netdev - Re: [PATCH net-next 16/16] tipc: make netlink support net namespace

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Message-ID: <54AFDABB.3080103@cogentembedded.com>
Date:	Fri, 09 Jan 2015 16:42:19 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Ying Xue <ying.xue@...driver.com>, davem@...emloft.net
CC:	jon.maloy@...csson.com, Tero.Aho@...iant.com,
	Paul.Gortmaker@...driver.com, erik.hugne@...csson.com,
	richard.alpe@...csson.com, netdev@...r.kernel.org,
	tipc-discussion@...ts.sourceforge.net
Subject: Re: [PATCH net-next 16/16] tipc: make netlink support net namespace

Hello.

On 1/9/2015 10:27 AM, Ying Xue wrote:

> Currently tipc module only allows users sitting on "init_net" namespace
> to configure it through netlink interface. But now almost each tipc
> component is able to be aware of net namespace, so it's time to open
> the permission for users residing in other namespaces, allowing them
> to configure their own tipc stack instance through netlink interface.

> Signed-off-by: Ying Xue <ying.xue@...driver.com>
> Tested-by: Tero Aho <Tero.Aho@...iant.com>
> Reviewed-by: Jon Maloy <jon.maloy@...csson.com>
> ---
>   net/tipc/netlink.c |    7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)

> diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
> index 282b596..fe0f513 100644
> --- a/net/tipc/netlink.c
> +++ b/net/tipc/netlink.c
> @@ -54,7 +54,8 @@ static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
>   	int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
>   	u16 cmd;
>
> -	if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN)))
> +	if ((req_userhdr->cmd & 0xC000) &&
> +	    (!netlink_net_capable(skb, CAP_NET_ADMIN)))

    Why? Also, it seems like unrelated change...

[...]

WBR, Sergei

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