Merge tag 'nfsd-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:

- Mike Snitzer's mechanism for disabling I/O caching introduced in
v6.18 is

Merge tag 'nfsd-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd updates from Chuck Lever:

- Mike Snitzer's mechanism for disabling I/O caching introduced in
v6.18 is extended to include using direct I/O. The goal is to further
reduce the memory footprint consumed by NFS clients accessing large
data sets via NFSD.

- The NFSD community adopted a maintainer entry profile during this
cycle. See

Documentation/filesystems/nfs/nfsd-maintainer-entry-profile.rst

- Work continues on hardening NFSD's implementation of the pNFS block
layout type. This type enables pNFS clients to directly access the
underlying block devices that contain an exported file system,
reducing server overhead and increasing data throughput.

- The remaining patches are clean-ups and minor optimizations. Many
thanks to the contributors, reviewers, testers, and bug reporters who
participated during the v6.19 NFSD development cycle.

* tag 'nfsd-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (38 commits)
NFSD: nfsd-io-modes: Separate lists
NFSD: nfsd-io-modes: Wrap shell snippets in literal code blocks
NFSD: Add toctree entry for NFSD IO modes docs
NFSD: add Documentation/filesystems/nfs/nfsd-io-modes.rst
NFSD: Implement NFSD_IO_DIRECT for NFS WRITE
NFSD: Make FILE_SYNC WRITEs comply with spec
NFSD: Add trace point for SCSI fencing operation.
NFSD: use correct reservation type in nfsd4_scsi_fence_client
xdrgen: Don't generate unnecessary semicolon
xdrgen: Fix union declarations
NFSD: don't start nfsd if sv_permsocks is empty
xdrgen: handle _XdrString in union encoder/decoder
xdrgen: Fix the variable-length opaque field decoder template
xdrgen: Make the xdrgen script location-independent
xdrgen: Generalize/harden pathname construction
lockd: don't allow locking on reexported NFSv2/3
MAINTAINERS: add a nfsd blocklayout reviewer
nfsd: Use MD5 library instead of crypto_shash
nfsd: stop pretending that we cache the SEQUENCE reply.
NFS: nfsd-maintainer-entry-profile: Inline function name prefixes
...

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NFSD: nfsd-io-modes: Separate lists

Sphinx reports htmldocs indentation warnings:

Documentation/filesystems/nfs/nfsd-io-modes.rst:58: ERROR: Unexpected indentation. [docutils]
Documentation/filesys

NFSD: nfsd-io-modes: Separate lists

Sphinx reports htmldocs indentation warnings:

Documentation/filesystems/nfs/nfsd-io-modes.rst:58: ERROR: Unexpected indentation. [docutils]
Documentation/filesystems/nfs/nfsd-io-modes.rst:59: WARNING: Block quote ends without a blank line; unexpected unindent. [docutils]

These caused the lists to be shown as long running paragraphs merged
with their previous paragraphs.

Fix these by separating the lists with a blank line.

Fixes: fa8d4e6784d1b6 ("NFSD: add Documentation/filesystems/nfs/nfsd-io-modes.rst")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20251202152506.7a2d2d41@canb.auug.org.au/
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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NFSD: nfsd-io-modes: Wrap shell snippets in literal code blocks

Sphinx reports htmldocs indentation warnings:

Documentation/filesystems/nfs/nfsd-io-modes.rst:29: ERROR: Unexpected indentation. [doc

NFSD: nfsd-io-modes: Wrap shell snippets in literal code blocks

Sphinx reports htmldocs indentation warnings:

Documentation/filesystems/nfs/nfsd-io-modes.rst:29: ERROR: Unexpected indentation. [docutils]
Documentation/filesystems/nfs/nfsd-io-modes.rst:34: ERROR: Unexpected indentation. [docutils]

Fix these by wrapping shell snippets in literal code blocks.

Fixes: fa8d4e6784d1b6 ("NFSD: add Documentation/filesystems/nfs/nfsd-io-modes.rst")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/linux-next/20251202152506.7a2d2d41@canb.auug.org.au/
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

show more ...

NFSD: add Documentation/filesystems/nfs/nfsd-io-modes.rst

This document details the NFSD IO modes that are configurable using
NFSD's experimental debugfs interfaces:

/sys/kernel/debug/nfsd/io_cac

NFSD: add Documentation/filesystems/nfs/nfsd-io-modes.rst

This document details the NFSD IO modes that are configurable using
NFSD's experimental debugfs interfaces:

/sys/kernel/debug/nfsd/io_cache_read
/sys/kernel/debug/nfsd/io_cache_write

This document will evolve as NFSD's interfaces do (e.g. if/when NFSD's
debugfs interfaces are replaced with per-export controls).

Future updates will provide more specific guidance and howto
information to help others use and evaluate NFSD's IO modes:
BUFFERED, DONTCACHE and DIRECT.

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

show more ...