From 9e4e4976adf3ab2d6846daf78d0fb46097ca2a15 Mon Sep 17 00:00:00 2001
From: pooka <pooka@NetBSD.org>
Date: Mon, 29 Mar 2010 18:19:19 +0000
Subject: [PATCH] Add basic union test.

---
 tests/fs/Atffile         |   4 +-
 tests/fs/Makefile        |   4 +-
 tests/fs/union/Atffile   |   6 ++
 tests/fs/union/Makefile  |  13 ++++
 tests/fs/union/t_basic.c | 137 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 160 insertions(+), 4 deletions(-)
 create mode 100644 tests/fs/union/Atffile
 create mode 100644 tests/fs/union/Makefile
 create mode 100644 tests/fs/union/t_basic.c

diff --git a/tests/fs/Atffile b/tests/fs/Atffile
index 91d6e4d3c6ee..c3050c645ec3 100644
--- a/tests/fs/Atffile
+++ b/tests/fs/Atffile
@@ -1,6 +1,6 @@
 Content-Type: application/X-atf-atffile; version="1"
-X-NetBSD-Id: "$NetBSD: Atffile,v 1.4 2007/12/30 09:13:32 jmmv Exp $"
+X-NetBSD-Id: "$NetBSD: Atffile,v 1.5 2010/03/29 18:19:19 pooka Exp $"
 
 prop: test-suite = "NetBSD"
 
-tp-glob: *fs
+tp-glob: *fs union
diff --git a/tests/fs/Makefile b/tests/fs/Makefile
index d499aefabd63..8aa1b8ecdd99 100644
--- a/tests/fs/Makefile
+++ b/tests/fs/Makefile
@@ -1,10 +1,10 @@
-# $NetBSD: Makefile,v 1.4 2009/04/08 12:09:04 pooka Exp $
+# $NetBSD: Makefile,v 1.5 2010/03/29 18:19:19 pooka Exp $
 
