From: Ben Greear <greearb@candelatech.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "David Miller" <davem@davemloft.net>,
"Jiri Pirko" <jpirko@redhat.com>,
"Nicolas de Pesloüan" <nicolas.2p.debian@gmail.com>,
"Changli Gao" <xiaosuo@gmail.com>,
netdev@vger.kernel.org, shemminger@linux-foundation.org,
kaber@trash.net, fubar@us.ibm.com, eric.dumazet@gmail.com,
andy@greyhouse.net, "Jesse Gross" <jesse@nicira.com>
Subject: Re: [PATCH 1/3] vlan: Do not support clearing VLAN_FLAG_REORDER_HDR
Date: Sun, 22 May 2011 14:04:04 -0700 [thread overview]
Message-ID: <4DD97A44.2020708@candelatech.com> (raw)
In-Reply-To: <m1ei3qjzix.fsf_-_@fess.ebiederm.org>
On 05/22/2011 12:39 PM, Eric W. Biederman wrote:
>
> Simplify the vlan handling code by not supporing clearing of
> VLAN_FLAG_REORDER_HDR. Which means we always make the vlan handling
> code strip the vlan header from the packets, and always insert the vlan
> header when transmitting packets.
>
> Not stripping the vlan header has alwasy been broken in combination with
> vlan hardware accelleration. Now that we are making everything look
> like accelerated vlan handling not stripping the vlan header is always
> broken.
>
> I don't think anyone actually cares so simply stop supporting the broken
> case.
I've lost track of the VLAN code a bit. Is there any documentation
somewhere about what happens in these various cases:
* Open a raw packet socket on eth0.
* Do we get tagged VLAN packets? (I'd expect yes.)
* If we sent a tagged VLAN packet, it's sent without modification? (I'd expect yes.)
** Without "yes" to the two above, one cannot do user-space bridging properly.
* Open a raw packet socket on VLAN eth0.5
* Do we get tagged VLAN packets? (I'd expect no.)
* If we send an un-tagged packet, I expect it would be tagged?
* What if we sent a tagged packet with same VID?
* With different VID?
Many years ago we supported the REORDER, but we suggested disabling
it for most users because it was a performance drag. Funny that now
it seems to be the opposite!
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
next prev parent reply other threads:[~2011-05-22 21:04 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-08 5:48 [patch net-next-2.6 v2] net: vlan: make non-hw-accel rx path similar to hw-accel Jiri Pirko
2011-04-12 21:16 ` David Miller
2011-05-21 1:11 ` Changli Gao
2011-05-21 7:29 ` Jiri Pirko
2011-05-21 10:43 ` Changli Gao
2011-05-21 13:17 ` Nicolas de Pesloüan
2011-05-21 17:54 ` Jesse Gross
2011-05-21 22:15 ` Stephen Hemminger
2011-05-22 2:59 ` Nicolas de Pesloüan
2011-05-22 6:29 ` Jiri Pirko
2011-05-22 6:34 ` Eric W. Biederman
2011-05-22 8:34 ` Nicolas de Pesloüan
2011-05-22 8:52 ` Michał Mirosław
2011-05-22 9:10 ` Nicolas de Pesloüan
2011-05-22 9:20 ` Michał Mirosław
2011-05-22 9:36 ` Jiri Pirko
2011-05-22 9:53 ` Nicolas de Pesloüan
2011-05-22 10:04 ` Michał Mirosław
2011-05-22 16:11 ` Jesse Gross
2011-05-22 18:24 ` Eric W. Biederman
2011-05-22 19:33 ` Eric W. Biederman
2011-05-22 19:39 ` [PATCH 1/3] vlan: Do not support clearing VLAN_FLAG_REORDER_HDR Eric W. Biederman
2011-05-22 19:40 ` [PATCH 2/3] vlan: Always strip the vlan header in vlan_untag Eric W. Biederman
2011-05-22 19:42 ` [PATCH 3/3] vlan: Simplify the code now that VLAN_FLAG_REORDER_HDR is always set Eric W. Biederman
