[Pkg-samba-maint] Bug#695533: Bug#695533: cifs-utils: mount.cifs errors on mount option _netdev

[Steve Langasek]

severity 695533 minor
thanks

On Mon, Dec 10, 2012 at 10:01:50AM +1300, Hugh Davenport wrote:
> Package: cifs-utils
> Version: 2:4.5-2+squeeze1
> Severity: important

> >From mount(8), under "FILESYSTEM INDEPENDENT MOUNT OPTIONS"
> there is a mount option "_netdev" which is meant to require
> the network to be up before attempting to mount. Full description
> is below.

> When the system is booted, I get the following in my error log:

>  Dec 10 09:42:03 fir kernel: [   21.068520] CIFS: Unknown mount option _netdev
>  Dec 10 09:42:03 fir kernel: [   21.116416]  CIFS VFS: Error connecting to socket. Aborting operation
>  Dec 10 09:42:03 fir kernel: [   21.116423]  CIFS VFS: cifs_mount failed w/return code = -111
>  Dec 10 09:42:03 fir kernel: [   21.116459] CIFS: Unknown mount option _netdev

> The filesystem is not mounted. Once I get a shell, I can `mount -a`
> and the mount comes up correctly.

> This has worked on mount.nfs, but not on mount.cifs. A bit of
> googling found the following bug report in redhat that has been
> resolved.

I think this "filesystem-independent mount option" is supposed to be parsed
out by mount itself, not passed to mount.cifs.  I don't know why that isn't
happening, but I suspect this is a util-linux bug.

However, there's no reason for you to set _netdev at all here.  The boot
infrastructure knows that cifs is a network filesystem, and that *all* cifs
mounts must wait for the network; so specifying a mount option is redundant. 
The _netdev option is meant to be used when the filesystem is of a local
type, but the *underlying block device* requires the network to be up before
it's available (e.g., aoe, nbd, iscsi).

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
Ubuntu Developer                                    http://www.debian.org/
slangasek at ubuntu.com                                     vorlon at debian.org
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