 .include <bsd.own.mk>
 
 TESTSDIR=	${TESTSBASE}/fs
 
-SUBDIR=	ffs puffs tmpfs
+SUBDIR+=	ffs puffs tmpfs union
 
 FILES= h_funcs.subr
 FILESDIR= ${TESTSDIR}
diff --git a/tests/fs/union/Atffile b/tests/fs/union/Atffile
new file mode 100644
index 000000000000..49ba491c928a
--- /dev/null
+++ b/tests/fs/union/Atffile
@@ -0,0 +1,6 @@
+Content-Type: application/X-atf-atffile; version="1"
+X-NetBSD-Id: "$NetBSD: Atffile,v 1.1 2010/03/29 18:19:19 pooka Exp $"
+
+prop: test-suite = "NetBSD"
+
+tp: t_*
diff --git a/tests/fs/union/Makefile b/tests/fs/union/Makefile
new file mode 100644
index 000000000000..c7347a482a32
--- /dev/null
+++ b/tests/fs/union/Makefile
@@ -0,0 +1,13 @@
+#	$NetBSD: Makefile,v 1.1 2010/03/29 18:19:19 pooka Exp $
+#
+
+TESTSDIR=	${TESTSBASE}/fs/union
+WARNS=		4
+
+TESTS_C=	t_basic
+
+LDADD+=	-lrumpfs_union -lrumpvfs_layerfs -lrumpfs_ffs		# fs drivers
+LDADD+=	-lrumpdev_disk -lrumpdev				# disk device
+LDADD+=	-lrumpvfs -lrump -lrumpuser -lpthread			# base
+
+.include <bsd.test.mk>
diff --git a/tests/fs/union/t_basic.c b/tests/fs/union/t_basic.c
new file mode 100644
index 000000000000..8d1dfa6d6027
--- /dev/null
+++ b/tests/fs/union/t_basic.c
@@ -0,0 +1,137 @@
+/*	$NetBSD: t_basic.c,v 1.1 2010/03/29 18:19:19 pooka Exp $	*/
+
+#include <sys/types.h>
+#include <sys/mount.h>
+
+#include <atf-c.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <rump/rump.h>
+#include <rump/rump_syscalls.h>
+
+#include <miscfs/union/union.h>
+#include <ufs/ufs/ufsmount.h>
+
+#define USE_ATF
+#include "../../h_macros.h"
+
+#ifdef USE_ATF
+ATF_TC(basic);
+ATF_TC_HEAD(basic, tc)
+{
+	atf_tc_set_md_var(tc, "descr", "basic union functionality: two views");
+}
+#else
+#define atf_tc_fail(a, ...) errx(1, __VA_ARGS__)
+#endif
+
+#define MSTR "magic bus"
+
+static void
+xput_tfile(const char *path)
+{
+	int fd;
+
+	fd = rump_sys_open(path, O_CREAT | O_RDWR, 0777);
+	if (fd == -1)
+		atf_tc_fail_errno("create %s", path);
+	if (rump_sys_write(fd, MSTR, sizeof(MSTR)) != sizeof(MSTR))
+		atf_tc_fail_errno("write to testfile");
+	rump_sys_close(fd);
+}
+
+static int
+xread_tfile(const char *path)
+{
+	char buf[128];
+	int fd;
+
+	fd = rump_sys_open(path, O_RDONLY);
+	if (fd == -1)
+		return errno;
+	if (rump_sys_read(fd, buf, sizeof(buf)) == -1)
+		atf_tc_fail_errno("read tfile");
+	rump_sys_close(fd);
+	if (strcmp(buf, MSTR) == 0)
+		return 0;
+	return EPROGMISMATCH;
+}
+
+#define IMG1 "atf1.img"
+#define IMG2 "atf2.img"
+#define DEV1 "/dev/fs1"
+#define DEV2 "/dev/fs2"
+#define newfs_base "newfs -F -s 10000 "
+
+#ifdef USE_ATF
+ATF_TC_BODY(basic, tc)
+#else
+int main(int argc, char *argv[])
+#endif
+{
+	struct ufs_args args;
+	struct union_args unionargs;
+	int error;
+
+	if (system(newfs_base IMG1) == -1)
+		atf_tc_fail_errno("create img1");
+	if (system(newfs_base IMG2) == -1)
+		atf_tc_fail_errno("create img2");
+
+	rump_init();
+        rump_pub_etfs_register(DEV1, IMG1, RUMP_ETFS_BLK);
+        rump_pub_etfs_register(DEV2, IMG2, RUMP_ETFS_BLK);
+
+	if (rump_sys_mkdir("/mp1", 0777) == -1)
+		atf_tc_fail_errno("mp1");
+	if (rump_sys_mkdir("/mp2", 0777) == -1)
+		atf_tc_fail_errno("mp1");
+
+	memset(&args, 0, sizeof(args));
+	args.fspec = __UNCONST(DEV1);
+	if (rump_sys_mount(MOUNT_FFS, "/mp1", 0, &args, sizeof(args)) == -1)
+		atf_tc_fail_errno("could not mount ffs1");
+
+	memset(&args, 0, sizeof(args));
+	args.fspec = __UNCONST(DEV2);
+	if (rump_sys_mount(MOUNT_FFS, "/mp2", 0, &args, sizeof(args)) == -1)
+		atf_tc_fail_errno("could not mount tmpfs2");
+
+	xput_tfile("/mp1/tensti");
+	memset(&unionargs, 0, sizeof(unionargs));
+
+	unionargs.target = __UNCONST("/mp1");
+	unionargs.mntflags = UNMNT_BELOW;
+
+	if (rump_sys_mount(MOUNT_UNION, "/mp2", 0,
+	    &unionargs, sizeof(unionargs)) == -1)
+		atf_tc_fail_errno("union mount");
+
+	/* first, test we can read the old file from the new namespace */
+	error = xread_tfile("/mp2/tensti");
+	if (error != 0)
+		atf_tc_fail("union compare failed: %d (%s)",
+		    error, strerror(error));
+
+	/* then, test upper layer writes don't affect the lower layer */
+	xput_tfile("/mp2/kiekko");
+	if ((error = xread_tfile("/mp1/kiekko")) != ENOENT)
+		atf_tc_fail("invisibility failed: %d (%s)",
+		    error, strerror(error));
+
+	/* unmount etc. yaddayadda if non-lazy */
+}
+
+#ifdef USE_ATF
+ATF_TP_ADD_TCS(tp)
+{
+	ATF_TP_ADD_TC(tp, basic);
+	return 0; /*XXX?*/
+}
+#endif