NFSv4: After upgrade to 9 users can no longer list files. (sounds like a ZFS issue?)

Rick Macklem rmacklem at uoguelph.ca
Tue Aug 30 15:10:27 UTC 2011


George Liaskos wrote:
> > Well, if non-root users can't "ls" locally on the server, this
> > sounds more
> > like a ZFS issue than an NFS one. (I don't see this w.r.t. NFS when
> > exporting
> > a UFS volume.)
> >
> > I don't know anything about ZFS. I've added a couple of the ZFS guys
> > to the
> > cc list, in case they don't read posts with NFS in the subject line.
> >
> > rick
> 
> Just to be clear, non root users can't ls mounted exports on the
> server.
> Using ls directly on the ZFS file system works.
> 
> I exported a UFS directory, everything works... So this is either a
> ZFS or
> an ACL related issue. I will setup a clean VM to see if i can
> reproduce this.
> 
You could try this patch and see what effect it has (applied to the
server). It just disables the access check for readdir.
--- nfs_nfsdport.c.sav2	2011-08-30 10:35:58.000000000 -0400
+++ nfs_nfsdport.c	2011-08-30 10:36:54.000000000 -0400
@@ -1838,10 +1838,12 @@ nfsrvd_readdirplus(struct nfsrv_descript
 		nd->nd_repstat = NFSERR_NOTDIR;
 	if (!nd->nd_repstat && cnt == 0)
 		nd->nd_repstat = NFSERR_TOOSMALL;
+#ifdef notnow
 	if (!nd->nd_repstat)
 		nd->nd_repstat = nfsvno_accchk(vp, VEXEC,
 		    nd->nd_cred, exp, p, NFSACCCHK_NOOVERRIDE,
 		    NFSACCCHK_VPISLOCKED, NULL);
+#endif
 	if (nd->nd_repstat) {
 		vput(vp);
 		if (nd->nd_flag & ND_NFSV3)

This wouldn't be suitable for a production system, but whether or
not it "fixes" the problem would give us an indication of where the
problem is.

Also, if you could clarify when your 8/stable was downloaded, whether
your 9.0 upgrade was to vanilla Beta1 or ??? and details w.r.t. your
ZFS setup, that might help.

And one more... If you could create a fresh ZFS pool/volume and export
that to see if it exhibits the same problem, that information could
help figure it out, too.

Please let us know how it goes, rick

> Thank you for your response.
> 
> Regards,
> George


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