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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2009
* Veerendra C <vechandr@in.ibm.com>
* Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
*/
/*\
* [Description]
*
* Test if SysV IPC shared memory is properly used between two namespaces.
*
* [Algorithm]
*
* Create two 'containers'.
* In container1, create Shared Memory segment with a specific key.
* In container2, try to access the MQ created in container1.
*
* Test is PASS if flag = none and the shmem seg is accessible in container2.
* If flag = unshare/clone and the shmem seg is not accessible in container2.
* If shmem seg is not accessible in container2, creates new shmem with same
* key to double check isloation in IPCNS.
*
* Test is FAIL if flag = none and the shmem seg is not accessible, if
* flag = unshare/clone and shmem seg is accessible in container2 or if the new
* shmem seg creation Fails.
*/
#define _GNU_SOURCE
#include <sys/wait.h>
#include <sys/msg.h>
#include <sys/types.h>
#include "tst_safe_sysv_ipc.h"
#include "tst_test.h"
#include "common.h"
#define TESTKEY 124426L
static char *str_op;
static int use_clone;
static int check_shmem1(LTP_ATTRIBUTE_UNUSED void *vtest)
{
int id;
id = SAFE_SHMGET(TESTKEY, 100, IPC_CREAT);
tst_res(TINFO, "container1: able to create shared mem segment");
TST_CHECKPOINT_WAKE_AND_WAIT(0);
SAFE_SHMCTL(id, IPC_RMID, NULL);
return 0;
}
static int check_shmem2(LTP_ATTRIBUTE_UNUSED void *vtest)
{
TST_CHECKPOINT_WAIT(0);
TEST(shmget(TESTKEY, 100, 0));
if (TST_RET < 0) {
if (use_clone == T_NONE)
tst_res(TFAIL, "Plain cloned process didn't find shmem segment");
else
tst_res(TPASS, "%s: in namespace2 unable to access the shmem seg created in namespace1", str_op);
} else {
if (use_clone == T_NONE)
tst_res(TPASS, "Plain cloned process able to access shmem segment created");
else
tst_res(TFAIL, "%s: in namespace2 found the shmem segment created in namespace1", str_op);
}
TST_CHECKPOINT_WAKE(0);
return 0;
}
static void run(void)
{
clone_unshare_test(use_clone, CLONE_NEWIPC, check_shmem1, NULL);
clone_unshare_test(use_clone, CLONE_NEWIPC, check_shmem2, NULL);
}
static void setup(void)
{
use_clone = get_clone_unshare_enum(str_op);
if (use_clone != T_NONE)
check_newipc();
}
static struct tst_test test = {
.test_all = run,
.setup = setup,
.forks_child = 1,
.needs_root = 1,
.needs_checkpoints = 1,
.options = (struct tst_option[]) {
{ "m:", &str_op, "Test execution mode <clone|unshare|none>" },
{},
},
};
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