Date: Fri, 19 Feb 2010 11:24:34 -0500 (EST) From: Rick Macklem <rmacklem@uoguelph.ca> To: George Mamalakis <mamalos@eng.auth.gr> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: mountd segfaults in NFSv4 if -alldirs is present in exports Message-ID: <Pine.GSO.4.63.1002191115330.24826@muncher.cs.uoguelph.ca> In-Reply-To: <4B7EB1E5.3080907@eng.auth.gr> References: <4B7EB1E5.3080907@eng.auth.gr>
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On Fri, 19 Feb 2010, George Mamalakis wrote: > Hi all, > > the title explains it all... > > But ok, let's be a bit more extensive. > > If I have one line in /etc/exports reading: > > V4: / -alldirs > > and try to start mountd, it segfaults with signal 11. From the manpage I read > that -alldirs is the "second method" used to export a filesystem and V4 is > the "third", maybe implying that they are mutually exclusive. Nevertheless, I > suppose that mountd shouldn't segfault in my case, it could just refuse to > start giving an error message or something. I've tried a different > /etc/exports containing a dummy option -dummy instead of -alldirs and mountd > won't segfault, hence there's no problem with its parser. > The "V4:" line does not export a file system. It only specifies where the "root" is for NFSv4 and what clients/security flavours are supported for the NFSv4 lock state Ops that aren't associated with any file handle is. (There can be multiple V4: lines for different hosts, but they should differ in their "-sec" specification and only that.) The file systems must still be exported by separate lines, just like NFSv2,3. It happens that "-alldirs" always applies to NFSv4, since it does not use the Mount protocol and can mount anything under the "root" that has been exported. As such, "-sec" plus the ones related to specifying host(s) "-network, -mask" are the only ones that should be in the "V4:" line(s). But, of course it shouldn't segfault. I'll put that on my to do list. Thanks for reporting it, rick
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