2011-06-09 10:59 ` Jiri Pirko
2011-06-12 6:17 ` Eric W. Biederman
2011-05-22 21:04 ` Ben Greear [this message]
2011-05-22 22:38 ` [PATCH 1/3] vlan: Do not support clearing VLAN_FLAG_REORDER_HDR Eric W. Biederman
2011-05-23 0:38 ` Changli Gao
2011-05-23 1:26 ` Changli Gao
2011-05-23 1:45 ` Eric W. Biederman
2011-05-23 2:14 ` Changli Gao
2011-05-23 9:41 ` Eric W. Biederman
2011-05-23 10:43 ` Jiri Pirko
2011-05-23 19:48 ` Nicolas de Pesloüan
2011-05-24 5:58 ` Jiri Pirko
2011-05-24 7:19 ` Nicolas de Pesloüan
2011-05-23 1:39 ` Eric W. Biederman
2011-05-23 6:01 ` Ben Greear
2011-05-23 9:00 ` Eric W. Biederman
2011-05-23 16:33 ` Ben Greear
2011-05-23 19:36 ` Nicolas de Pesloüan
2011-05-23 20:24 ` Ben Greear
2011-05-23 21:00 ` Stephen Hemminger
2011-05-23 21:20 ` David Miller
2011-05-23 22:05 ` Eric W. Biederman
2011-05-23 22:16 ` Stephen Hemminger
2011-05-23 22:48 ` Eric W. Biederman
2011-05-23 22:23 ` Ben Greear
2011-05-23 23:02 ` Eric W. Biederman
2011-05-24 4:20 ` Ben Greear
2011-05-24 7:11 ` Nicolas de Pesloüan
2011-05-24 7:44 ` Michał Mirosław
2011-05-24 15:17 ` Ben Greear
2011-05-24 5:19 ` David Miller
2011-05-24 7:56 ` Eric W. Biederman
2011-05-24 15:44 ` Ben Greear
2011-05-24 0:11 ` [PATCH] vlan: Fix the b0rked ingress VLAN_FLAG_REORDER_HDR check Eric W. Biederman
2011-05-24 4:54 ` David Miller
2011-05-24 6:18 ` Eric W. Biederman
2011-05-24 6:24 ` David Miller
2011-05-24 7:38 ` Eric W. Biederman
2011-06-02 3:59 ` David Miller
2011-06-02 13:03 ` [PATCH] vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check v2 Eric W. Biederman
2011-06-02 13:15 ` Jiri Pirko
2011-06-02 14:54 ` Changli Gao
2011-06-02 15:26 ` Eric W. Biederman
2011-06-02 23:18 ` Changli Gao
2011-06-06 14:48 ` Jiri Pirko
2011-06-03 3:34 ` padmanabh ratnakar
2011-06-03 3:59 ` Changli Gao
2011-06-05 21:14 ` David Miller
2011-06-10 8:35 ` [PATCH v3] vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check Jiri Pirko
2011-06-10 9:26 ` Changli Gao
2011-06-10 9:34 ` Jiri Pirko
2011-06-10 9:49 ` Changli Gao
2011-06-10 10:35 ` Jiri Pirko
2011-06-10 11:20 ` Changli Gao
2011-06-10 12:12 ` Jiri Pirko
2011-06-10 16:56 ` Jiri Pirko
2011-06-11 0:05 ` Changli Gao
2011-06-11 23:16 ` David Miller
2011-06-08 16:28 ` [PATCH] vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check v2 Jiri Pirko
2011-06-08 23:08 ` Changli Gao
2011-06-09 6:01 ` Jiri Pirko
2011-06-09 11:00 ` [PATCH 1/3] vlan: Do not support clearing VLAN_FLAG_REORDER_HDR Jiri Pirko
2011-05-22 8:38 ` [patch net-next-2.6 v2] net: vlan: make non-hw-accel rx path similar to hw-accel Changli Gao
2011-05-22 9:37 ` Jiri Pirko
2011-05-22 10:17 ` Changli Gao
2011-05-22 10:26 ` Eric W. Biederman
2011-05-22 10:40 ` Changli Gao
2011-05-22 13:16 ` Jiri Pirko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4DD97A44.2020708@candelatech.com \
--to=greearb@candelatech.com \
--cc=andy@greyhouse.net \
--cc=davem@davemloft.net \
--cc=ebiederm@xmission.com \
--cc=eric.dumazet@gmail.com \
--cc=fubar@us.ibm.com \
--cc=jesse@nicira.com \
--cc=jpirko@redhat.com \
--cc=kaber@trash.net \
--cc=netdev@vger.kernel.org \
--cc=nicolas.2p.debian@gmail.com \
--cc=shemminger@linux-foundation.org \
--cc=xiaosuo@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.