[net-2.6] packet : remove init_net restriction

The af_packet protocol is used by Perl to do ioctls as reported by
Stephane Riviere:

"Net::RawIP relies on SIOCGIFADDR et SIOCGIFHWADDR to get the IP and MAC
addresses of the network interface."

But in a new network namespace these ioctl fail because it is disabled for
a namespace different from the init_net_ns.

These two lines should not be there as af_inet and af_packet are
namespace aware since a long time now. I suppose we forget to remove these
lines because we sent the af_packet first, before af_inet was supported.

Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Reported-by: Stephane Riviere <stephane.riviere@regis-dgac.net>
---
 net/packet/af_packet.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

Daniel Lezcano wrote:
> The af_packet protocol is used by Perl to do ioctls as reported by
> Stephane Riviere:
>
> "Net::RawIP relies on SIOCGIFADDR et SIOCGIFHWADDR to get the IP and MAC
> addresses of the network interface."
>
> But in a new network namespace these ioctl fail because it is disabled for
> a namespace different from the init_net_ns.
>
> These two lines should not be there as af_inet and af_packet are
> namespace aware since a long time now. I suppose we forget to remove these
> lines because we sent the af_packet first, before af_inet was supported.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
> Reported-by: Stephane Riviere <stephane.riviere@regis-dgac.net>
> ---
>  net/packet/af_packet.c |    2 --
>  1 files changed, 0 insertions(+), 2 deletions(-)
>
> diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
> index cc90363..243946d 100644
> --- a/net/packet/af_packet.c
> +++ b/net/packet/af_packet.c
> @@ -2169,8 +2169,6 @@ static int packet_ioctl(struct socket *sock, unsigned int cmd,
>  	case SIOCGIFDSTADDR:
>  	case SIOCSIFDSTADDR:
>  	case SIOCSIFFLAGS:
> -		if (!net_eq(sock_net(sk), &init_net))
> -			return -ENOIOCTLCMD;
>  		return inet_dgram_ops.ioctl(sock, cmd, arg);
>  #endif
>  
>   
Shall I send it against net-next-2.6 ?

Thanks
  -- Daniel
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From: Daniel Lezcano <daniel.lezcano@free.fr>
Date: Fri, 16 Apr 2010 17:04:28 +0200

> Shall I send it against net-next-2.6 ?

No, I'll likely add it to net-2.6, I just haven't gotten around
to it yet.

Thanks.
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From: Daniel Lezcano <daniel.lezcano@free.fr>
Date: Thu, 15 Apr 2010 11:11:14 +0200

> The af_packet protocol is used by Perl to do ioctls as reported by
> Stephane Riviere:
> 
> "Net::RawIP relies on SIOCGIFADDR et SIOCGIFHWADDR to get the IP and MAC
> addresses of the network interface."
> 
> But in a new network namespace these ioctl fail because it is disabled for
> a namespace different from the init_net_ns.
> 
> These two lines should not be there as af_inet and af_packet are
> namespace aware since a long time now. I suppose we forget to remove these
> lines because we sent the af_packet first, before af_inet was supported.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
> Reported-by: Stephane Riviere <stephane.riviere@regis-dgac.net>

Applied, thanks!
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