diff options
author | Marc-André Lureau <marcandre.lureau@redhat.com> | 2018-02-01 03:19:40 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-01 04:18:39 +0300 |
commit | 29f34d1dd6657a0c7da875deb57775c67ff6bd86 (patch) | |
tree | 0ad3f57f7202d5f74489adda3262155204365804 /tools/testing/selftests/memfd/common.c | |
parent | 3037aeb99134b0907fe0901055570a329b1f583d (diff) | |
download | linux-29f34d1dd6657a0c7da875deb57775c67ff6bd86.tar.xz |
memfd-test: move common code to a shared unit
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>
Diffstat (limited to 'tools/testing/selftests/memfd/common.c')
-rw-r--r-- | tools/testing/selftests/memfd/common.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/tools/testing/selftests/memfd/common.c b/tools/testing/selftests/memfd/common.c new file mode 100644 index 000000000000..8eb3d75f6e60 --- /dev/null +++ b/tools/testing/selftests/memfd/common.c @@ -0,0 +1,46 @@ +// 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); +} |