On Mon, Nov 24, 2008 at 20:45, Stephen Hemminger <shemminger@xxxxxxxxxx> wrote:
> It is easier for some applications to deal with text based interfaces
> like uevent, rather than using netlink to listen for events.
>
> Note, this does not deal with network namespaces but that is a generic
> problem that already exists with kobjects (see rename events).
>
> Signed-off-by: Stephen Hemminger <shemminger@xxxxxxxxxx>
>
> ---
> net/core/Makefile | 1
> net/core/uevent.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 62 insertions(+)
>
> --- a/net/core/Makefile 2008-11-24 08:40:10.000000000 -0800
> +++ b/net/core/Makefile 2008-11-24 08:51:01.000000000 -0800
> @@ -17,3 +17,4 @@ obj-$(CONFIG_NET_PKTGEN) += pktgen.o
> obj-$(CONFIG_NETPOLL) += netpoll.o
> obj-$(CONFIG_NET_DMA) += user_dma.o
> obj-$(CONFIG_FIB_RULES) += fib_rules.o
> +obj-$(CONFIG_HOTPLUG) += uevent.o
> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
> +++ b/net/core/uevent.c 2008-11-24 09:06:50.000000000 -0800
> @@ -0,0 +1,60 @@
> +/*
> + * Linux network device event notification
> + *
> + * Author:
> + * Stephen Hemminger <shemminger@xxxxxxxxxx>
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/netdevice.h>
> +#include <linux/kobject.h>
> +#include <linux/notifier.h>
> +
> +/*
> + * Generate uevent in response to nework device changes.
> + * NB: KOBJ_MOVE is already genereated by kobject_rename
> + */
> +static int netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
> +{
> + struct net_device *netdev = ptr;
> +
> + switch (event) {
> + case NETDEV_UNREGISTER:
> + kobject_uevent(&netdev->dev.kobj, KOBJ_REMOVE);
> + break;
> + case NETDEV_REGISTER:
> + kobject_uevent(&netdev->dev.kobj, KOBJ_ADD);
> + break;
Did you do anything else to prevent the duplicated add/remove events?
The core does send these already. I replied with a "udevadm monitor"
output to your earlier mail. Don't you see the duplicates on your box?
Thanks,
Kay
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