linux-kernel - [PATCH 0/2] filelock: fix conflict detection with userland file delegations

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Message-Id: <20251201-dir-deleg-ro-v1-0-2e32cf2df9b7@kernel.org>
Date: Mon, 01 Dec 2025 10:08:18 -0500
From: Jeff Layton <jlayton@...nel.org>
To: Alexander Viro <viro@...iv.linux.org.uk>, 
 Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>, 
 Chuck Lever <chuck.lever@...cle.com>, 
 Alexander Aring <alex.aring@...il.com>, 
 "Matthew Wilcox (Oracle)" <willy@...radead.org>, 
 Jonathan Corbet <corbet@....net>, NeilBrown <neil@...wn.name>, 
 Olga Kornievskaia <okorniev@...hat.com>, Dai Ngo <Dai.Ngo@...cle.com>, 
 Tom Talpey <tom@...pey.com>
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-doc@...r.kernel.org, linux-nfs@...r.kernel.org, 
 Jeff Layton <jlayton@...nel.org>
Subject: [PATCH 0/2] filelock: fix conflict detection with userland file
 delegations

This patchset fixes the way that conflicts are detected when userland
requests file delegations. The problem is due to a hack that was added
long ago which worked up until userland could request a file delegation.

This fixes the bug and makes things a bit less hacky. Please consider
for v6.19.

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
Jeff Layton (2):
      filelock: add lease_dispose_list() helper
      filelock: allow lease_managers to dictate what qualifies as a conflict

 Documentation/filesystems/locking.rst |   1 +
 fs/locks.c                            | 119 +++++++++++++++++-----------------
 fs/nfsd/nfs4layouts.c                 |  11 +++-
 fs/nfsd/nfs4state.c                   |   7 ++
 include/linux/filelock.h              |   1 +
 5 files changed, 79 insertions(+), 60 deletions(-)
---
base-commit: 76c63ff12e067e1ff77b19a83c24774899ed01fc
change-id: 20251201-dir-deleg-ro-41a16bc22838

Best regards,
-- 
Jeff Layton <jlayton@...nel.org>