test: add configuration to check tmpfs magic

This adds a new test suite just for statfs to check that our wrapper
returns the magic value for tmpfs when UNIFYFS_CLIENT_SUPER_MAGIC=0.
A separate suite is required in order to change the environment
under which the test runs.

t/0110-statfs-gotcha.t

@@ -0,0 +1,13 @@
+#!/bin/bash
+#
+# Source sharness environment scripts to pick up test environment
+# and UnifyFS runtime settings.
+#
+. $(dirname $0)/sharness.d/00-test-env.sh
+. $(dirname $0)/sharness.d/01-unifyfs-settings.sh
+
+# disable statfs from returning UnifyFS! super magic value,
+# return tmpfs magic instead
+export UNIFYFS_CLIENT_SUPER_MAGIC=0
+
+$JOB_RUN_COMMAND $UNIFYFS_BUILD_DIR/t/sys/statfs-gotcha.t

t/0510-statfs-static.t

@@ -0,0 +1,13 @@
+#!/bin/bash
+#
+# Source sharness environment scripts to pick up test environment
+# and UnifyFS runtime settings.
+#
+. $(dirname $0)/sharness.d/00-test-env.sh
+. $(dirname $0)/sharness.d/01-unifyfs-settings.sh
+
+# disable statfs from returning UnifyFS! super magic value,
+# return tmpfs magic instead
+export UNIFYFS_CLIENT_SUPER_MAGIC=0
+
+$JOB_RUN_COMMAND $UNIFYFS_BUILD_DIR/t/sys/statfs-static.t

t/Makefile.am

@@ -10,11 +10,13 @@ TESTS = \
 if HAVE_GOTCHA
   TESTS += \
     0100-sysio-gotcha.t \
+    0110-statfs-gotcha.t \
     0200-stdio-gotcha.t
 endif
 
 TESTS += \
   0500-sysio-static.t \
+  0510-statfs-static.t \
   0600-stdio-static.t \
   0700-unifyfs-stage-full.t \
   9005-unifyfs-unmount.t \
@@ -28,6 +30,7 @@ TESTS += \
 check_SCRIPTS = \
   0001-setup.t \
   0500-sysio-static.t \
+  0510-statfs-static.t \
   0600-stdio-static.t \
   0700-unifyfs-stage-full.t \
   9005-unifyfs-unmount.t \
@@ -41,6 +44,7 @@ check_SCRIPTS = \
 if HAVE_GOTCHA
   check_SCRIPTS += \
     0100-sysio-gotcha.t \
+    0110-statfs-gotcha.t \
     0200-stdio-gotcha.t
 endif
 
@@ -59,12 +63,14 @@ libexec_PROGRAMS = \
   common/seg_tree_test.t \
   common/slotmap_test.t \
   std/stdio-static.t \
+  sys/statfs-static.t \
   sys/sysio-static.t \
   unifyfs_unmount.t
 
 if HAVE_GOTCHA
   libexec_PROGRAMS += \
     std/stdio-gotcha.t \
+    sys/statfs-gotcha.t \
     sys/sysio-gotcha.t
 endif
 
@@ -151,6 +157,24 @@ sys_sysio_static_t_CPPFLAGS = $(test_cppflags)
 sys_sysio_static_t_LDADD = $(test_wrap_ldadd)
 sys_sysio_static_t_LDFLAGS = $(test_wrap_ldflags)
 
+sys_statfs_gotcha_t_SOURCES = \
+  sys/statfs_suite.h \
+  sys/statfs_suite.c \
+  sys/statfs.c
+
+sys_statfs_gotcha_t_CPPFLAGS = $(test_cppflags)
+sys_statfs_gotcha_t_LDADD = $(test_gotcha_ldadd)
+sys_statfs_gotcha_t_LDFLAGS = $(test_gotcha_ldflags)
+
+sys_statfs_static_t_SOURCES = \
+  sys/statfs_suite.h \
+  sys/statfs_suite.c \
+  sys/statfs.c
+
+sys_statfs_static_t_CPPFLAGS = $(test_cppflags)
+sys_statfs_static_t_LDADD = $(test_wrap_ldadd)
+sys_statfs_static_t_LDFLAGS = $(test_wrap_ldflags)
+
 std_stdio_gotcha_t_SOURCES = \
   std/stdio_suite.h \
   std/stdio_suite.c \

t/sys/statfs_suite.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018, Lawrence Livermore National Security, LLC.
+ * Produced at the Lawrence Livermore National Laboratory.
+ *
+ * Copyright 2018, UT-Battelle, LLC.
+ *
+ * LLNL-CODE-741539
+ * All rights reserved.
+ *
+ * This is the license for UnifyFS.
+ * For details, see https://github.com/LLNL/UnifyFS.
+ * Please read https://github.com/LLNL/UnifyFS/LICENSE for full license text.
+ */
+
+#include <string.h>
+#include <mpi.h>
+#include <unifyfs.h>
+#include "t/lib/tap.h"
+#include "t/lib/testutil.h"
+
+#include "statfs_suite.h"
+
+/* The test suite for statfs wrappers found in client/src/unifyfs-sysio.c.
+ *
+ * This is specifically designed to test stafs when client super magic has
+ * been disabled, so that statfs returns TMPFS_MAGIC. */
+int main(int argc, char* argv[])
+{
+    int rank_num;
+    int rank;
+    char* unifyfs_root;
+    int rc;
+
+    MPI_Init(&argc, &argv);
+    MPI_Comm_size(MPI_COMM_WORLD, &rank_num);
+    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+
+    plan(NO_PLAN);
+
+    unifyfs_root = testutil_get_mount_point();
+
+    /* Verify unifyfs_mount succeeds. */
+    rc = unifyfs_mount(unifyfs_root, rank, rank_num, 0);
+    ok(rc == 0, "unifyfs_mount(%s) (rc=%d)", unifyfs_root, rc);
+
+    /* If the mount fails, bailout, as there is no point in running the tests */
+    if (rc != 0) {
+        BAIL_OUT("unifyfs_mount in statfs_suite failed");
+    }
+
+    /* check that statfs returns TMPFS_MAGIC
+     * when UNIFYFS_CLIENT_SUPER_MAGIC=0 */
+    statfs_test(unifyfs_root, 0);
+
+    rc = unifyfs_unmount();
+    ok(rc == 0, "unifyfs_unmount(%s) (rc=%d)", unifyfs_root, rc);
+
+    MPI_Finalize();
+
+    done_testing();
+
+    return 0;
+}

t/sys/statfs_suite.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2018, Lawrence Livermore National Security, LLC.
+ * Produced at the Lawrence Livermore National Laboratory.
+ *
+ * Copyright 2018, UT-Battelle, LLC.
+ *
+ * LLNL-CODE-741539
+ * All rights reserved.
+ *
+ * This is the license for UnifyFS.
+ * For details, see https://github.com/LLNL/UnifyFS.
+ * Please read https://github.com/LLNL/UnifyFS/LICENSE for full license text.
+ */
+
+
+/* This test checks that statfs returns the correct value when one
+ * has set UNIFYFS_CLIENT_SUPER_MAGIC=0.  It runs as a separate
+ * test suite because it requires a different environmental
+ * configuration than the other tests. */
+#ifndef STATFS_SUITE_H
+#define STATFS_SUITE_H
+
+/* Tests for UNIFYFS_WRAP(statfs) */
+int statfs_test(char* unifyfs_root, int expect_unifyfs_magic);
+
+#endif /* STATFS_SUITE_H */