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From:   Trond Myklebust <trondmy@gmail.com>
To:     Anna Schumaker <Anna.Schumaker@netapp.com>
Cc:     Olga Kornievskaia <aglo@umich.edu>, linux-nfs@vger.kernel.org
Subject: [PATCH v3 0/9] Various NFSv4 state error handling fixes
Date:   Fri, 20 Sep 2019 07:23:39 -0400
Message-Id: <20190920112348.69496-1-trond.myklebust@hammerspace.com>
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Sender: linux-nfs-owner@vger.kernel.org
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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