[CRIU] [PATCH 2/4] zdtm: check read-only bind mounts
Andrey Vagin
avagin at openvz.org
Mon Sep 7 12:34:40 PDT 2015
Signed-off-by: Andrey Vagin <avagin at openvz.org>
---
test/zdtm.sh | 3 +-
test/zdtm/live/static/Makefile | 1 +
test/zdtm/live/static/mnt_ro_bind.c | 84 +++++++++++++++++++++++++++++++++++++
3 files changed, 87 insertions(+), 1 deletion(-)
create mode 100644 test/zdtm/live/static/mnt_ro_bind.c
diff --git a/test/zdtm.sh b/test/zdtm.sh
index b21ccdd..45ad737 100755
--- a/test/zdtm.sh
+++ b/test/zdtm.sh
@@ -184,6 +184,7 @@ generate_test_list()
ns/static/session00
ns/static/session01
ns/static/tempfs
+ ns/static/mnt_ro_bind
ns/static/mount_paths
ns/static/bind-mount
static/utsname
@@ -323,9 +324,9 @@ chroot-file
console
vt
rtc
-tempfs
maps007
tempfs
+mnt_ro_bind
bind-mount
mountpoints
inotify_irmap
diff --git a/test/zdtm/live/static/Makefile b/test/zdtm/live/static/Makefile
index 67be675..755d7ad 100644
--- a/test/zdtm/live/static/Makefile
+++ b/test/zdtm/live/static/Makefile
@@ -182,6 +182,7 @@ TST_DIR = \
overmount_fifo \
overmount_sock \
tempfs \
+ mnt_ro_bind \
mount_paths \
bind-mount \
inotify00 \
diff --git a/test/zdtm/live/static/mnt_ro_bind.c b/test/zdtm/live/static/mnt_ro_bind.c
new file mode 100644
index 0000000..1d98814
--- /dev/null
+++ b/test/zdtm/live/static/mnt_ro_bind.c
@@ -0,0 +1,84 @@
+#include <stdbool.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <linux/limits.h>
+#include <errno.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc = "Check read-only bind-mounts";
+const char *test_author = "Andrew Vagin <avagin at openvz.org>";
+
+char *dirname;
+TEST_OPTION(dirname, string, "directory name", 1);
+
+#define TEST_WORD "testtest"
+#define TEST_WORD2 "TESTTEST"
+
+int main(int argc, char **argv)
+{
+ int fd, ret = 1;
+ char rw_path[PATH_MAX], ro_path[PATH_MAX], rw_f[PATH_MAX], ro_f[PATH_MAX];
+
+ test_init(argc, argv);
+
+ snprintf(rw_path, sizeof(rw_path), "%s/rw", dirname);
+ snprintf(ro_path, sizeof(ro_path), "%s/ro", dirname);
+ snprintf(rw_f, sizeof(rw_f), "%s/rw/test", dirname);
+ snprintf(ro_f, sizeof(ro_f), "%s/ro/test", dirname);
+
+ mkdir(dirname, 0700);
+ if (mount("none", dirname, "tmpfs", 0, "") < 0) {
+ fail("Can't mount tmpfs");
+ return 1;
+ }
+ mkdir(rw_path, 0700);
+ mkdir(ro_path, 0700);
+
+ if (mount("zdtm_rw", rw_path, "tmpfs", 0, "") < 0) {
+ fail("Can't mount tmpfs");
+ return 1;
+ }
+
+ if (mount(rw_path, ro_path, NULL, MS_BIND, NULL) < 0) {
+ fail("Can't mount tmpfs");
+ return 1;
+ }
+
+ if (mount(NULL, ro_path, NULL, MS_BIND | MS_REMOUNT | MS_RDONLY, NULL) < 0) {
+ fail("Can't mount tmpfs");
+ return 1;
+ }
+
+ test_daemon();
+ test_waitsig();
+
+ fd = open(ro_f, O_CREAT | O_WRONLY, 0666);
+ if (fd != -1 || errno != EROFS) {
+ fail("%s is created", ro_f);
+ goto err;
+ }
+
+ fd = open(rw_f, O_CREAT | O_WRONLY, 0666);
+ if (fd < 0) {
+ fail("Unable to create %s", rw_f);
+ goto err;
+ }
+ close(fd);
+
+ fd = open(ro_f, O_RDONLY);
+ if (fd < 0) {
+ fail("Unable to create %s", rw_f);
+ goto err;
+ }
+
+ pass();
+ ret = 0;
+err:
+ umount2(dirname, MNT_DETACH);
+ rmdir(dirname);
+ return ret;
+}
--
2.4.3
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