ufs: add setlease file operation

Add the setlease file_operation pointing to generic_setlease to the ufs
file_operations structures. 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-v1-21-ea4dec9b67fa@kernel.org
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: jtlayton

fs/ufs/dir.c

@@ -19,6 +19,7 @@
 
 #include <linux/time.h>
 #include <linux/fs.h>
+#include <linux/filelock.h>
 #include <linux/swap.h>
 #include <linux/iversion.h>
 
@@ -653,4 +654,5 @@ const struct file_operations ufs_dir_operations = {
 	.iterate_shared	= ufs_readdir,
 	.fsync		= generic_file_fsync,
 	.llseek		= ufs_dir_llseek,
+	.setlease	= generic_setlease,
 };

fs/ufs/file.c

@@ -25,6 +25,7 @@
  */
 
 #include <linux/fs.h>
+#include <linux/filelock.h>
 
 #include "ufs_fs.h"
 #include "ufs.h"
@@ -43,4 +44,5 @@ const struct file_operations ufs_file_operations = {
 	.fsync		= generic_file_fsync,
 	.splice_read	= filemap_splice_read,
 	.splice_write	= iter_file_splice_write,
+	.setlease	= generic_setlease,
 };