From 20747a2a29c6a7ccc54fd3f3159bcfe86a0dae6e Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@kernel.org>
Date: Thu, 8 Jan 2026 12:13:01 -0500
Subject: [PATCH] ext4: add setlease file operation

Add the setlease file_operation to ext4_file_operations and
ext4_dir_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-v1-6-ea4dec9b67fa@kernel.org
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 fs/ext4/dir.c  | 2 ++
 fs/ext4/file.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index 256fe2c1d4c16..00c4b3c82b653 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -24,6 +24,7 @@
 
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
+#include <linux/filelock.h>
 #include <linux/slab.h>
 #include <linux/iversion.h>
 #include <linux/unicode.h>
@@ -690,4 +691,5 @@ const struct file_operations ext4_dir_operations = {
 #endif
 	.fsync		= ext4_sync_file,
 	.release	= ext4_release_dir,
+	.setlease	= generic_setlease,
 };
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 7a8b309321892..534cf864101f8 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -25,6 +25,7 @@
 #include <linux/mount.h>
 #include <linux/path.h>
 #include <linux/dax.h>
+#include <linux/filelock.h>
 #include <linux/quotaops.h>
 #include <linux/pagevec.h>
 #include <linux/uio.h>
@@ -980,6 +981,7 @@ const struct file_operations ext4_file_operations = {
 	.fop_flags	= FOP_MMAP_SYNC | FOP_BUFFER_RASYNC |
 			  FOP_DIO_PARALLEL_WRITE |
 			  FOP_DONTCACHE,
+	.setlease	= generic_setlease,
 };
 
 const struct inode_operations ext4_file_inode_operations = {
-- 
2.47.3