[PATCH v10 0/5] NFSD: Implement NFSD_IO_DIRECT for NFS WRITE

[Chuck Lever <cel@kernel.org>]

From: Chuck Lever <chuck.lever@oracle.com>

Following on https://lore.kernel.org/linux-nfs/aPAci7O_XK1ljaum@kernel.org/
this series includes the patches needed to make NFSD Direct WRITE
operational.

As requested by several reviewers, I've combined all the review
patches into a single patch. I've removed R-b's for the resulting
patches.

The series compiles and passes static analysis checks but still
needs functional and performance testing.


Changes since v9:
* Unaligned segments no longer use IOCB_DONTCACHE
* Squashed all review patches into Mike's initial patch
* Squashed Mike's documentation update into the final patch

Changes since v8:
* Drop "NFSD: Handle both offset and memory alignment for direct I/O"
* Include the Sep 3 version of the Documentation update

Changes since v7:
* Rebase the series on Mike's original v3 patch
* Address more review comments
* Optimize the "when can NFSD use IOCB_DIRECT" logic
* Revert the "always promote to FILE_SYNC" logic

Changes since v6:
* Patches to address review comments have been split out
* Refactored the iter initialization code

Changes since v5:
* Add a patch to make FILE_SYNC WRITEs persist timestamps
* Address some of Christoph's review comments
* The svcrdma patch has been dropped until we actually need it

Changes since v4:
* Split out refactoring nfsd_buffered_write() into a separate patch
* Expand patch description of 1/4
* Don't set IOCB_SYNC flag

Changes since v3:
* Address checkpatch.pl nits in 2/3
* Add an untested patch to mark ingress RDMA Read chunks

Chuck Lever (2):
  NFSD: Make FILE_SYNC WRITEs comply with spec
  NFSD: Enable return of an updated stable_how to NFS clients

Mike Snitzer (2):
  NFSD: Implement NFSD_IO_DIRECT for NFS WRITE
  NFSD: add Documentation/filesystems/nfs/nfsd-io-modes.rst

Olga Kornievskaia (1):
  NFSD: don't start nfsd if sv_permsocks is empty

 .../filesystems/nfs/nfsd-io-modes.rst         | 150 ++++++++++++++
 fs/nfsd/debugfs.c                             |   1 +
 fs/nfsd/nfs3proc.c                            |   2 +-
 fs/nfsd/nfs4proc.c                            |   2 +-
 fs/nfsd/nfsproc.c                             |   3 +-
 fs/nfsd/nfssvc.c                              |  28 +--
 fs/nfsd/trace.h                               |   1 +
 fs/nfsd/vfs.c                                 | 195 +++++++++++++++++-
 fs/nfsd/vfs.h                                 |   6 +-
 fs/nfsd/xdr3.h                                |   2 +-
 10 files changed, 350 insertions(+), 40 deletions(-)
 create mode 100644 Documentation/filesystems/nfs/nfsd-io-modes.rst

-- 
2.51.0