netdev - Re: [PATCH iproute2-next v3 0/2] f_flower: match on the number of vlan tags

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220427143200.GA23481@noodle>
Date:   Wed, 27 Apr 2022 17:32:00 +0300
From:   Boris Sukholitko <boris.sukholitko@...adcom.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org, David Ahern <dsahern@...nel.org>,
        Ilya Lifshits <ilya.lifshits@...adcom.com>,
        Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [PATCH iproute2-next v3 0/2] f_flower: match on the number of
 vlan tags

Hi Stephen,

On Tue, Apr 26, 2022 at 08:11:42AM -0700, Stephen Hemminger wrote:
> On Tue, 26 Apr 2022 12:14:15 +0300
> Boris Sukholitko <boris.sukholitko@...adcom.com> wrote:
> 
> > Hi,
> > 
> > Our customers in the fiber telecom world have network configurations
> > where they would like to control their traffic according to the number
> > of tags appearing in the packet.
> > 
> > For example, TR247 GPON conformance test suite specification mostly
> > talks about untagged, single, double tagged packets and gives lax
> > guidelines on the vlan protocol vs. number of vlan tags.
> > 
> > This is different from the common IT networks where 802.1Q and 802.1ad
> > protocols are usually describe single and double tagged packet. GPON
> > configurations that we work with have arbitrary mix the above protocols
> > and number of vlan tags in the packet.
> > 
> > The following patch series implement number of vlans flower filter. They
> > add num_of_vlans flower filter as an alternative to vlan ethtype protocol
> > matching. The end result is that the following command becomes possible:
> > 
> > tc filter add dev eth1 ingress flower \
> >   num_of_vlans 1 vlan_prio 5 action drop
> > 
> > Also, from our logs, we have redirect rules such that:
> > 
> > tc filter add dev $GPON ingress flower num_of_vlans $N \
> >      action mirred egress redirect dev $DEV
> > 
> > where N can range from 0 to 3 and $DEV is the function of $N.
> > 
> > Also there are rules setting skb mark based on the number of vlans:
> > 
> > tc filter add dev $GPON ingress flower num_of_vlans $N vlan_prio \
> >     $P action skbedit mark $M
> > 
> > Thanks,
> > Boris.
> > 
> > - v3: rebased to the latest iproute2-next
> > - v2: add missing f_flower subject prefix
> > 
> > Boris Sukholitko (2):
> >   f_flower: Add num of vlans parameter
> >   f_flower: Check args with num_of_vlans
> > 
> >  tc/f_flower.c | 57 ++++++++++++++++++++++++++++++++++++---------------
> >  1 file changed, 41 insertions(+), 16 deletions(-)
> 
> Can you do this with BPF? instead of kernel change?

You may have missed my reply to this question at:

https://lore.kernel.org/netdev/20220412104514.GB27480@noodle/

There is also Jamal's reply further at the thread:

https://lore.kernel.org/netdev/b2c83f63-a2e9-92a2-f262-3aae3491dfc3@mojatatu.com/

Thanks,
Boris.

Download attachment "smime.p7s" of type "application/pkcs7-signature" (4221 bytes)