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Date:	Tue, 02 Mar 2010 02:08:16 +0200
From:	Oleg Kutkov <>
Subject: Notifier chains bug ?

I try to used notifier chains for monitoring network devices events.
All works perfectly when just i'm connecting/disconnecting network cable 
or up/down interface via ifconfig.
But when i try to change interface address - nothing happens. Notifier 
is don't send any events :(
There is many events in notifier.h:

#define NETDEV_UP                                        0x0001   
#define NETDEV_DOWN                                 0x0002
#define NETDEV_REBOOT                              0x0003   
#define NETDEV_CHANGE                             0x0004 
#define NETDEV_REGISTER                          0x0005
#define NETDEV_UNREGISTER                    0x0006
#define NETDEV_CHANGEMTU                    0x0007
#define NETDEV_CHANGEADDR                  0x0008
#define NETDEV_GOING_DOWN                  0x0009
#define NETDEV_CHANGENAME                 0x000A
#define NETDEV_FEAT_CHANGE                 0x000B
#define NETDEV_PRE_UP                               0x000D
#define NETDEV_BONDING_OLDTYPE        0x000E
#define NETDEV_BONDING_NEWTYPE       0x000F

So i receive only NETDEV_UP  and NETDEV_DOWN events.

Part of my code:

//event handler
static int ifEventListener(struct notifier_block *nb, unsigned long 
event, void *ptr);

//set handler
struct notifier_block nbListener =
    .notifier_call = ifEventListener

//event handler
static int ifEventListener(struct notifier_block *this, unsigned long 
event, void *ptr)
    struct net_device *dev = (struct net_device *) ptr;

    printk(KERN_INFO "eventListener() -- %d event from net_device '%s' 
(0x%08X)\n", event, dev->name, (unsigned) dev);
    return 0;

//register handler

So, this is a bug in notifier or something wrong with my code ?
Thank for any help

Best regards, 

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