Notifier chains bug ?
in [Kernel]
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From: Oleg Kutkov on 1 Mar 2010 19:10 Hello. 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_BONDING_FAILOVER 0x000C #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 register_netdevice_notifier(&nbListener); So, this is a bug in notifier or something wrong with my code ? Thank for any help -- Best regards, Oleg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Américo Wang on 1 Mar 2010 22:30 On Tue, Mar 2, 2010 at 8:08 AM, Oleg Kutkov <elenbert(a)gmail.com> wrote: > Hello. > 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 :( I think you mean IP address? No, NETDEV_CHANGEADDR is for hardware address, not for IP address. If you were changing mac address, you will receive NETDEV_CHANGEADDR. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Oleg Kutkov on 2 Mar 2010 01:00 2010/3/2 Am�rico Wang <xiyou.wangcong(a)gmail.com>: > On Tue, Mar 2, 2010 at 8:08 AM, Oleg Kutkov <elenbert(a)gmail.com> wrote: >> Hello. >> 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 :( > > I think you mean IP address? No, NETDEV_CHANGEADDR is for hardware > address, not for IP address. > > If you were changing mac address, you will receive NETDEV_CHANGEADDR. > Thank for quick answer. Yes, i mean IP address. And what about NETDEV_CHANGE ? Is there possible for monitoring IP address/netmask changing ? Thank. -- Best regards, Oleg -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Américo Wang on 2 Mar 2010 10:50 On Tue, Mar 02, 2010 at 07:50:01AM +0200, Oleg Kutkov wrote: >2010/3/2 Américo Wang <xiyou.wangcong(a)gmail.com>: >> On Tue, Mar 2, 2010 at 8:08 AM, Oleg Kutkov <elenbert(a)gmail.com> wrote: >>> Hello. >>> 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 :( >> >> I think you mean IP address? No, NETDEV_CHANGEADDR is for hardware >> address, not for IP address. >> >> If you were changing mac address, you will receive NETDEV_CHANGEADDR. >> > >Thank for quick answer. >Yes, i mean IP address. And what about NETDEV_CHANGE ? It is for rtnetlink state transition. >Is there possible for monitoring IP address/netmask changing ? > AFAIK, no. Cc'ing netdev experts... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Américo Wang on 4 Mar 2010 05:10
On Tue, Mar 2, 2010 at 11:55 PM, Atis Elsts <atis.elsts(a)gmail.com> wrote: > I'm no expert, but IMHO for handling IP address changes you should use > function register_inetaddr_notifier() to register you callback and > then wait for NETDEV_UP and NETDEV_DOWN events. > Oh, I think you are right. Btw, please don't drop Cc's. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |