From: Mahesh Bandewar <mah...@bandewar.net>
Date: Mon, 9 Jan 2017 15:05:54 -0800
> From: Mahesh Bandewar <mahe...@google.com>
>
> The patch 009146d117b ("ipvlan: assign unique dev-id for each slave
> device.") used ida_simple_get() to generate dev_ids assigned to the
> slave devices. However (Eric has pointed out that) there is a shortcoming
> with that approach as it always uses the first available ID. This
> becomes a problem when a slave gets deleted and a new slave gets added.
> The ID gets reassigned causing the new slave to get the same link-local
> address. This side-effect is undesirable.
>
> This patch adds a per-port variable that keeps track of the IDs
> assigned and used as the stat-base for the IDR api. This base will be
> wrapped around when it reaches the MAX (0xFFFE) value possibly on a
> busy system where slaves are added and deleted routinely.
>
> Fixes: 009146d117b ("ipvlan: assign unique dev-id for each slave device.")
> Signed-off-by: Mahesh Bandewar <mahe...@google.com>
> CC: Eric Dumazet <eduma...@google.com>
> CC: David Miller <da...@davemloft.org>
> ---
> v1 -> v2
> Implemented Dave's comments and reinstated IDR API.
Applied, thanks.
