/*
* 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
* hugeshmget01 - test that shmget() correctly creates a large
* shared memory segment
*
* HISTORY
* 03/2001 - Written by Wayne Boyer
* 04/2004 - Updated by Robbie Williamson
*/
#include <limits.h>
#include "hugetlb.h"
#include "hugetlb.h"
static size_t shm_size;
static int shm_id_1 = -1;
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}
};
static void test_hugeshmget(void)
{
struct shmid_ds buf;
if (shmctl(shm_id_1, IPC_STAT, &buf) == -1) {
tst_res(TFAIL | TERRNO, "shmctl(IPC_STAT)");
return;
}
if (buf.shm_segsz != shm_size) {
tst_res(TFAIL, "seqment size is not correct");
return;
}
if (buf.shm_cpid != getpid()) {
tst_res(TFAIL, "creator pid is not correct");
return;
}
if ((buf.shm_perm.mode & MODE_MASK) != ((SHM_RW) & MODE_MASK)) {
tst_res(TFAIL, "segment mode is not correct");
return;
}
tst_res(TPASS, "size, pid & mode are correct");
}
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();
shm_id_1 = shmget(shmkey, shm_size,
SHM_HUGETLB | IPC_CREAT | IPC_EXCL | SHM_RW);
if (shm_id_1 == -1)
tst_brk(TBROK | TERRNO, "shmget");
}
static void cleanup(void)
{
rm_shm(shm_id_1);
restore_nr_hugepages();
}
static struct tst_test test = {
.needs_root = 1,
.options = options,
.setup = setup,
.cleanup = cleanup,
.test_all = test_hugeshmget,
};