netdev - Re: [PATCH net-next] hv_netvsc: rework link status change handling

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Message-Id: <20151201.150359.1001330212099906860.davem@davemloft.net>
Date:	Tue, 01 Dec 2015 15:03:59 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	vkuznets@...hat.com
Cc:	netdev@...r.kernel.org, kys@...rosoft.com, haiyangz@...rosoft.com,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org
Subject: Re: [PATCH net-next] hv_netvsc: rework link status change handling

From: Vitaly Kuznetsov <vkuznets@...hat.com>
Date: Fri, 27 Nov 2015 11:39:55 +0100

> There are several issues in hv_netvsc driver with regards to link status
> change handling:
> - RNDIS_STATUS_NETWORK_CHANGE results in calling userspace helper doing
>   '/etc/init.d/network restart' and this is inappropriate and broken for
>   many reasons.
> - link_watch infrastructure only sends one notification per second and
>   in case of e.g. paired disconnect/connect events we get only one
>   notification with last status. This makes it impossible to handle such
>   situations in userspace.
> 
> Redo link status changes handling in the following way:
> - Create a list of reconfig events in network device context.
> - On a reconfig event add it to the list of events and schedule
>   netvsc_link_change().
> - In netvsc_link_change() ensure 2-second delay between link status
>   changes.
> - Handle RNDIS_STATUS_NETWORK_CHANGE as a paired disconnect/connect event.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>

Applied, thank you.
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