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Re: [PATCH v2] nbd/server: Add --selinux-label option
From: |
Eric Blake |
Subject: |
Re: [PATCH v2] nbd/server: Add --selinux-label option |
Date: |
Mon, 26 Jul 2021 09:22:54 -0500 |
User-agent: |
NeoMutt/20210205-647-5d4e008 |
On Fri, Jul 23, 2021 at 11:47:51AM +0100, Daniel P. Berrangé wrote:
> On Fri, Jul 23, 2021 at 11:33:03AM +0100, Richard W.M. Jones wrote:
> > Under SELinux, Unix domain sockets have two labels. One is on the
> > disk and can be set with commands such as chcon(1). There is a
> > different label stored in memory (called the process label). This can
> > only be set by the process creating the socket. When using SELinux +
> > SVirt and wanting qemu to be able to connect to a qemu-nbd instance,
> > you must set both labels correctly first.
> >
> > For qemu-nbd the options to set the second label are awkward. You can
> > create the socket in a wrapper program and then exec into qemu-nbd.
> > Or you could try something with LD_PRELOAD.
> >
> > This commit adds the ability to set the label straightforwardly on the
> > command line, via the new --selinux-label flag. (The name of the flag
> > is the same as the equivalent nbdkit option.)
> >
> > A worked example showing how to use the new option can be found in
> > this bug: https://bugzilla.redhat.com/show_bug.cgi?id=1984938
> >
> > Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1984938
> > Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
> > ---
> > configure | 9 ++++-
> > meson.build | 10 +++++-
> > meson_options.txt | 3 ++
> > qemu-nbd.c | 33 +++++++++++++++++++
> > tests/docker/dockerfiles/centos8.docker | 1 +
> > tests/docker/dockerfiles/fedora.docker | 1 +
> > tests/docker/dockerfiles/opensuse-leap.docker | 1 +
> > tests/docker/dockerfiles/ubuntu1804.docker | 1 +
> > tests/docker/dockerfiles/ubuntu2004.docker | 1 +
> > 9 files changed, 58 insertions(+), 2 deletions(-)
>
> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Thanks. This is a new feature, so it doesn't qualify for inclusion in
6.1, but I'm queuing it through my NBD tree to go in as soon as
upstream reopens for 6.2.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org