os/filestore: make read replace (not append) to result bl

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/os/filestore/FileStore.cc b/src/os/filestore/FileStore.cc
index 9d0eeac2e3e2d850dcab70df17be3e65e0db5216..b6bf02b2cb195877860b0e0505b299fa080984df 100644 (file)
--- a/src/os/filestore/FileStore.cc
+++ b/src/os/filestore/FileStore.cc
@@ -2976,6 +2976,7 @@ int FileStore::read(
     return got;
   }
   bptr.set_length(got);   // properly size the buffer
+  bl.clear();
   bl.push_back(std::move(bptr));   // put it in the target bufferlist
 
 #ifdef HAVE_POSIX_FADVISE