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zdtm: check read-only bind mounts

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Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin 2015-09-07 22:34:40 +03:00 • committed by Pavel Emelyanov
parent 5cff834ae7
commit 0ee52669ac
3 changed files with 87 additions and 1 deletions
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3
test/zdtm.sh
View file

@ -189,6 +189,7 @@ 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
@ -328,9 +329,9 @@ chroot-file
console
vt
rtc
tempfs
maps007
tempfs
mnt_ro_bind
bind-mount
mountpoints
inotify_irmap

1
test/zdtm/live/static/Makefile
View file

@ -183,6 +183,7 @@ TST_DIR = \
overmount_fifo \
overmount_sock \
tempfs \
mnt_ro_bind \
mount_paths \
bind-mount \
inotify00 \

84
test/zdtm/live/static/mnt_ro_bind.c Normal file
View file

@ -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@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;
}