rgw: don't try to delete object if does not exist

If we know that the object does not exist, no need to remove it.

Signed-off-by: Yehuda Sadeh <yehuda@redhat.com>
(cherry picked from commit 8d59a30)

src/rgw/rgw_rados.cc

@@ -7491,12 +7491,15 @@ int RGWRados::Object::Delete::delete_obj()
     }
   }
 
+  if (!state->exists) {
+    target->invalidate_state();
+    return -ENOENT;
+  }
+
   r = target->prepare_atomic_modification(op, false, NULL, NULL, NULL, true);
   if (r < 0)
     return r;
 
-  bool ret_not_existed = (!state->exists);
-
   RGWBucketInfo& bucket_info = target->get_bucket_info();
 
   RGWRados::Bucket bop(store, bucket_info);
@@ -7547,9 +7550,6 @@ int RGWRados::Object::Delete::delete_obj()
   if (r < 0)
     return r;
 
-  if (ret_not_existed)
-    return -ENOENT;
-
   /* update quota cache */
   store->quota_handler->update_stats(params.bucket_owner, bucket, -1, 0, obj_size);