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Message-Id: <20070730.170357.44097637.davem@davemloft.net>
Date: Mon, 30 Jul 2007 17:03:57 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: herbert@...dor.apana.org.au
Cc: netdev@...r.kernel.org, kaber@...sh.net
Subject: Re: [PATCH 4/6] [NET]: Allow netdev REGISTER/CHANGENAME events to
fail
From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Thu, 26 Jul 2007 17:09:36 +0800
> [NET]: Allow netdev REGISTER/CHANGENAME events to fail
>
> This patch adds code to allow errors to be passed up from event
> handlers of NETDEV_REGISTER and NETDEV_CHANGENAME. It also adds
> the notifier_from_errno/notifier_to_errnor helpers to pass the
> errno value up to the notifier caller.
>
> If an error is detected when a device is registered, it causes
> that operation to fail. A NETDEV_UNREGISTER will be sent to
> all event handlers.
>
> Similarly if NETDEV_CHANGENAME fails the original name is restored
> and a new NETDEV_CHANGENAME event is sent.
>
> As such all event handlers must be idempotent with respect to
> these events.
>
> When an event handler is registered NETDEV_REGISTER events are
> sent for all devices currently registered. Should any of them
> fail, we will send NETDEV_GOING_DOWN/NETDEV_DOWN/NETDEV_UNREGISTER
> events to that handler for the devices which have already been
> registered with it. The handler registration itself will fail.
>
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Applied.
Interesting encoding scheme :-)
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