linux-kernel - [PATCH v3 net-next 0/2] net: openvswitch: metering and conntrack in userns

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Message-Id: <20220923133820.993725-1-michael.weiss@aisec.fraunhofer.de>
Date:   Fri, 23 Sep 2022 15:38:18 +0200
From:   Michael Weiß <michael.weiss@...ec.fraunhofer.de>
To:     Paolo Abeni <pabeni@...hat.com>, Pravin B Shelar <pshelar@....org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Joe Stringer <joe@...ium.io>, Andy Zhou <azhou@....org>,
        Michael Weiß <michael.weiss@...ec.fraunhofer.de>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        dev@...nvswitch.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 net-next 0/2] net: openvswitch: metering and conntrack in userns

Currently using openvswitch in a non-initial user namespace, e.g., an
unprivileged container, is possible but without metering and conntrack
support. This is due to the restriction of the corresponding Netlink
interfaces to the global CAP_NET_ADMIN.

This simple patches switch from GENL_ADMIN_PERM to GENL_UNS_ADMIN_PERM
in several cases to allow this also for the unprivileged container
use case.

We tested this for unprivileged containers created by the container
manager of GyroidOS (gyroidos.github.io). However, for other container
managers such as LXC or systemd which provide unprivileged containers
this should be apply equally.

Changes in v3:
- also changed GFP_KERNEL to GFP_KERNEL_ACCOUNT in
  ovs_ct_limit_set_zone_limit() as suggested by Jakub
- Rebased on net-next/main branch of networking tree

Changes in v2:
- changed GFP_KERNEL to GFP_KERNEL_ACCOUNT in dp_meter_create()
  as suggested by Paolo
- Rebased on net branch of networking tree

Michael Weiß (2):
  net: openvswitch: allow metering in non-initial user namespace
  net: openvswitch: allow conntrack in non-initial user namespace

 net/openvswitch/conntrack.c | 13 ++++++++-----
 net/openvswitch/meter.c     | 14 +++++++-------
 2 files changed, 15 insertions(+), 12 deletions(-)

base-commit: 3aba35bb201fd2481b3fd5794120d9d1b0734fe8
-- 
2.30.2