From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: "Sriram Krishnan (srirakr2)" <srirakr2@cisco.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"xe-linux-external(mailer list)" <xe-linux-external@cisco.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Network Development <netdev@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Stephen Hemminger <sthemmin@microsoft.com>,
"Malcolm Bumgardner (mbumgard)" <mbumgard@cisco.com>
Subject: Re: [PATCH v2] AF_PACKET doesnt strip VLAN information
Date: Mon, 20 Jul 2020 09:52:27 -0400 [thread overview]
Message-ID: <CAF=yD-+gCkPVkXwcH6KiKYGV77TvpZiDo=3YyXeuGFk=TR2dcw@mail.gmail.com> (raw)
In-Reply-To: <CY4PR1101MB21013DCD55B754E29AF4A838907B0@CY4PR1101MB2101.namprd11.prod.outlook.com>
On Mon, Jul 20, 2020 at 12:27 AM Sriram Krishnan (srirakr2)
<srirakr2@cisco.com> wrote:
>
> +Stephen Hemminger
>
> Hi Willem,
> Thanks for looking into the code, I understand that this is more of a generic problem wherein many of the filtering functions assume the vlan tag to be in the skb rather than in the packet. Hence we moved the fix from the driver to the common AF packet that our solution uses.
>
> I recall from the v1 of the patch you had mentioned other common areas where this fix might be relevant (such as tap/tun), but I'm afraid I cant comprehensively test those patches out. Please let me know your thoughts
Please use plain text to respond. HTML replies do not reach the list.
Can you be more precise in which other code besides the hyper-v driver
is affected? Do you have an example?
This is a resubmit of the original patch. My previous
questions/concerns remain valid:
- if the function can now fail, all callers must be updated to detect
and handle that
- any solution should probably address all inputs into the tx path:
packet sockets, tuntap, virtio-net
- this only addresses packet sockets with ETH_P_ALL/ETH_P_NONE. Not
sockets that set ETH_P_8021Q
- which code in the transmit stack requires the tag to be in the skb,
and does this problem after this patch still persist for Q-in-Q?
next prev parent reply other threads:[~2020-07-20 13:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-18 9:17 [PATCH v2] AF_PACKET doesnt strip VLAN information Sriram Krishnan
2020-07-18 15:58 ` Willem de Bruijn
[not found] ` <CY4PR1101MB21013DCD55B754E29AF4A838907B0@CY4PR1101MB2101.namprd11.prod.outlook.com>
2020-07-20 13:52 ` Willem de Bruijn [this message]
2020-07-20 17:01 ` Sriram Krishnan (srirakr2)
2020-07-20 20:56 ` Stephen Hemminger
2020-07-20 21:22 ` Willem de Bruijn
2020-07-20 22:03 ` Stephen Hemminger
2020-07-20 23:36 ` David Miller
2020-07-19 5:16 ` kernel test robot
2020-07-19 5:16 ` kernel test robot
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