From f9688474e413f607f1a4e047d970b50dc268c84c Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@kernel.org>
Date: Thu, 8 Jan 2026 12:12:58 -0500
Subject: [PATCH] btrfs: add setlease file operation

Add the setlease file_operation to btrfs_file_operations and
btrfs_dir_file_operations, pointing to generic_setlease.  A future
patch will change the default behavior to reject lease attempts with
-EINVAL when there is no setlease file operation defined. Add
generic_setlease to retain the ability to set leases on this
filesystem.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://patch.msgid.link/20260108-setlease-6-20-v1-3-ea4dec9b67fa@kernel.org
Acked-by: David Sterba <dsterba@suse.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 fs/btrfs/file.c  | 2 ++
 fs/btrfs/inode.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 1abc7ed2990e0..aca2b541e72df 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -10,6 +10,7 @@
 #include <linux/string.h>
 #include <linux/backing-dev.h>
 #include <linux/falloc.h>
+#include <linux/filelock.h>
 #include <linux/writeback.h>
 #include <linux/compat.h>
 #include <linux/slab.h>
@@ -3867,6 +3868,7 @@ const struct file_operations btrfs_file_operations = {
 	.remap_file_range = btrfs_remap_file_range,
 	.uring_cmd	= btrfs_uring_cmd,
 	.fop_flags	= FOP_BUFFER_RASYNC | FOP_BUFFER_WASYNC,
+	.setlease	= generic_setlease,
 };
 
 int btrfs_fdatawrite_range(struct btrfs_inode *inode, loff_t start, loff_t end)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index d2b302ac6af96..d377794b4c9fa 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8,6 +8,7 @@
 #include <linux/bio.h>
 #include <linux/blk-cgroup.h>
 #include <linux/file.h>
+#include <linux/filelock.h>
 #include <linux/fs.h>
 #include <linux/fs_struct.h>
 #include <linux/pagemap.h>
@@ -10596,6 +10597,7 @@ static const struct file_operations btrfs_dir_file_operations = {
 #endif
 	.release        = btrfs_release_file,
 	.fsync		= btrfs_sync_file,
+	.setlease	= generic_setlease,
 };
 
 /*
-- 
2.47.3