mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-29 21:12:29 +00:00
a1144f9fd1
We should explicitly unlink old /dev/null instance, otherwise if such device already exist we might hit a problem as | (00.002984) 7412 fdinfo 0: pos: 0x 0 flags: 100002/0 | (00.003015) Dumping path for 0 fd via self 42 [/dev/null] | (00.003025) Error (files-reg.c:422): Unaccessible path opened 2049:109720, need 5:10 | (00.003033) Error (cr-dump.c:1565): Dump files (pid: 7412) failed with -1 Reported-by: Alexander Kartashov <alekskartashov@parallels.com> Tested-by: Alexander Kartashov <alekskartashov@parallels.com> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
123 lines
2.3 KiB
C
123 lines
2.3 KiB
C
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "zdtmtst.h"
|
|
|
|
const char *test_doc = "Check that mountpoints (in mount namespace) are supported";
|
|
const char *test_author = "Pavel Emelianov <xemul@parallels.com>";
|
|
|
|
#define MPTS_ROOT "/zdtm_mpts/"
|
|
|
|
static char buf[1024];
|
|
|
|
static int test_fn(int argc, char **argv)
|
|
{
|
|
FILE *f;
|
|
int fd, tmpfs_fd;
|
|
unsigned fs_cnt, fs_cnt_last = 0;
|
|
|
|
again:
|
|
fs_cnt = 0;
|
|
f = fopen("/proc/self/mountinfo", "r");
|
|
if (!f) {
|
|
fail("Can't open mountinfo");
|
|
return -1;
|
|
}
|
|
|
|
while (fgets(buf, sizeof(buf), f) != NULL) {
|
|
char *mp = buf, *end;
|
|
|
|
mp = strchr(mp, ' ') + 1;
|
|
mp = strchr(mp, ' ') + 1;
|
|
mp = strchr(mp, ' ') + 1;
|
|
mp = strchr(mp, ' ') + 1;
|
|
end = strchr(mp, ' ');
|
|
*end = '\0';
|
|
|
|
if (!strcmp(mp, "/"))
|
|
continue;
|
|
if (!strcmp(mp, "/proc"))
|
|
continue;
|
|
|
|
if (umount(mp))
|
|
test_msg("umount(`%s') failed: %m\n", mp);
|
|
fs_cnt++;
|
|
}
|
|
|
|
fclose(f);
|
|
|
|
if (fs_cnt == 0)
|
|
goto done;
|
|
|
|
if (fs_cnt != fs_cnt_last) {
|
|
fs_cnt_last = fs_cnt;
|
|
goto again;
|
|
}
|
|
|
|
fail("Can't umount all the filesystems");
|
|
return -1;
|
|
|
|
done:
|
|
rmdir(MPTS_ROOT);
|
|
if (mkdir(MPTS_ROOT, 0600) < 0) {
|
|
fail("Can't make zdtm_sys");
|
|
return 1;
|
|
}
|
|
|
|
if (mount("none", MPTS_ROOT, "sysfs", 0, "") < 0) {
|
|
fail("Can't mount sysfs");
|
|
return 1;
|
|
}
|
|
|
|
if (mount("none", MPTS_ROOT"/dev", "tmpfs", 0, "") < 0) {
|
|
fail("Can't mount tmpfs");
|
|
return 1;
|
|
}
|
|
tmpfs_fd = open(MPTS_ROOT"/dev/test", O_WRONLY | O_CREAT);
|
|
if (write(tmpfs_fd, "hello", 5) <= 0) {
|
|
err("write() failed");
|
|
return 1;
|
|
}
|
|
|
|
if (mount("none", MPTS_ROOT"/kernel", "proc", 0, "") < 0) {
|
|
fail("Can't mount proc");
|
|
return 1;
|
|
}
|
|
if (mount("none", MPTS_ROOT"/kernel/sys/fs/binfmt_misc",
|
|
"binfmt_misc", 0, "") < 0) {
|
|
fail("Can't mount binfmt_misc");
|
|
return 1;
|
|
}
|
|
|
|
unlink("/dev/null");
|
|
mknod("/dev/null", 0777 | S_IFCHR, makedev(1, 3));
|
|
|
|
setup_outfile();
|
|
|
|
fd = open(MPTS_ROOT"/kernel/meminfo", O_RDONLY);
|
|
if (fd == -1)
|
|
return 1;
|
|
|
|
test_daemon();
|
|
test_waitsig();
|
|
|
|
/* this checks both -- sys and proc presence */
|
|
if (access(MPTS_ROOT"/kernel/meminfo", F_OK)) {
|
|
fail("No proc after restore");
|
|
return 1;
|
|
}
|
|
|
|
pass();
|
|
return 0;
|
|
}
|
|
|
|
#define CLONE_NEWNS 0x00020000
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
test_init_ns(argc, argv, CLONE_NEWNS, test_fn);
|
|
return 0;
|
|
}
|