[src/trunk]: src/tests/fs/vfs add a few overwrite-related tests

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

details:   https://anonhg.NetBSD.org/src/rev/bc6cceea628a
branches:  trunk
changeset: 761611:bc6cceea628a
user:      pooka <pooka%NetBSD.org@localhost>
date:      Wed Feb 02 14:42:15 2011 +0000

description:
add a few overwrite-related tests

diffstat:

 tests/fs/vfs/t_io.c |  49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 48 insertions(+), 1 deletions(-)

diffs (74 lines):

diff -r 970860b4da09 -r bc6cceea628a tests/fs/vfs/t_io.c
--- a/tests/fs/vfs/t_io.c       Wed Feb 02 14:41:55 2011 +0000
+++ b/tests/fs/vfs/t_io.c       Wed Feb 02 14:42:15 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_io.c,v 1.6 2011/01/03 09:35:33 pooka Exp $   */
+/*     $NetBSD: t_io.c,v 1.7 2011/02/02 14:42:15 pooka Exp $   */
 
 /*-
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -117,10 +117,54 @@
        extendbody(tc, 37);
 }
 
+static void
+overwritebody(const atf_tc_t *tc, off_t count, bool dotrunc)
+{
+       char *buf;
+       int fd;
+
+       REQUIRE_LIBC(buf = malloc(count), NULL);
+       FSTEST_ENTER();
+       RL(fd = rump_sys_open("testi", O_CREAT | O_RDWR));
+       ATF_REQUIRE_EQ(rump_sys_write(fd, buf, count), count);
+       RL(rump_sys_close(fd));
+
+       RL(fd = rump_sys_open("testi", O_CREAT | O_RDWR));
+       if (dotrunc)
+               RL(rump_sys_ftruncate(fd, 0));
+       ATF_REQUIRE_EQ(rump_sys_write(fd, buf, count), count);
+       RL(rump_sys_close(fd));
+       FSTEST_EXIT();
+}
+
+static void
+overwrite512(const atf_tc_t *tc, const char *mp)
+{
+
+       overwritebody(tc, 512, false);
+}
+
+static void
+overwrite64k(const atf_tc_t *tc, const char *mp)
+{
+
+       overwritebody(tc, 1<<16, false);
+}
+
+static void
+overwrite_trunc(const atf_tc_t *tc, const char *mp)
+{
+
+       overwritebody(tc, 1<<16, true);
+}
+
 ATF_TC_FSAPPLY(holywrite, "create a sparse file and fill hole");
 ATF_TC_FSAPPLY(extendfile, "check that extending a file works");
 ATF_TC_FSAPPLY(extendfile_append, "check that extending a file works "
                                  "with a append-only fd");
+ATF_TC_FSAPPLY(overwrite512, "write a 512 byte file twice");
+ATF_TC_FSAPPLY(overwrite64k, "write a 64k byte file twice");
+ATF_TC_FSAPPLY(overwrite_trunc, "write 64k + truncate + rewrite");
 
 ATF_TP_ADD_TCS(tp)
 {
@@ -128,6 +172,9 @@
        ATF_TP_FSAPPLY(holywrite);
        ATF_TP_FSAPPLY(extendfile);
        ATF_TP_FSAPPLY(extendfile_append);
+       ATF_TP_FSAPPLY(overwrite512);
+       ATF_TP_FSAPPLY(overwrite64k);
+       ATF_TP_FSAPPLY(overwrite_trunc);
 
        return atf_no_error();
 }