test/librados_test_stub: handle exclusive create

The exclusive boolean of the create method was unused so far.
This commit adds the proper handling by checking if an object already exists, and returning EEXISTS appropriately.

Signed-off-by: Or Ozeri <oro@il.ibm.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/test/librados_test_stub/TestMemIoCtxImpl.cc b/src/test/librados_test_stub/TestMemIoCtxImpl.cc
index d1f2f8cda51..24b4ac559a3 100644
--- a/src/test/librados_test_stub/TestMemIoCtxImpl.cc
+++ b/src/test/librados_test_stub/TestMemIoCtxImpl.cc
@@ -108,6 +108,13 @@ int TestMemIoCtxImpl::create(const std::string& oid, bool exclusive,
   }
 
   std::unique_lock l{m_pool->file_lock};
+  if (exclusive) {
+    TestMemCluster::SharedFile file = get_file(oid, false, CEPH_NOSNAP, {});
+    if (file != NULL && file->exists) {
+      return -EEXIST;
+    }
+  }
+
   get_file(oid, true, CEPH_NOSNAP, snapc);
   return 0;
 }