/*
* Copyright (c) International Business Machines Corp., 2004
* Copyright (c) Linux Test Project, 2004-2017
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*/
/*
* DESCRIPTION
* hugeshmctl02 - check for EACCES, EFAULT and EINVAL errors
*
* ALGORITHM
* create a large shared memory segment without read or write permissions
* create a large shared memory segment with read & write permissions
* loop if that option was specified
* call shmctl() using five different invalid cases
* check the errno value
* issue a PASS message if we get EACCES, EFAULT or EINVAL
* otherwise, the tests fails
* issue a FAIL message
* call cleanup
*
* HISTORY
* 03/2001 - Written by Wayne Boyer
* 04/2004 - Updated by Robbie Williamson
*/
#include <pwd.h>
#include <limits.h>
#include "hugetlb.h"
static size_t shm_size;
static int shm_id_1 = -1;
static int shm_id_2 = -1;
static int shm_id_3 = -1;
static struct shmid_ds buf;
static long hugepages = 128;
static struct tst_option options[] = {
{"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"},
{NULL, NULL, NULL}
};
struct tcase {
int *shmid;
int cmd;
struct shmid_ds *sbuf;
int error;
} tcases[] = {
/* EFAULT - IPC_SET & buf isn't valid */
{&shm_id_2, IPC_SET, (struct shmid_ds *)-1, EFAULT},
/* EFAULT - IPC_STAT & buf isn't valid */
{&shm_id_2, IPC_STAT, (struct shmid_ds *)-1, EFAULT},
/* EINVAL - the shmid is not valid */
{&shm_id_3, IPC_STAT, &buf, EINVAL},
/* EINVAL - the command is not valid */
{&shm_id_2, -1, &buf, EINVAL},
};
static void test_hugeshmctl(void)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(tcases); i++) {
TEST(shmctl(*(tcases[i].shmid), tcases[i].cmd, tcases[i].sbuf));
if (TST_RET != -1) {
tst_res(TFAIL, "shmctl succeeded "
"unexpectedly");
continue;
}
if (TST_ERR == tcases[i].error) {
tst_res(TPASS | TTERRNO, "shmctl failed "
"as expected");
} else {
tst_res(TFAIL | TTERRNO, "shmctl failed "
"unexpectedly - expect errno = "
"%d, got", tcases[i].error);
}
}
}
static void setup(void)
{
long hpage_size;
save_nr_hugepages();
if (nr_opt)
hugepages = SAFE_STRTOL(nr_opt, 0, LONG_MAX);
set_sys_tune("nr_hugepages", hugepages, 1);
hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
shm_size = hpage_size * (hugepages / 2);
update_shm_size(&shm_size);
shmkey = getipckey();
/* create a shared memory segment without read or write permissions */
shm_id_1 = shmget(shmkey, shm_size, SHM_HUGETLB | IPC_CREAT | IPC_EXCL);
if (shm_id_1 == -1)
tst_brk(TBROK | TERRNO, "shmget #1");
/* create a shared memory segment with read and write permissions */
shm_id_2 = shmget(shmkey + 1, shm_size,
SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
if (shm_id_2 == -1)
tst_brk(TBROK | TERRNO, "shmget #2");
}
static void cleanup(void)
{
rm_shm(shm_id_1);
rm_shm(shm_id_2);
restore_nr_hugepages();
}
static struct tst_test test = {
.needs_root = 1,
.needs_tmpdir = 1,
.options = options,
.setup = setup,
.cleanup = cleanup,
.test_all = test_hugeshmctl,
};