fuse: add setlease file operation

Add the setlease file_operation to fuse_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/20260112130121.25965-1-jlayton@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: jtlayton

fs/fuse/file.c

@@ -3177,6 +3177,7 @@ static const struct file_operations fuse_file_operations = {
 	.poll		= fuse_file_poll,
 	.fallocate	= fuse_file_fallocate,
 	.copy_file_range = fuse_copy_file_range,
+	.setlease	= generic_setlease,
 };
 
 static const struct address_space_operations fuse_file_aops  = {