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References: <20240608021023.176027-1-jhubbard@nvidia.com> <20240608021023.176027-5-jhubbard@nvidia.com>
In-Reply-To: <20240608021023.176027-5-jhubbard@nvidia.com>
From: Jeff Xu <jeffxu@chromium.org>
Date: Mon, 10 Jun 2024 21:26:58 -0700
Message-ID: <CABi2SkXXrcZgrzsQ7=W1hHJiKKPY=ypW2g+PW1apVuWAAG1Mvg@mail.gmail.com>
Subject: Re: [PATCH 4/5] selftests/mm: mseal, self_elf: factor out test macros
 and other duplicated items
To: John Hubbard <jhubbard@nvidia.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Shuah Khan <shuah@kernel.org>, 
	Andrei Vagin <avagin@google.com>, Axel Rasmussen <axelrasmussen@google.com>, 
	Christian Brauner <brauner@kernel.org>, David Hildenbrand <david@redhat.com>, Kees Cook <kees@kernel.org>, 
	Kent Overstreet <kent.overstreet@linux.dev>, "Liam R . Howlett" <Liam.Howlett@oracle.com>, 
	Muhammad Usama Anjum <usama.anjum@collabora.com>, Peter Xu <peterx@redhat.com>, 
	Rich Felker <dalias@libc.org>, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, 
	LKML <linux-kernel@vger.kernel.org>
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On Fri, Jun 7, 2024 at 7:10=E2=80=AFPM John Hubbard <jhubbard@nvidia.com> w=
rote:
>
> Clean up and move some copy-pasted items into mseal_helpers.h.
>
> 1. The test macros can be made safer and simpler, by observing that they
> are invariably called when about to return. This means that the macros
> do not need an intrusive label to goto; they can simply return.
>
> 2. PKEY* items. We cannot, unfortunately use pkey-helpers.h. The best we
> can do is to factor out these few items into mseal_helpers.h.
>
> 3. These tests still need their own definition of u64, so also move that
> to the header file.
>
> Cc: Jeff Xu <jeffxu@chromium.org>
> Signed-off-by: John Hubbard <jhubbard@nvidia.com>

Reviewed-by: Jeff Xu <jeffxu@chromium.org>
Tested-by: Jeff Xu <jeffxu@chromium.org>

> ---
>  tools/testing/selftests/mm/mseal_helpers.h | 40 ++++++++++++++++++
>  tools/testing/selftests/mm/mseal_test.c    | 48 ----------------------
>  tools/testing/selftests/mm/seal_elf.c      | 32 ---------------
>  3 files changed, 40 insertions(+), 80 deletions(-)
>
> diff --git a/tools/testing/selftests/mm/mseal_helpers.h b/tools/testing/s=
elftests/mm/mseal_helpers.h
> index b922d453a014..8c3bf77dcf19 100644
> --- a/tools/testing/selftests/mm/mseal_helpers.h
> +++ b/tools/testing/selftests/mm/mseal_helpers.h
> @@ -3,3 +3,43 @@
>  #ifndef __NR_mseal
>  #define __NR_mseal 462
>  #endif
> +
> +#define FAIL_TEST_IF_FALSE(test_passed)                                 =
       \
> +       do {                                                            \
> +               if (!(test_passed)) {                                   \
> +                       ksft_test_result_fail("%s: line:%d\n",          \
> +                                               __func__, __LINE__);    \
> +                       return;                                         \
> +               }                                                       \
> +       } while (0)
> +
> +#define SKIP_TEST_IF_FALSE(test_passed)                                 =
       \
> +       do {                                                            \
> +               if (!(test_passed)) {                                   \
> +                       ksft_test_result_skip("%s: line:%d\n",          \
> +                                               __func__, __LINE__);    \
> +                       return;                                         \
> +               }                                                       \
> +       } while (0)
> +
> +#define TEST_END_CHECK() ksft_test_result_pass("%s\n", __func__)
> +
> +#ifndef PKEY_DISABLE_ACCESS
> +#define PKEY_DISABLE_ACCESS    0x1
> +#endif
> +
> +#ifndef PKEY_DISABLE_WRITE
> +#define PKEY_DISABLE_WRITE     0x2
> +#endif
> +
> +#ifndef PKEY_BITS_PER_PKEY
> +#define PKEY_BITS_PER_PKEY     2
> +#endif
> +
> +#ifndef PKEY_MASK
> +#define PKEY_MASK      (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE)
> +#endif
> +
> +#ifndef u64
> +#define u64 unsigned long long
> +#endif
> diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/self=
tests/mm/mseal_test.c
> index 20949617a036..a29935d82027 100644
> --- a/tools/testing/selftests/mm/mseal_test.c
> +++ b/tools/testing/selftests/mm/mseal_test.c
> @@ -19,54 +19,6 @@
>  #include <sys/stat.h>
>  #include "mseal_helpers.h"
>
> -/*
> - * need those definition for manually build using gcc.
