1 files changed, 124 insertions, 0 deletions
diff --git a/src/test/osd/test_ec_transaction.cc b/src/test/osd/test_ec_transaction.cc
new file mode 100644
index 00000000..98669667
--- /dev/null
+++ b/src/test/osd/test_ec_transaction.cc
@@ -0,0 +1,124 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2016 Red Hat
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include <gtest/gtest.h>
+#include "osd/PGTransaction.h"
+#include "osd/ECTransaction.h"
+
+#include "test/unit.cc"
+
+struct mydpp : public DoutPrefixProvider {
+  std::ostream& gen_prefix(std::ostream& out) const override { return out << "foo"; }
+  CephContext *get_cct() const override { return g_ceph_context; }
+  unsigned get_subsys() const override { return ceph_subsys_osd; }
+} dpp;
+
+#define dout_context g_ceph_context
+
+TEST(ectransaction, two_writes_separated)
+{
+  hobject_t h;
+  PGTransactionUPtr t(new PGTransaction);
+  bufferlist a, b;
+  t->create(h);
+  a.append_zero(565760);
+  t->write(h, 0, a.length(), a, 0);
+  b.append_zero(2437120);
+  t->write(h, 669856, b.length(), b, 0);
+
+  ECUtil::stripe_info_t sinfo(2, 8192);
+  auto plan = ECTransaction::get_write_plan(
+    sinfo,
+    std::move(t),
+    [&](const hobject_t &i) {
+      ECUtil::HashInfoRef ref(new ECUtil::HashInfo(1));
+      return ref;
+    },
+    &dpp);
+  generic_derr << "to_read " << plan.to_read << dendl;
+  generic_derr << "will_write " << plan.will_write << dendl;
+
+  ASSERT_EQ(0u, plan.to_read.size());
+  ASSERT_EQ(1u, plan.will_write.size());
+}
+
+TEST(ectransaction, two_writes_nearby)
+{
+  hobject_t h;
+  PGTransactionUPtr t(new PGTransaction);
+  bufferlist a, b;
+  t->create(h);
+
+  // two nearby writes, both partly touching the same 8192-byte stripe
+  ECUtil::stripe_info_t sinfo(2, 8192);
+  a.append_zero(565760);
+  t->write(h, 0, a.length(), a, 0);
+  b.append_zero(2437120);
+  t->write(h, 569856, b.length(), b, 0);
+
+  auto plan = ECTransaction::get_write_plan(
+    sinfo,
+    std::move(t),
+    [&](const hobject_t &i) {
+      ECUtil::HashInfoRef ref(new ECUtil::HashInfo(1));
+      return ref;
+    },
+    &dpp);
+  generic_derr << "to_read " << plan.to_read << dendl;
+  generic_derr << "will_write " << plan.will_write << dendl;
+
+  ASSERT_EQ(0u, plan.to_read.size());
+  ASSERT_EQ(1u, plan.will_write.size());
+}
+
+TEST(ectransaction, many_writes)
+{
+  hobject_t h;
+  PGTransactionUPtr t(new PGTransaction);
+  bufferlist a, b;
+  a.append_zero(512);
+  b.append_zero(4096);
+  t->create(h);
+
+  ECUtil::stripe_info_t sinfo(2, 8192);
+  // write 2801664~512
+  // write 2802176~512
+  // write 2802688~512
+  // write 2803200~512
+  t->write(h, 2801664, a.length(), a, 0);
+  t->write(h, 2802176, a.length(), a, 0);
+  t->write(h, 2802688, a.length(), a, 0);
+  t->write(h, 2803200, a.length(), a, 0);
+
+  // write 2805760~4096
+  // write 2809856~4096
+  // write 2813952~4096
+  t->write(h, 2805760, b.length(), b, 0);
+  t->write(h, 2809856, b.length(), b, 0);
+  t->write(h, 2813952, b.length(), b, 0);
+
+  auto plan = ECTransaction::get_write_plan(
+    sinfo,
+    std::move(t),
+    [&](const hobject_t &i) {
+      ECUtil::HashInfoRef ref(new ECUtil::HashInfo(1));
+      return ref;
+    },
+    &dpp);
+  generic_derr << "to_read " << plan.to_read << dendl;
+  generic_derr << "will_write " << plan.will_write << dendl;
+
+  ASSERT_EQ(0u, plan.to_read.size());
+  ASSERT_EQ(1u, plan.will_write.size());
+}