udf: add setlease file operation

Add the setlease file_operation pointing to generic_setlease to the udf
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-v1-20-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>

Author: jtlayton

fs/udf/dir.c

@@ -24,6 +24,7 @@
 
 #include <linux/string.h>
 #include <linux/errno.h>
+#include <linux/filelock.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
 #include <linux/bio.h>
@@ -157,4 +158,5 @@ const struct file_operations udf_dir_operations = {
 	.iterate_shared		= udf_readdir,
 	.unlocked_ioctl		= udf_ioctl,
 	.fsync			= generic_file_fsync,
+	.setlease		= generic_setlease,
 };

fs/udf/file.c

@@ -28,6 +28,7 @@
 #include <linux/string.h> /* memset */
 #include <linux/capability.h>
 #include <linux/errno.h>
+#include <linux/filelock.h>
 #include <linux/pagemap.h>
 #include <linux/uio.h>
 
@@ -208,6 +209,7 @@ const struct file_operations udf_file_operations = {
 	.splice_read		= filemap_splice_read,
 	.splice_write		= iter_file_splice_write,
 	.llseek			= generic_file_llseek,
+	.setlease		= generic_setlease,
 };
 
 static int udf_setattr(struct mnt_idmap *idmap, struct dentry *dentry,