[CRIU] [PATCH 01/12] images: add a network namespace id into images

[Pavel Emelyanov]

On 03/01/2017 02:52 AM, Andrei Vagin wrote:
> From: Andrei Vagin <avagin at virtuozzo.com>
> 
> It is possible to assign id for network namespaces and
> this id will be used by the kernel in some netlink messages.
> If no id is assigned when the kernel needs it, it will be
> automatically assigned by the kernel.
> 
> For example, this id is reported for peer veth devices.
> 
> Signed-off-by: Andrei Vagin <avagin at virtuozzo.com>
> ---
>  images/netdev.proto | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/images/netdev.proto b/images/netdev.proto
> index 2f2f3d1..5bf39ef 100644
> --- a/images/netdev.proto
> +++ b/images/netdev.proto
> @@ -42,6 +42,14 @@ message net_device_entry {
>  	repeated sysctl_entry conf6	= 10;
>  
>  	optional macvlan_link_entry	macvlan		= 11;
> +
> +	optional uint32 peer_ifindex	= 12;
> +	optional uint32 peer_nsid	= 13;
> +}
> +
> +message netns_id {
> +	required uint32	id	= 1;
> +	required int32	nsid	= 2;

Would you explain why netns_id has two integers and why one of
them can be negative?

>  }
>  
>  message netns_entry {
> @@ -53,4 +61,6 @@ message netns_entry {
>  
>  	repeated sysctl_entry def_conf6	= 5;
>  	repeated sysctl_entry all_conf6	= 6;
> +
> +	repeated netns_id nsids		= 7;
>  }
>