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From: trondmy@gmail.com
To: linux-nfs@vger.kernel.org
Subject: [PATCH 00/11] LAYOUTRETURN on reboot
Date: Thu, 13 Jun 2024 01:00:44 -0400
Message-ID: <20240613050055.854323-1-trond.myklebust@hammerspace.com>
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From: Trond Myklebust <trond.myklebust@hammerspace.com>

Now that https://datatracker.ietf.org/doc/draft-ietf-nfsv4-layrec/ is
mostly done with the review process, I'd like to move the final patches
for the client implementation upstream.

The following patch series therefore adds support to the flexfiles pNFS
driver so that if a metadata server reboot occurs while a client has
layouts outstanding, and is performing I/O, then the client will report
layoutstats and layout errors through a LAYOUTRETURN during the grace
period, after the metadata server comes back up.
This has implications for mirrored workloads, since it allows the client
to report exactly which mirror data instances may have been corrupted
due to the presence of errors during WRITEs or COMMITs.

Trond Myklebust (11):
  NFSv4/pnfs: Remove redundant list check
  NFSv4.1: constify the stateid argument in nfs41_test_stateid()
  NFSv4: Clean up encode_nfs4_stateid()
  pNFS: Add a flag argument to pnfs_destroy_layouts_byclid()
  NFSv4/pnfs: Add support for the PNFS_LAYOUT_FILE_BULK_RETURN flag
  NFSv4/pNFS: Add a helper to defer failed layoutreturn calls
  NFSv4/pNFS: Handle server reboots in pnfs_poc_release()
  NFSv4/pNFS: Retry the layout return later in case of a timeout or
    reboot
  NFSv4/pnfs: Give nfs4_proc_layoutreturn() a flags argument
  NFSv4/pNFS: Remove redundant call to unhash the layout
  NFSv4/pNFS: Do layout state recovery upon reboot

 fs/nfs/callback_proc.c                 |   5 +-
 fs/nfs/flexfilelayout/flexfilelayout.c |   2 +-
 fs/nfs/nfs4_fs.h                       |   3 +-
 fs/nfs/nfs4proc.c                      |  53 ++++--
 fs/nfs/nfs4state.c                     |   4 +-
 fs/nfs/nfs4xdr.c                       |   7 +-
 fs/nfs/pnfs.c                          | 223 +++++++++++++++++++------
 fs/nfs/pnfs.h                          |  30 +++-
 include/linux/nfs_fs_sb.h              |   1 +
 include/linux/nfs_xdr.h                |   2 +-
 10 files changed, 249 insertions(+), 81 deletions(-)

-- 
2.45.2