Re: [Virtio-fs] [PATCH] virtiofsd: Error on bad socket group name

[Dr. David Alan Gilbert]

* Vivek Goyal (vgoyal@redhat.com) wrote:
> On Thu, Oct 14, 2021 at 01:25:54PM +0100, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> > 
> > Make the '--socket-group=' option fail if the group name is unknown:
> > 
> > ./tools/virtiofsd/virtiofsd .... --socket-group=zaphod
> > vhost socket: unable to find group 'zaphod'
> > 
> > Reported-by: Xiaoling Gao <xiagao@redhat.com>
> > Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> 
> Hi Dave,
> 
> This looks good to me. Just a minor nit for code cleanup. It could
> be done in a separate patch or sometime later as well.
> 
> Reviewed-by: Vivek Goyal <vgoyal@redhat.com>

Thanks

> > ---
> >  tools/virtiofsd/fuse_virtio.c | 7 +++++++
> >  1 file changed, 7 insertions(+)
> > 
> > diff --git a/tools/virtiofsd/fuse_virtio.c b/tools/virtiofsd/fuse_virtio.c
> > index 8f4fd165b9..39eebffb62 100644
> > --- a/tools/virtiofsd/fuse_virtio.c
> > +++ b/tools/virtiofsd/fuse_virtio.c
> > @@ -999,6 +999,13 @@ static int fv_create_listen_socket(struct fuse_session 
> > *se)
> >                           "vhost socket failed to set group to %s (%d): 
> > %m\n",
> >                           se->vu_socket_group, g->gr_gid);
> >              }
> > +        } else {
> > +            fuse_log(FUSE_LOG_ERR,
> > +                     "vhost socket: unable to find group '%s'\n",
> > +                     se->vu_socket_group);
> > +            close(listen_sock);
> > +            umask(old_umask);
>               ^^^
> > +            return -1;
> >          }
> >      }
> >      umask(old_umask);
> 
> This umask() call could be moved little early right after bind() call and
> that way we don't have to take care of calling umask(old_umask) in error
> path if group name could not be found.

One to fight another day.

> Vivek
> > -- 
> > 2.31.1
> > 
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> > 
> 
> 
-- 
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK