[src/trunk]: src/tests/fs/vfs PR kern/51762: add a test program

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/51f4b5d8a572
branches:  trunk
changeset: 821374:51f4b5d8a572
user:      martin <martin%NetBSD.org@localhost>
date:      Thu Feb 02 22:07:05 2017 +0000

description:
PR kern/51762: add a test program

diffstat:

 tests/fs/vfs/Makefile         |   3 +-
 tests/fs/vfs/t_mtime_otrunc.c |  86 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+), 1 deletions(-)

diffs (107 lines):

diff -r 623a081f843b -r 51f4b5d8a572 tests/fs/vfs/Makefile
--- a/tests/fs/vfs/Makefile     Thu Feb 02 21:57:03 2017 +0000
+++ b/tests/fs/vfs/Makefile     Thu Feb 02 22:07:05 2017 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: Makefile,v 1.23 2017/01/27 10:45:11 hannken Exp $
+#      $NetBSD: Makefile,v 1.24 2017/02/02 22:07:05 martin Exp $
 #
 
 .include <bsd.own.mk>
@@ -14,6 +14,7 @@
 TESTS_C+=      t_rwtoro
 TESTS_C+=      t_union
 TESTS_C+=      t_unpriv
+TESTS_C+=      t_mtime_otrunc
 TESTS_C+=      t_vfsops
 TESTS_C+=      t_vnops
 
diff -r 623a081f843b -r 51f4b5d8a572 tests/fs/vfs/t_mtime_otrunc.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/fs/vfs/t_mtime_otrunc.c     Thu Feb 02 22:07:05 2017 +0000
@@ -0,0 +1,86 @@
+/*-
+ * Copyright (c) 2017 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__COPYRIGHT("@(#) Copyright (c) 2013\
+ The NetBSD Foundation, inc. All rights reserved.");
+__RCSID("$NetBSD: t_mtime_otrunc.c,v 1.1 2017/02/02 22:07:05 martin Exp $");
+
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <atf-c.h>
+
+#include <rump/rump_syscalls.h>
+#include <rump/rump.h>
+
+#include "../common/h_fsmacros.h"
+
+#define LOCKFILE       "lock"
+
+static time_t
+lock_it(void)
+{
+       struct stat st;
+
+       if (rump_sys_stat(LOCKFILE, &st) != 0)
+               st.st_mtime = 0;
+
+       int f = rump_sys_open(LOCKFILE, O_WRONLY|O_CREAT|O_TRUNC, 0666);
+       if (f == -1) return 0;
+       rump_sys_close(f);
+
+       return st.st_mtime;
+}
+
+static void
+otrunc_mtime_update(const atf_tc_t *tc, const char *path)
+{
+       time_t last_ts = 0;
+       int res;
+
+       /* atf_tc_expect_fail("PR kern/51762"); */
+
+       res = rump_sys_chdir(path);
+       if (res == -1)
+               atf_tc_fail("chdir failed");
+
+       for (int i = 0; i < 5; i++) {
+               time_t l = lock_it();
+               printf("last lock: %ld\n", (long)l);
+               ATF_REQUIRE_MSG(i == 0 || l > last_ts,
+                   "iteration %d: lock time did not increase, old time %lu, "
+                   "new time %lu", i,
+                   (unsigned long)last_ts, (unsigned long)l);
+               last_ts = l;
+               sleep(2);
+       }
+       rump_sys_chdir("/");
+}
+
+ATF_FSAPPLY(otrunc_mtime_update, "Checks for mtime updates by open(O_TRUNC) (PR kern/51762)");