1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #define _GNU_SOURCE |
3 | #define |
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 | } |
47 | |