Date: Thu, 14 May 2015 09:24:25 -0400 (EDT) From: Rick Macklem <rmacklem@uoguelph.ca> To: Edward Tomasz =?utf-8?Q?Napiera=C5=82a?= <trasz@FreeBSD.org> Cc: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Re: RFC: should automounted file systems be exportable? Message-ID: <1693868675.37887047.1431609865698.JavaMail.root@uoguelph.ca> In-Reply-To: <20150512074602.GA93864@brick.home>
next in thread | previous in thread | raw e-mail | index | archive | help
------=_Part_37887045_646449297.1431609865694
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Edward Tomasz Napierala wrote:
> On 0511T2217, Rick Macklem wrote:
> > A recent bug was reported related to mountd and the
> > "automounted" flag.
> >
> > Loosely related to this is the question...
> > Should automounted file systems be exportable?
> >
> > I haven't tested it, but I suspect that it would be
> > broken and the NFS server will reply NFSERR_STALE
> > after the file system has been dismounted.
> >
> > So, should I patch mountd so that it won't export
> > automounted file systems?
>
> Exporting an automounted filesystem doesn't seem to make much sense,
> I agree, but I'm not sure if adding code to prevent it is such
> a good idea. If the user asks for it, by putting it into exports(5),
> it's his fault; the only thing this code could add would be a more
> friendly error message.
>
>
So, how about having mountd generate a warning message in syslog(),
but allow it to proceed?
(Untested patch for this is attached.)
rick
ps: One other person emailed me suggesting that it should be doable and
no one emailed that it should be restricted, so I figure that the "vote"
favours a warning.
------=_Part_37887045_646449297.1431609865694
Content-Type: text/x-patch; name=mountd-automount.patch
Content-Disposition: attachment; filename=mountd-automount.patch
Content-Transfer-Encoding: base64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------=_Part_37887045_646449297.1431609865694--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1693868675.37887047.1431609865698.JavaMail.root>