GNU bug report logs - #39670
Cannot mount NFS share as user or root

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#39670: closed (Cannot mount NFS share as user or root)
Date: Thu, 01 Oct 2020 19:48:02 +0000

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Your message dated Thu, 01 Oct 2020 15:49:04 -0400
with message-id <87ft6xohfz.fsf <at> gmail.com>
and subject line Re: bug#39670: Cannot mount NFS share as user or root
has caused the debbugs.gnu.org bug report #39670,
regarding Cannot mount NFS share as user or root
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Nathan Dehnel <ncdehnel <at> gmail.com>
Cc: bug-guix <at> gnu.org
Subject: Re: Cannot mount NFS share as user or root
Date: Tue, 18 Feb 2020 16:33:51 -0500

Hello Nathan,

Nathan Dehnel <ncdehnel <at> gmail.com> writes:

> bash-5.0$ mount /media/store
> mount: /media/store: bad option; for several filesystems (e.g. nfs,
> cifs) you might need a /sbin/mount.<type> helper program
>
> /etc/config.scm:
>
> (file-system
>              (mount-point "/media/store")
>              (device "gentooserver:/")
>              (type "nfs4")
>              (mount? #f)
>              (create-mount-point? #t)
>              (options "rw,_netdev,noauto,user,lazytime,exec,tcp"))
>
> /etc/fstab:
>
> gentooserver:/ /media/store nfs4 rw,_netdev,noauto,user,lazytime,exec,tcp
>
> nfs-utils is installed:
>
> bash-5.0$ guix package -i nfs-utils
> The following package will be upgraded:
>    nfs-utils 2.4.2 → 2.4.2
> /gnu/store/chmbpkh0gvvmdhgwjw7rpl63f99mv7i6-nfs-utils-2.4.2
>
> nothing to be done

I encountered this too.  Perhaps we should patch some references to
mount.nfs (from nfs-utils) in the util-linux package which provides
'mount'.

In the meantime, you should use "mount.nfs" directly.

I'm opening an issue to track progress on this.

Thank you,

Maxim

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: Nathan Dehnel <ncdehnel <at> gmail.com>
Cc: 39670-done <at> debbugs.gnu.org
Subject: Re: bug#39670: Cannot mount NFS share as user or root
Date: Thu, 01 Oct 2020 15:49:04 -0400

Hi!

> Nathan Dehnel <ncdehnel <at> gmail.com> writes:
>
>> Right, but it's more inconvenient than just clicking the share in thunar
>> and it mounting. Actually, I can't mount it without doing "sudo" first,
>> despite having the "user" fstab flag set. This actually might be a separate
>> issue, but I'm not sure.
>
> That's a good point.  We should try to make this simpler.  The mount.nfs
> binary needs to be setuid root to allow unprivileged users to mount NFS
> file systems.  Unfortunately, the mount command (which we already define
> as setuid-root) only looked for helpers under /run/current/profile/sbin.
> This is now fixed in commit def6e2ae4619587114383b3f8fd9f3cf8310b4b9
> (which had to be made on core-updates).
>

[...]

> I've sent a patch for review which proposes to add these setuid-root binaries for
> desktop users out-of-the-box on Guix System, which only adds about 4 MiB
> to the almost 3 GiB closure of the lightweight-desktop.tmpl system [0].
>
> As mentioned before, it depends on a change to util-linux that had to be
> made on the core-updates branch, so it won't be usable until the next
> core-updates merge.

This patch has now been merged with commit d40c9f6c85.

Closing!

Thank you,

Maxim

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