Re: [PATCH net-next 06/10] vxlan: use __dev_get_by_index instead ofdev_get_by_index to find interface

[Stephen Hemminger]

On Tue, 14 Jan 2014 15:41:05 +0800
Ying Xue <ying.xue@xxxxxxxxxxxxx> wrote:

> The following call chains indicate that vxlan_fdb_parse() is
> under rtnl_lock protection. So if we use __dev_get_by_index()
> instead of dev_get_by_index() to find interface handler in it,
> this would help us avoid to change interface reference counter.
> 
> rtnetlink_rcv()
>   rtnl_lock()
>   netlink_rcv_skb()
>     rtnl_fdb_add()
>       vxlan_fdb_add()
>         vxlan_fdb_parse()
>   rtnl_unlock()
> 
> rtnetlink_rcv()
>   rtnl_lock()
>   netlink_rcv_skb()
>     rtnl_fdb_del()
>       vxlan_fdb_del()
>         vxlan_fdb_parse()
>   rtnl_unlock()
> 
> Cc: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Ying Xue <ying.xue@xxxxxxxxxxxxx>

Acked-by: Stephen Hemminger <stephen@xxxxxxxxxxxxxxxxxx>
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