> - * gcc -I ../../../../usr/include   -DDEBUG -O3  -DDEBUG -O3 mseal_test.=
c -o mseal_test
> - */
> -#ifndef PKEY_DISABLE_ACCESS
> -# define PKEY_DISABLE_ACCESS    0x1
> -#endif
> -
> -#ifndef PKEY_DISABLE_WRITE
> -# define PKEY_DISABLE_WRITE     0x2
> -#endif
> -
> -#ifndef PKEY_BITS_PER_PKEY
> -#define PKEY_BITS_PER_PKEY      2
> -#endif
> -
> -#ifndef PKEY_MASK
> -#define PKEY_MASK       (PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE)
> -#endif
> -
> -#define FAIL_TEST_IF_FALSE(c) do {\
> -               if (!(c)) {\
> -                       ksft_test_result_fail("%s, line:%d\n", __func__, =
__LINE__);\
> -                       goto test_end;\
> -               } \
> -       } \
> -       while (0)
> -
> -#define SKIP_TEST_IF_FALSE(c) do {\
> -               if (!(c)) {\
> -                       ksft_test_result_skip("%s, line:%d\n", __func__, =
__LINE__);\
> -                       goto test_end;\
> -               } \
> -       } \
> -       while (0)
> -
> -
> -#define TEST_END_CHECK() {\
> -               ksft_test_result_pass("%s\n", __func__);\
> -               return;\
> -test_end:\
> -               return;\
> -}
> -
> -#ifndef u64
> -#define u64 unsigned long long
> -#endif
> -
>  static unsigned long get_vma_size(void *addr, int *prot)
>  {
>         FILE *maps;
> diff --git a/tools/testing/selftests/mm/seal_elf.c b/tools/testing/selfte=
sts/mm/seal_elf.c
> index 4053951a535c..0fd129259647 100644
> --- a/tools/testing/selftests/mm/seal_elf.c
> +++ b/tools/testing/selftests/mm/seal_elf.c
> @@ -18,38 +18,6 @@
>  #include <sys/stat.h>
>  #include "mseal_helpers.h"
>
> -/*
> - * need those definition for manually build using gcc.
> - * gcc -I ../../../../usr/include   -DDEBUG -O3  -DDEBUG -O3 seal_elf.c =
-o seal_elf
> - */
> -#define FAIL_TEST_IF_FALSE(c) do {\
> -               if (!(c)) {\
> -                       ksft_test_result_fail("%s, line:%d\n", __func__, =
__LINE__);\
> -                       goto test_end;\
> -               } \
> -       } \
> -       while (0)
> -
> -#define SKIP_TEST_IF_FALSE(c) do {\
> -               if (!(c)) {\
> -                       ksft_test_result_skip("%s, line:%d\n", __func__, =
__LINE__);\
> -                       goto test_end;\
> -               } \
> -       } \
> -       while (0)
> -
> -
> -#define TEST_END_CHECK() {\
> -               ksft_test_result_pass("%s\n", __func__);\
> -               return;\
> -test_end:\
> -               return;\
> -}
> -
> -#ifndef u64
> -#define u64 unsigned long long
> -#endif
> -
>  /*
>   * define sys_xyx to call syscall directly.
>   */
> --
> 2.45.2
>