From: shangdehao1 <dehao.shang@intel.com>
Date: Fri, 19 Apr 2019 00:19:13 +0000 (+0800)
Subject: librbd: don't append zeros for RO caching reading
X-Git-Tag: v15.1.0~2379^2~20
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=2bbbadbe9288af946944d9fd8f9267707873efd3;p=ceph.git

librbd: don't append zeros for RO caching reading

Just return actual contents.

Signed-off-by: Dehao Shang <dehao.shang@intel.com>
---

diff --git a/src/librbd/cache/SharedPersistentObjectCacher.cc b/src/librbd/cache/SharedPersistentObjectCacher.cc
index 79a549aab71b..ac0bbf50969b 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();
 }