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From: "NeilBrown" <neilb@suse.de>
To: "Dan Shelton" <dan.f.shelton@gmail.com>
Cc: "Linux NFS Mailing List" <linux-nfs@vger.kernel.org>
Subject: Re: kernel update to 6.8.2 broke idmapd group mapping
In-reply-to:
 <CAAvCNcDahJvPdhFj=WYBHKUVPVz+oCZcXeqVXhT3s8b6B0kiEA@mail.gmail.com>
References:
 <CAAvCNcCDsAcZFoCuCgM_HrooSTjr5T9aQ2s_LC_81XUzVetwqw@mail.gmail.com>,
 <CAAvCNcDahJvPdhFj=WYBHKUVPVz+oCZcXeqVXhT3s8b6B0kiEA@mail.gmail.com>
Date: Fri, 26 Apr 2024 14:22:30 +1000
Message-id: <171410535095.7600.9392086332005098557@noble.neil.brown.name>

On Fri, 26 Apr 2024, Dan Shelton wrote:
> On Sat, 30 Mar 2024 at 12:56, Dan Shelton <dan.f.shelton@gmail.com> wrote:
> >
> > Hello!
> >
> > I have updated my Debian 11 with the Linux 6.8.2 kernel, running
> > rpc.nfsd with various NFSV4 clients.

Update to 6.8.2 from ... what?
There are no nfsd changes between 6.8 and 6.8.2.

I assume you only change the server - none of the NFS clients were
changed?

Can you use "tcpdump -s 0 ...." to capture network traffic while this is
happening?  That might provide some hints.

NeilBrown


> > Userland stayed exactly the same, so neither idmapd or nfs-utils were cha=
nged.
> >
> > But I now see lots of weird group names (not usernames, they are
> > normal) from idmapd, but not all group name mappings are affected:
> > Mar 28 19:15:18 ingramnode86 rpc.idmapd[400]: nfsdcb:
> > authbuf=3D*,10.2.66.30 authtype=3Dgroup
> > Mar 28 19:15:18 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > calling nsswitch->name_to_gid
> > Mar 28 19:15:18 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > nsswitch->name_to_gid returned -22
> > Mar 28 19:15:18 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid: final
> > return value is -22
> > Mar 28 19:15:18 ingramnode86 rpc.idmapd[400]: Server : (group) name
> > "^PM-!M-?M-4q" -> id "65534"
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfsdcb:
> > authbuf=3D*,10.2.66.30 authtype=3Dgroup
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > calling nsswitch->name_to_gid
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > nsswitch->name_to_gid returned -22
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid: final
> > return value is -22
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: Server : (group) name
> > "PM-^^M-^OM-4q" -> id "65534"
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfsdcb:
> > authbuf=3D*,10.2.66.30 authtype=3Dgroup
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > calling nsswitch->name_to_gid
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > nsswitch->name_to_gid returned -22
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid: final
> > return value is -22
> > Mar 28 19:15:19 ingramnode86 rpc.idmapd[400]: Server : (group) name
> > "M-^PM-^]/M-4q" -> id "65534"
> > Mar 28 19:15:20 ingramnode86 rpc.idmapd[400]: nfsdcb:
> > authbuf=3D*,10.2.66.30 authtype=3Dgroup
> > Mar 28 19:15:20 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > calling nsswitch->name_to_gid
> > Mar 28 19:15:20 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid:
> > nsswitch->name_to_gid returned -22
> > Mar 28 19:15:20 ingramnode86 rpc.idmapd[400]: nfs4_name_to_gid: final
> > return value is -22
> > Mar 28 19:15:20 ingramnode86 rpc.idmapd[400]: Server : (group) name
> > "M- M- M-^_M-4q" -> id "65534"
>=20
> Help?
>=20
> Dan
> --=20
> Dan Shelton - Cluster Specialist Win/Lin/Bsd
>=20
>=20