udf: Provide function to mark entry as deleted using new directory iteration code

Provide function udf_fiiter_delete_entry() to mark directory entry as
deleted using new directory iteration code.
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/namei.c

@@ -711,6 +711,16 @@ static struct fileIdentDesc *udf_add_entry(struct inode *dir,
 	return fi;
 }
 
+static void udf_fiiter_delete_entry(struct udf_fileident_iter *iter)
+{
+	iter->fi.fileCharacteristics |= FID_FILE_CHAR_DELETED;
+
+	if (UDF_QUERY_FLAG(iter->dir->i_sb, UDF_FLAG_STRICT))
+		memset(&iter->fi.icb, 0x00, sizeof(struct long_ad));
+
+	udf_fiiter_write_fi(iter, NULL);
+}
+
 static int udf_delete_entry(struct inode *inode, struct fileIdentDesc *fi,
 			    struct udf_fileident_bh *fibh,
 			    struct fileIdentDesc *cfi)