// SPDX-License-Identifier: GPL-2.0 | |
#define _GNU_SOURCE | |
#define __EXPORTED_HEADERS__ | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <linux/fcntl.h> | |
#include <linux/memfd.h> | |
#include <unistd.h> | |
#include <sys/syscall.h> | |
#include "common.h" | |
int hugetlbfs_test = 0; | |
/* | |
* Copied from mlock2-tests.c | |
*/ | |
unsigned long default_huge_page_size(void) | |
{ | |
unsigned long hps = 0; | |
char *line = NULL; | |
size_t linelen = 0; | |
FILE *f = fopen("/proc/meminfo", "r"); | |
if (!f) | |
return 0; | |
while (getline(&line, &linelen, f) > 0) { | |
if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) { | |
hps <<= 10; | |
break; | |
} | |
} | |
free(line); | |
fclose(f); | |
return hps; | |
} | |
int sys_memfd_create(const char *name, unsigned int flags) | |
{ | |
if (hugetlbfs_test) | |
flags |= MFD_HUGETLB; | |
return syscall(__NR_memfd_create, name, flags); | |
} |