linux-kernel - Re: [PATCH 0/6] nfsd: update the delstid patches for latest draft changes

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Message-ID: <2ed155300b60cb12758322628919c9c631744243.camel@kernel.org>
Date: Fri, 18 Oct 2024 08:05:22 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Olga Kornievskaia <aglo@...ch.edu>
Cc: Chuck Lever <chuck.lever@...cle.com>, Neil Brown <neilb@...e.de>, Olga
 Kornievskaia <okorniev@...hat.com>, Dai Ngo <Dai.Ngo@...cle.com>, Tom
 Talpey <tom@...pey.com>, Jonathan Corbet <corbet@....net>, Trond Myklebust
 <trondmy@...nel.org>, Anna Schumaker <anna@...nel.org>,  Thomas Haynes
 <loghyr@...il.com>, linux-nfs@...r.kernel.org,
 linux-kernel@...r.kernel.org,  linux-doc@...r.kernel.org
Subject: Re: [PATCH 0/6] nfsd: update the delstid patches for latest draft
 changes

On Thu, 2024-10-17 at 18:39 -0400, Olga Kornievskaia wrote:
> Seeing strangeness in a network trace with this patch series where
> SETATTR is sent with time_deleg_access and server is returning with
> EINVAL. Test is open() with read delegation, triggering a cb_recall
> via a local access. I can see that the client has changed from sending
> just a delegreturn to sending a setattr+delegreturn. Is there no
> server support and this is normal to return EINVAL.
> 

No, that's a server bug. I think it's this in nfsd4_setattr:

        if (deleg_attrs || (setattr->sa_iattr.ia_valid & ATTR_SIZE)) {
                status = nfs4_preprocess_stateid_op(rqstp, cstate,
                                &cstate->current_fh, &setattr->sa_stateid,
                                WR_STATE, NULL, &st);
                if (status)
                        return status;
        }

We're asking for a WR_STATE in the nfs4_preprocess_stateid_op, but
there isn't one. There is only a read delegation, so we get back
BAD_STATEID and that eventually runs into -EINVAL. I'll need to look
over this and figure out how to fix it properly.

Thanks for the bug report.

> On Mon, Oct 14, 2024 at 3:27 PM Jeff Layton <jlayton@...nel.org> wrote:
> > 
> > This patchset is an update to the delstid patches that went into Chuck's
> > nfsd-next branch recently. The original versions of the spec left out
> > OPEN_DELEGATE_READ_ATTRS_DELEG and OPEN_DELEGATE_WRITE_ATTRS_DELEG. This
> > set adds proper support for them.
> > 
> > My suggestion is to drop these two patches from nfsd-next:
> > 
> >     544c67cc0f26 nfsd: handle delegated timestamps in SETATTR
> >     eee2c04ca5c1 nfsd: add support for delegated timestamps
> > 
> > ...and then apply this set on top of the remaining pile. The resulting
> > set is a bit larger than the original, as I took the liberty of adding
> > some more symbols to the autogenerated part of the spec.
> > 
> > Signed-off-by: Jeff Layton <jlayton@...nel.org>
> > ---
> > Jeff Layton (6):
> >       nfsd: drop inode parameter from nfsd4_change_attribute()
> >       nfsd: switch to autogenerated definitions for open_delegation_type4
> >       nfsd: rename NFS4_SHARE_WANT_* constants to OPEN4_SHARE_ACCESS_WANT_*
> >       nfsd: prepare delegation code for handing out *_ATTRS_DELEG delegations
> >       nfsd: add support for delegated timestamps
> >       nfsd: handle delegated timestamps in SETATTR
> > 
> >  Documentation/sunrpc/xdr/nfs4_1.x    |  22 ++++-
> >  fs/nfsd/nfs4callback.c               |  42 ++++++++-
> >  fs/nfsd/nfs4proc.c                   |  26 ++++-
> >  fs/nfsd/nfs4state.c                  | 178 ++++++++++++++++++++++++++---------
> >  fs/nfsd/nfs4xdr.c                    |  57 ++++++++---
> >  fs/nfsd/nfs4xdr_gen.c                |  19 +++-
> >  fs/nfsd/nfs4xdr_gen.h                |   2 +-
> >  fs/nfsd/nfsd.h                       |   2 +
> >  fs/nfsd/nfsfh.c                      |  11 +--
> >  fs/nfsd/nfsfh.h                      |   3 +-
> >  fs/nfsd/state.h                      |  18 ++++
> >  fs/nfsd/xdr4cb.h                     |  10 +-
> >  include/linux/nfs4.h                 |   2 +-
> >  include/linux/sunrpc/xdrgen/nfs4_1.h |  35 ++++++-
> >  include/linux/time64.h               |   5 +
> >  15 files changed, 348 insertions(+), 84 deletions(-)
> > ---
> > base-commit: 9f8009c5be9367d01cd1627d6a379b4c642d8a28
> > change-id: 20241014-delstid-bf05220ad941
> > 
> > Best regards,
> > --
> > Jeff Layton <jlayton@...nel.org>
> > 
> > 

-- 
Jeff Layton <jlayton@...nel.org>