From 965ccc32f68d8b57550a54b53da227ce37e25533 Mon Sep 17 00:00:00 2001
From: Radoslaw Zarzynski <rzarzyns@redhat.com>
Date: Sun, 3 Nov 2019 13:22:30 +0100
Subject: [PATCH] Revert "Revert "test: librados startup/shutdown racer test""

This reverts commit 3010d3a531ab21e8d3d2753b2a40526fd33589c9.

Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>
---
 src/test/librados/misc.cc | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/src/test/librados/misc.cc b/src/test/librados/misc.cc
index 5f7fdd889f5..0c351db2d26 100644
--- a/src/test/librados/misc.cc
+++ b/src/test/librados/misc.cc
@@ -16,6 +16,8 @@
 #include "test/librados/test.h"
 #include "test/librados/TestCase.h"
 #include "gtest/gtest.h"
+#include <sys/time.h>
+#include <sys/resource.h>
 
 #include <errno.h>
 #include <map>
@@ -308,3 +310,36 @@ TEST_F(LibRadosMisc, MinCompatClient) {
   ASSERT_LE(-1, require_min_compat_client);
   ASSERT_GT(CEPH_RELEASE_MAX, require_min_compat_client);
 }
+
+static void shutdown_racer_func()
+{
+  const int niter = 32;
+  rados_t rad;
+  int i;
+
+  for (i = 0; i < niter; ++i) {
+    ASSERT_EQ("", connect_cluster(&rad));
+    rados_shutdown(rad);
+  }
+}
+
+// See trackers #20988 and #42026
+TEST_F(LibRadosMisc, ShutdownRace)
+{
+  const int nthreads = 128;
+  std::thread threads[nthreads];
+
+  // Need a bunch of fd's for this test
+  struct rlimit rold, rnew;
+  ASSERT_EQ(getrlimit(RLIMIT_NOFILE, &rold), 0);
+  rnew = rold;
+  rnew.rlim_cur = rnew.rlim_max;
+  ASSERT_EQ(setrlimit(RLIMIT_NOFILE, &rnew), 0);
+
+  for (int i = 0; i < nthreads; ++i)
+    threads[i] = std::thread(shutdown_racer_func);
+
+  for (int i = 0; i < nthreads; ++i)
+    threads[i].join();
+  ASSERT_EQ(setrlimit(RLIMIT_NOFILE, &rold), 0);
+}
-- 
2.47.3