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net/core: add NETDEV_BONDING_FAILOVER event 

Add NETDEV_BONDING_FAILOVER event to be used in a successive patch
by bonding to announce fail-over for the active-backup mode through the
netdev events notifier chain mechanism. Such an event can be of use for the
RDMA CM (communication manager) to let native RDMA ULPs (eg NFS-RDMA, iSER)
always be aligned with the IP stack, in the sense that they use the same
ports/links as the stack does. More usages can be done to allow monitoring
tools based on netlink events being aware to bonding fail-over.

Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
wifi-calibration
Or Gerlitz 2008-06-13 18:12:00 -07:00 committed by Jeff Garzik
parent 743d32ad36
commit c1da4ac752
3 changed files with 8 additions and 0 deletions
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1
include/linux/netdevice.h
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@ -1479,6 +1479,7 @@ extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct
extern void dev_set_promiscuity(struct net_device *dev, int inc);
extern void dev_set_allmulti(struct net_device *dev, int inc);
extern void netdev_state_change(struct net_device *dev);
extern void netdev_bonding_change(struct net_device *dev);
extern void netdev_features_change(struct net_device *dev);
/* Load a device via the kmod */
extern void dev_load(struct net *net, const char *name);

1
include/linux/notifier.h
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@ -197,6 +197,7 @@ static inline int notifier_to_errno(int ret)
#define NETDEV_GOING_DOWN 0x0009
#define NETDEV_CHANGENAME 0x000A
#define NETDEV_FEAT_CHANGE 0x000B
#define NETDEV_BONDING_FAILOVER 0x000C
#define SYS_DOWN 0x0001 /* Notify of system down */
#define SYS_RESTART SYS_DOWN

6
net/core/dev.c
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@ -961,6 +961,12 @@ void netdev_state_change(struct net_device *dev)
}
}
void netdev_bonding_change(struct net_device *dev)
{
call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, dev);
}
EXPORT_SYMBOL(netdev_bonding_change);
/**
* dev_load - load a network module
* @net: the applicable net namespace