filestore: fix ZERO fallback write

It helps if we write zeros!

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/src/os/FileStore.cc b/src/os/FileStore.cc
index 6a93107efccdf5687a242a7d885e0b67427dea09..7b876dda56c4b5fd6b67a93bccc65a94c98e4dcd 100644 (file)
--- a/src/os/FileStore.cc
+++ b/src/os/FileStore.cc
@@ -3057,6 +3057,7 @@ int FileStore::_zero(coll_t cid, const hobject_t& oid, uint64_t offset, size_t l
   dout(20) << "zero FALLOC_FL_PUNCH_HOLE not supported, falling back to writing zeros" << dendl;
   {
     bufferptr bp(len);
+    bp.zero();
     bufferlist bl;
     bl.push_back(bp);
     ret = _write(cid, oid, offset, len, bl);