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29f34d1dd6
The memfd & fuse tests will share more common code in the following commits to test hugetlb support. Link: http://lkml.kernel.org/r/20171107122800.25517-9-marcandre.lureau@redhat.com Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
47 lines
814 B
C
47 lines
814 B
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#define __EXPORTED_HEADERS__
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#include <stdio.h>
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#include <stdlib.h>
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#include <linux/fcntl.h>
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#include <linux/memfd.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include "common.h"
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int hugetlbfs_test = 0;
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/*
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* Copied from mlock2-tests.c
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*/
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unsigned long default_huge_page_size(void)
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{
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unsigned long hps = 0;
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char *line = NULL;
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size_t linelen = 0;
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FILE *f = fopen("/proc/meminfo", "r");
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if (!f)
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return 0;
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while (getline(&line, &linelen, f) > 0) {
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if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
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hps <<= 10;
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break;
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}
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}
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free(line);
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fclose(f);
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return hps;
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}
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int sys_memfd_create(const char *name, unsigned int flags)
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{
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if (hugetlbfs_test)
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flags |= MFD_HUGETLB;
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return syscall(__NR_memfd_create, name, flags);
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}
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