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zdtm/mountpoints: test nested mount namespaces

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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
2014-04-21 18:23:23 +04:00
committed by Pavel Emelyanov
parent d2012883ab
commit c51e91f6ec
1 changed files with 62 additions and 1 deletions
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63
test/zdtm/live/static/mountpoints.c
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@@ -1,9 +1,13 @@
#define _GNU_SOURCE
#include <stdbool.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sched.h>
#include <sys/wait.h>
#include "zdtmtst.h"
@@ -14,13 +18,56 @@ const char *test_author = "Pavel Emelianov <xemul@parallels.com>";
static char buf[1024];
#define NS_STACK_SIZE 4096
/* All arguments should be above stack, because it grows down */
struct ns_exec_args {
char stack[NS_STACK_SIZE];
char stack_ptr[0];
int status_pipe[2];
};
int ns_child(void *_arg)
{
struct stat st;
pid_t pid;
mkdir(MPTS_ROOT"/dev/mntns2", 0600);
if (mount("none", MPTS_ROOT"/dev/mntns2", "tmpfs", 0, "") < 0) {
fail("Can't mount tmpfs");
return 1;
}
mkdir(MPTS_ROOT"/dev/mntns2/test", 0600);
pid = fork();
test_waitsig();
if (pid) {
int status = 1;;
kill(pid, SIGTERM);
wait(&status);
if (status)
return 1;
}
if (stat(MPTS_ROOT"/dev/mntns2/test", &st)) {
err("Can't stat /dev/share-1/test.share/test.share");
return 1;
}
return 0;
}
static int test_fn(int argc, char **argv)
{
FILE *f;
int fd, tmpfs_fd;
unsigned fs_cnt, fs_cnt_last = 0;
struct ns_exec_args args;
bool private = false;
mode_t old_mask;
pid_t pid;
again:
fs_cnt = 0;
@@ -147,7 +194,6 @@ done:
fail("Can't bind mount a tmpfs directory");
return 1;
}
mkdir(MPTS_ROOT"/dev/slave", 0600);
if (mount(MPTS_ROOT"/dev/share-1", MPTS_ROOT"/dev/slave", NULL, MS_BIND, NULL) < 0) {
fail("Can't bind mount a tmpfs directory");
@@ -192,6 +238,7 @@ done:
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");
@@ -215,6 +262,12 @@ done:
if (fd == -1)
return 1;
pid = clone(ns_child, args.stack_ptr, CLONE_NEWNS | SIGCHLD, &args);
if (pid < 0) {
err("Unable to fork child");
return 1;
}
test_daemon();
test_waitsig();
@@ -269,6 +322,14 @@ done:
}
}
{
kill(pid, SIGTERM);
int status = 1;
wait(&status);
if (status)
return 1;
}
pass();
return 0;
}