reshard-fault.diff

   ret = target_shards_mgr.finish();
   if (ret < 0) {
     lderr(store->ctx()) << "ERROR: failed to reshard" << dendl;
     return -EIO;
   }
+  if (ret = f.check("link-bucket"); ret < 0) {
+    return ret;
+  }
   ret = store->ctl()->bucket->link_bucket(new_bucket_info.owner, new_bucket_info.bucket, bucket_info.creation_time, null_yield);
   if (ret < 0) {
     lderr(store->ctx()) << "failed to link new bucket instance (bucket_id=" << new_bucket_info.bucket.bucket_id << ": " << cpp_strerror(-ret) << ")" << dendl;
     return ret;
   }