103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) International Business Machines Corp., 2004
|
|
* Copyright (c) Linux Test Project, 2004-2017
|
|
*
|
|
* Test Name: hugemmap01
|
|
*
|
|
* Test Description:
|
|
* Verify that, mmap() succeeds when used to map a file in a hugetlbfs.
|
|
*
|
|
* Expected Result:
|
|
* mmap() should succeed returning the address of the hugetlb mapped region.
|
|
* The number of free huge pages should decrease.
|
|
*
|
|
* Test:
|
|
* Loop if the proper options are given.
|
|
* Execute system call
|
|
* Check return code, if system call failed (return=-1)
|
|
* Log the errno and Issue a FAIL message.
|
|
*
|
|
* HISTORY
|
|
* 04/2004 Written by Robbie Williamson
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/mount.h>
|
|
#include <limits.h>
|
|
#include <sys/param.h>
|
|
#include "hugetlb.h"
|
|
|
|
static long *addr;
|
|
static int fildes;
|
|
static long beforetest;
|
|
static long aftertest;
|
|
static long hugepagesmapped;
|
|
static char TEMPFILE[MAXPATHLEN];
|
|
|
|
static void test_hugemmap(void)
|
|
{
|
|
long page_sz = 0;
|
|
|
|
fildes = SAFE_OPEN(TEMPFILE, O_RDWR | O_CREAT, 0666);
|
|
|
|
beforetest = SAFE_READ_MEMINFO("HugePages_Free:");
|
|
|
|
page_sz = SAFE_READ_MEMINFO("Hugepagesize:") * 1024;
|
|
|
|
addr = mmap(NULL, page_sz, PROT_READ | PROT_WRITE,
|
|
MAP_SHARED, fildes, 0);
|
|
|
|
if (addr == MAP_FAILED) {
|
|
tst_res(TFAIL | TERRNO, "mmap() Failed on %s",
|
|
TEMPFILE);
|
|
} else {
|
|
tst_res(TPASS, "call succeeded");
|
|
|
|
/* force to allocate page and change HugePages_Free */
|
|
*(int *)addr = 0;
|
|
/* Make sure the number of free huge pages AFTER testing decreased */
|
|
aftertest = SAFE_READ_MEMINFO("HugePages_Free:");
|
|
hugepagesmapped = beforetest - aftertest;
|
|
if (hugepagesmapped < 1)
|
|
tst_res(TWARN, "Number of HUGEPAGES_FREE stayed the"
|
|
" same. Okay if multiple copies running due"
|
|
" to test collision.");
|
|
munmap(addr, page_sz);
|
|
}
|
|
|
|
close(fildes);
|
|
}
|
|
|
|
void setup(void)
|
|
{
|
|
if (tst_hugepages == 0)
|
|
tst_brk(TCONF, "Not enough hugepages for testing.");
|
|
|
|
if (!Hopt)
|
|
Hopt = tst_get_tmpdir();
|
|
SAFE_MOUNT("none", Hopt, "hugetlbfs", 0, NULL);
|
|
|
|
snprintf(TEMPFILE, sizeof(TEMPFILE), "%s/mmapfile%d", Hopt, getpid());
|
|
}
|
|
|
|
void cleanup(void)
|
|
{
|
|
unlink(TEMPFILE);
|
|
umount(Hopt);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.needs_root = 1,
|
|
.needs_tmpdir = 1,
|
|
.options = (struct tst_option[]) {
|
|
{"H:", &Hopt, "-H /.. Location of hugetlbfs, i.e. -H /var/hugetlbfs"},
|
|
{"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"},
|
|
{}
|
|
},
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
.test_all = test_hugemmap,
|
|
.request_hugepages = 128,
|
|
};
|