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-next>] [day] [month] [year] [list]
Date:   Fri, 30 Mar 2018 13:46:17 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     netdev@...r.kernel.org
Cc:     roopa@...ulusnetworks.com, davem@...emloft.net,
        makita.toshiaki@....ntt.co.jp, 3chas3@...il.com,
        stephen@...workplumber.org, bridge@...ts.linux-foundation.org,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: [PATCH net-next 0/2] net: bridge: MTU handling changes

Hi,
As previously discussed the recent changes break some setups and could lead
to packet drops. Thus the first patch reverts the behaviour for the bridge
to follow the minimum MTU but also keeps the ability to set the MTU to the
maximum (out of all ports) if vlan filtering is enabled. Patch 02 is the
bigger change in behaviour - we've always had trouble when configuring
bridges and their MTU which is auto tuning on port events
(add/del/changemtu), which means config software needs to chase it and fix
it after each such event, after patch 02 we allow the user to configure any
MTU (ETH_MIN/MAX limited) but once that is done the bridge stops auto
tuning and relies on the user to keep the MTU correct.
This should be compatible with cases that don't touch the MTU (or set it
to the same value), while allowing to configure the MTU and not worry
about it changing afterwards.

The patches are intentionally split like this, so that if they get accepted
and there are any complaints patch 02 can be reverted.

Thanks,
 Nik

Nikolay Aleksandrov (2):
  net: bridge: set min MTU on port events and allow user to set max
  net: bridge: disable bridge MTU auto tuning if it was set manually

 net/bridge/br.c         |  2 +-
 net/bridge/br_device.c  |  4 ++--
 net/bridge/br_if.c      | 49 ++++++++++++++++++++-----------------------------
 net/bridge/br_private.h |  3 ++-
 4 files changed, 25 insertions(+), 33 deletions(-)

-- 
2.11.0

Powered by blists - more mailing lists