From 2bbbadbe9288af946944d9fd8f9267707873efd3 Mon Sep 17 00:00:00 2001
From: shangdehao1 <dehao.shang@intel.com>
Date: Fri, 19 Apr 2019 08:19:13 +0800
Subject: [PATCH] librbd: don't append zeros for RO caching reading

Just return actual contents.

Signed-off-by: Dehao Shang <dehao.shang@intel.com>
---
 src/librbd/cache/SharedPersistentObjectCacher.cc | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/src/librbd/cache/SharedPersistentObjectCacher.cc b/src/librbd/cache/SharedPersistentObjectCacher.cc
index 79a549aab71..ac0bbf50969 100644
--- a/src/librbd/cache/SharedPersistentObjectCacher.cc
+++ b/src/librbd/cache/SharedPersistentObjectCacher.cc
@@ -42,15 +42,7 @@ int SharedPersistentObjectCacher<I>::read_object(std::string file_path,
                   << dendl;
     return ret;
   }
-
-  if (read_data->length() != length) {
-    ceph_assert(ret < length);
-    read_data->append("0", length - read_data->length());
-  }
-
-  ceph_assert(read_data->length() == length);
-
-  return length;
+  return read_data->length();
 }
 
 
-- 
2.39.5