From: Stephen Hemminger <shemminger@linux-foundation.org>
To: Dave Johnson <djohnson+linux-kernel@sw.starentnetworks.com>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Bin Guo <bguo@sw.starentnetworks.com>
Subject: Re: expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device?
Date: Wed, 31 Oct 2007 12:33:59 -0700 [thread overview]
Message-ID: <20071031123359.3954befc@freepuppy.rosehill> (raw)
In-Reply-To: <18216.52455.698606.497464@zeus.sw.starentnetworks.com>
On Wed, 31 Oct 2007 14:43:51 -0400
Dave Johnson <djohnson+linux-kernel@sw.starentnetworks.com> wrote:
>
> Depending on the network driver, I'm seeing different behavior if
> a .1q packet is received to an PF_PACKET, SOCK_RAW, ETH_P_ALL socket.
>
>
> On devices what do not use NETIF_F_HW_VLAN_RX, the packet socket gets
> the complete packet with vlan tag included as the driver simply calls
> netif_receive_skb() or equivilant. packet_rcv() then gets the whole
> thing vlan tag included and sends this through the socket.
>
> vlan_skb_recv() also gets these all and will drop them because there
> are no vlans configured.
>
The VLAN acceleration grabs and hides the tag. It is a design flaw
that should be fixed, feel free to post a patch.
--
Stephen Hemminger <shemminger@linux-foundation.org>
next prev parent reply other threads:[~2007-10-31 19:33 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-31 18:43 expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device? Dave Johnson
2007-10-31 19:33 ` Stephen Hemminger [this message]
2007-11-01 1:06 ` Ben Greear
2007-11-01 1:10 ` David Miller
2007-11-01 1:23 ` Stephen Hemminger
2007-11-01 1:31 ` Ben Greear
2007-11-01 4:50 ` David Miller
2007-11-01 15:04 ` Ben Greear
2007-11-01 21:35 ` David Miller
2007-11-01 21:36 ` Dave Johnson
2007-11-01 21:48 ` Rick Jones
2007-11-01 21:59 ` David Miller
2007-11-01 22:04 ` Rick Jones
2007-11-01 22:07 ` David Miller
2007-11-01 23:26 ` Rick Jones
2007-11-05 17:46 ` [PATCH 1/2] NET: Re-add VLAN tag for devices incapable of keeping it Dave Johnson
2007-11-05 18:00 ` Patrick McHardy
2007-11-05 23:15 ` David Miller
2007-11-06 0:21 ` Patrick McHardy
2007-11-06 0:35 ` David Miller
2007-11-06 18:03 ` Krzysztof Halasa
2007-11-06 18:56 ` Ben Greear
2007-11-06 20:08 ` Krzysztof Halasa
2007-11-06 23:55 ` Patrick McHardy
2007-11-05 17:47 ` [PATCH 2/2] " Dave Johnson
2007-11-06 2:39 ` Ramkrishna Vepa
2007-11-06 18:28 ` Ramkrishna Vepa
2007-11-06 18:34 ` Dave Johnson
2007-11-01 21:58 ` expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device? David Miller
2007-11-02 18:08 ` Dave Johnson
2007-11-02 21:20 ` David Miller
2007-11-02 21:52 ` Michael Chan
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