEV_UNREGISTER_FINAL:
case NETDEV_RELEASE:
case NETDEV_JOIN:
case NETDEV_BONDING_INFO:
break;
default:
rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL);