[LTP] [PATCH 11/13] Hugetlb: Migrating libhugetlbfs shared

[Li Wang]

On Sun, Dec 25, 2022 at 11:43 PM Tarun Sahu <tsahu@linux.ibm.com> wrote:

> Migrating the libhugetlbfs/testcases/shared.c test
>
> Test Description: This test is basic shared mapping test. Two shared
> mappings are created with same offset on a file. It checks if writing
> to one mapping can be seen to other mapping or not?
>
> Signed-off-by: Tarun Sahu <tsahu@linux.ibm.com>
>

Reviewed-by: Li Wang <liwang@redhat.com>

> ---
>  runtest/hugetlb                               |  1 +
>  testcases/kernel/mem/.gitignore               |  1 +
>  .../kernel/mem/hugetlb/hugemmap/hugemmap31.c  | 84 +++++++++++++++++++
>  3 files changed, 86 insertions(+)
>  create mode 100644 testcases/kernel/mem/hugetlb/hugemmap/hugemmap31.c
>
> diff --git a/runtest/hugetlb b/runtest/hugetlb
> index 60cca4eb7..33fd384b4 100644
> --- a/runtest/hugetlb
> +++ b/runtest/hugetlb
> @@ -31,6 +31,7 @@ hugemmap27 hugemmap27
>  hugemmap28 hugemmap28
>  hugemmap29 hugemmap29
>  hugemmap30 hugemmap30
> +hugemmap31 hugemmap31
>  hugemmap05_1 hugemmap05 -m
>  hugemmap05_2 hugemmap05 -s
>  hugemmap05_3 hugemmap05 -s -m
> diff --git a/testcases/kernel/mem/.gitignore
> b/testcases/kernel/mem/.gitignore
> index bb9720452..8375389cd 100644
> --- a/testcases/kernel/mem/.gitignore
> +++ b/testcases/kernel/mem/.gitignore
> @@ -30,6 +30,7 @@
>  /hugetlb/hugemmap/hugemmap28
>  /hugetlb/hugemmap/hugemmap29
>  /hugetlb/hugemmap/hugemmap30
> +/hugetlb/hugemmap/hugemmap31
>  /hugetlb/hugeshmat/hugeshmat01
>  /hugetlb/hugeshmat/hugeshmat02
>  /hugetlb/hugeshmat/hugeshmat03
> diff --git a/testcases/kernel/mem/hugetlb/hugemmap/hugemmap31.c
> b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap31.c
> new file mode 100644
> index 000000000..a09905023
> --- /dev/null
> +++ b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap31.c
> @@ -0,0 +1,84 @@
> +// SPDX-License-Identifier: LGPL-2.1-or-later
> +/*
> + * Copyright (C) 2005-2006 IBM Corporation.
> + * Author: David Gibson & Adam Litke
> + */
> +
> +/*\
> + * [Description]
> + *
> + * This test is basic shared mapping test. Two shared mappings are created
> + * with same offset on a file. It checks if writing to one mapping can be
> + * seen to other mapping or not?
> + */
> +
> +#define _GNU_SOURCE
> +#include <stdio.h>
> +#include <sys/mount.h>
> +#include <limits.h>
> +#include <sys/param.h>
> +#include <setjmp.h>
> +#include <sys/types.h>
> +
> +#include "hugetlb.h"
> +
> +#define RANDOM_CONSTANT        0x1234ABCD
> +#define MNTPOINT "hugetlbfs/"
> +
> +static long hpage_size;
> +static int fd = -1;
> +
> +static void run_test(void)
> +{
> +       void *p, *q;
> +       unsigned long *pl, *ql;
> +       unsigned long i;
> +
> +       fd = tst_creat_unlinked(MNTPOINT, 0);
> +       p = SAFE_MMAP(NULL, hpage_size, PROT_READ|PROT_WRITE, MAP_SHARED,
> +                fd, 0);
> +
> +       q = SAFE_MMAP(NULL, hpage_size, PROT_READ|PROT_WRITE, MAP_SHARED,
> +                fd, 0);
> +
> +       pl = p;
> +       for (i = 0; i < (hpage_size / sizeof(*pl)); i++)
> +               pl[i] = RANDOM_CONSTANT ^ i;
> +
> +       ql = q;
> +       for (i = 0; i < (hpage_size / sizeof(*ql)); i++) {
> +               if (ql[i] != (RANDOM_CONSTANT ^ i)) {
> +                       tst_res(TFAIL, "Mismatch at offset %lu, Got: %lu,
> Expected: %lu",
> +                                       i, ql[i], RANDOM_CONSTANT ^ i);
> +                       goto cleanup;
> +               }
> +       }
> +
> +       tst_res(TPASS, "Successfully tested data between two shared
> mappings");
> +cleanup:
> +       SAFE_MUNMAP(p, hpage_size);
> +       SAFE_MUNMAP(q, hpage_size);
> +       SAFE_CLOSE(fd);
> +}
> +
> +static void setup(void)
> +{
> +       hpage_size = SAFE_READ_MEMINFO(MEMINFO_HPAGE_SIZE)*1024;
> +}
> +
> +static void cleanup(void)
> +{
> +       if (fd >= 0)
> +               SAFE_CLOSE(fd);
> +}
> +
> +static struct tst_test test = {
> +       .needs_root = 1,
> +       .mntpoint = MNTPOINT,
> +       .needs_hugetlbfs = 1,
> +       .needs_tmpdir = 1,
> +       .setup = setup,
> +       .cleanup = cleanup,
> +       .test_all = run_test,
> +       .hugepages = {2, TST_NEEDS},
> +};
> --
> 2.31.1
>
>

-- 
Regards,
Li Wang