| 1 | |
| 2 | #define _GNU_SOURCE
|
| 3 | #define __EXPORTED_HEADERS__
|
| 4 |
|
| 5 | #include <stdio.h>
|
| 6 | #include <stdlib.h>
|
| 7 | #include <linux/fcntl.h>
|
| 8 | #include <linux/memfd.h>
|
| 9 | #include <unistd.h>
|
| 10 | #include <sys/syscall.h>
|
| 11 |
|
| 12 | #include "common.h"
|
| 13 |
|
| 14 | int hugetlbfs_test = 0;
|
| 15 |
|
| 16 | |
| 17 | * Copied from mlock2-tests.c
|
| 18 |
|
| 19 | unsigned long default_huge_page_size(void)
|
| 20 | {
|
| 21 | unsigned long hps = 0;
|
| 22 | char *line = NULL;
|
| 23 | size_t linelen = 0;
|
| 24 | FILE *f = fopen("/proc/meminfo", "r");
|
| 25 |
|
| 26 | if (!f)
|
| 27 | return 0;
|
| 28 | while (getline(&line, &linelen, f) > 0) {
|
| 29 | if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
|
| 30 | hps <<= 10;
|
| 31 | break;
|
| 32 | }
|
| 33 | }
|
| 34 |
|
| 35 | free(line);
|
| 36 | fclose(f);
|
| 37 | return hps;
|
| 38 | }
|
| 39 |
|
| 40 | int sys_memfd_create(const char *name, unsigned int flags)
|
| 41 | {
|
| 42 | if (hugetlbfs_test)
|
| 43 | flags |= MFD_HUGETLB;
|
| 44 |
|
| 45 | return syscall(__NR_memfd_create, name, flags);
|
| 46 | }
|