Re: [fuse-devel] fuse_get_context() and namespaces

[Seth Forshee]

On Fri, May 22, 2015 at 04:23:55PM +0200, Miklos Szeredi wrote:
> On Sat, May 2, 2015 at 5:56 PM,  <alexey@xxxxxxxxxxxxxxx> wrote:
> >
> > 3.10.0-229 form Scientific Linux and native 4.0.1-1 (from elrepo).
> > SL 7.1 on the host and SL 6.6 on the LXC guest. At least in 3.10
> > the 499dcf2024092e5cce41d05599a5b51d1f92031a is present.
> > Steps to reproduce:
> >
> > On first console:
> > [root@sl7test ~]# lxc-start  -n test-2 /bin/su -
> > [root@test-2 ~]# diff -u  hello.py /usr/share/doc/fuse-python-0.2.1/example/hello.py
> > --- hello.py    2015-05-02 11:12:13.963093580 -0400
> > +++ /usr/share/doc/fuse-python-0.2.1/example/hello.py   2010-04-14 18:29:21.000000000 -0400
> > @@ -41,8 +41,6 @@
> >  class HelloFS(Fuse):
> >
> >      def getattr(self, path):
> > -        dic = Fuse.GetContext(self)
> > -        print dic
> >          st = MyStat()
> >          if path == '/':
> >              st.st_mode = stat.S_IFDIR | 0755
> > [root@test-2 ~]# python hello.py -f  /mnt/
> >
> > On second console:
> > [root@test-2 ~]# echo $$
> > 41
> > [root@test-2 ~]# ls /mnt/
> > hello
> >
> > Output of first console:
> > {'gid': 0, 'pid': 12083, 'uid': 0}
> 
> Thanks.
> 
> Digging in mailbox...  There was a thread last year about adding
> support for running fuse daemon in a container:
> 
>   http://thread.gmane.org/gmane.linux.kernel/1811658
> 
> Not sure what happened, but no updated patches have been posted or
> maybe I just missed them.

I haven't sent updated patches in a while. I still intend to, but I
shifted focus to first getting general support for mounts from user
namespaces into the vfs (which will give a clearer direction for some of
the concerns raised about the fuse patches).

All of this code is available in the userns-mounts branch of
git://kernel.ubuntu.com/sforshee/linux.git, and I don't think the fuse
patches actually depend on any of the stuff that precedes them. I'm
planning to start submitting some of the earlier patches from that
branch soon, and eventually get back to resubmitting the fuse patches.

This is about pid namespaces though, and the fuse pid namespace patch
from that series (see below) should be more or less independent of the
rest of the patches. Potentially that could be merged separately from
the user namespae stuff.

Seth

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