Re: [PATCH] net: add support for netdev notifier error injection

[David Miller]

From: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>
Date: Sat, 28 Nov 2015 13:45:28 +0100

> From: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
> 
> This module allows to insert errors in some of netdevice's notifier
> events. All network drivers use these notifiers to signal various events
> and to check if they are allowed, e.g. PRECHANGEMTU and CHANGEMTU
> afterwards. Until recently I had to run failure tests by injecting
> a custom module, but now this infrastructure makes it trivial to test
> these failure paths. Some of the recent bugs I fixed were found using
> this module.
> Here's an example:
>  $ cd /sys/kernel/debug/notifier-error-inject/netdev
>  $ echo -22 > actions/NETDEV_CHANGEMTU/error
>  $ ip link set eth0 mtu 1024
>  RTNETLINK answers: Invalid argument
> 
> CC: Akinobu Mita <akinobu.mita@xxxxxxxxx>
> CC: "David S. Miller" <davem@xxxxxxxxxxxxx>
> CC: netdev <netdev@xxxxxxxxxxxxxxx>
> Signed-off-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>

This looks fine, applied to net-next, thanks!
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