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From: Trond Myklebust <trondmy@hammerspace.com>
To: "aglo@umich.edu" <aglo@umich.edu>
Cc: "linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
	"Anna.Schumaker@netapp.com" <Anna.Schumaker@netapp.com>
Subject: Re: [PATCH v3 0/9] Various NFSv4 state error handling fixes
Date: Sat, 21 Sep 2019 04:11:10 +0000
Message-ID: <a2395c752a9c711ecfc54aebbbf6cade790a53e3.camel@hammerspace.com> (raw)
In-Reply-To: <CAN-5tyGGtASKYC2a+Y01Qr-qBBOT+ybAEokxQdZAyASpEYO+4A@mail.gmail.com>

Hi Olga

On Fri, 2019-09-20 at 17:01 -0400, Olga Kornievskaia wrote:
> Hi Trond,
> 
> This version works for me. I went back to v2 and verified that it
> didn't work so whatever you did here fixed it for me.
> 

That has me a little confused because I can't really see how the lack
of spinlocks could cause incorrect behaviour that consistently, however
I'm fine with the result. ☺

Thanks for the help with testing!

Trond

> On Fri, Sep 20, 2019 at 7:26 AM Trond Myklebust <trondmy@gmail.com>
> wrote:
> > Various NFSv4 fixes to ensure we handle state errors correctly. In
> > particular, we need to ensure that for COMPOUNDs like CLOSE and
> > DELEGRETURN, that may have an embedded LAYOUTRETURN, we handle the
> > layout state errors so that a retry of either the LAYOUTRETURN, or
> > the later CLOSE/DELEGRETURN does not corrupt the LAYOUTRETURN
> > reply.
> > 
> > Also ensure that if we get a NFS4ERR_OLD_STATEID, then we do our
> > best to still try to destroy the state on the server, in order to
> > avoid causing state leakage.
> > 
> > v2: Fix bug reports from Olga
> >  - Try to avoid sending old stateids on CLOSE/OPEN_DOWNGRADE when
> >    doing fully serialised NFSv4.0.
> >  - Ensure LOCKU initialises the stateid correctly.
> > v3: Fix locking
> >  - Ensure the patch "Handle NFS4ERR_OLD_STATEID in LOCKU" locks the
> >    stateid when copying it in nfs4_alloc_unlockdata().
> > 
> > Trond Myklebust (9):
> >   pNFS: Ensure we do clear the return-on-close layout stateid on
> > fatal
> >     errors
> >   NFSv4: Clean up pNFS return-on-close error handling
> >   NFSv4: Handle NFS4ERR_DELAY correctly in return-on-close
> >   NFSv4: Handle RPC level errors in LAYOUTRETURN
> >   NFSv4: Add a helper to increment stateid seqids
> >   pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the
> > state
> >     seqid
> >   NFSv4: Fix OPEN_DOWNGRADE error handling
> >   NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE
> >   NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU
> > 
> >  fs/nfs/nfs4_fs.h   |  11 ++-
> >  fs/nfs/nfs4proc.c  | 209 +++++++++++++++++++++++++++++++--------
> > ------
> >  fs/nfs/nfs4state.c |  16 ----
> >  fs/nfs/pnfs.c      |  71 +++++++++++++--
> >  fs/nfs/pnfs.h      |  17 +++-
> >  5 files changed, 233 insertions(+), 91 deletions(-)
> > 
> > --
> > 2.21.0
> > 
-- 
Trond Myklebust
Linux NFS client maintainer, Hammerspace
trond.myklebust@hammerspace.com



      reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-20 11:23 Trond Myklebust
2019-09-20 11:23 ` [PATCH v3 1/9] pNFS: Ensure we do clear the return-on-close layout stateid on fatal errors Trond Myklebust
2019-09-20 11:23   ` [PATCH v3 2/9] NFSv4: Clean up pNFS return-on-close error handling Trond Myklebust
2019-09-20 11:23     ` [PATCH v3 3/9] NFSv4: Handle NFS4ERR_DELAY correctly in return-on-close Trond Myklebust
2019-09-20 11:23       ` [PATCH v3 4/9] NFSv4: Handle RPC level errors in LAYOUTRETURN Trond Myklebust
2019-09-20 11:23         ` [PATCH v3 5/9] NFSv4: Add a helper to increment stateid seqids Trond Myklebust
2019-09-20 11:23           ` [PATCH v3 6/9] pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the state seqid Trond Myklebust
2019-09-20 11:23             ` [PATCH v3 7/9] NFSv4: Fix OPEN_DOWNGRADE error handling Trond Myklebust
2019-09-20 11:23               ` [PATCH v3 8/9] NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE Trond Myklebust
2019-09-20 11:23                 ` [PATCH v3 9/9] NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU Trond Myklebust
2019-09-20 21:01 ` [PATCH v3 0/9] Various NFSv4 state error handling fixes Olga Kornievskaia
2019-09-21  4:11   ` Trond Myklebust [this message]

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