On Fri, Jan 12, 2024 at 03:12:45PM +0800, Hu Yadi wrote:

From: "Hu.Yadi" hu.yadi@h3c.com

Two issues comes up while building selftest/landlock on my side (gcc 7.3/glibc-2.28/kernel-4.19)

the first one is as to gettid

net_test.c: In function ‘set_service’: net_test.c:91:45: warning: implicit declaration of function ‘gettid’; [-Wimplicit-function-declaration] "_selftests-landlock-net-tid%d-index%d", gettid(), ^~~~~~ getgid net_test.c:(.text+0x4e0): undefined reference to `gettid'

the second is compiler error gcc -Wall -O2 -isystem fs_test.c -lcap -o selftests/landlock/fs_test fs_test.c:4575:9: error: initializer element is not constant .mnt = mnt_tmp, ^~~~~~~

this patch is to fix them

Signed-off-by: Hu.Yadi hu.yadi@h3c.com Suggested-by: Jiao jiaoxupo@h3c.com Reviewed-by: Berlin berlin@h3c.com

---

Changes v3 -> v2:

• add helper of gettid instead of __NR_gettid
• add gcc/glibc version info in comments

Changes v1 -> v2:

• fix whitespace error
• replace SYS_gettid with _NR_gettid

tools/testing/selftests/landlock/fs_test.c | 5 ++++- tools/testing/selftests/landlock/net_test.c | 9 +++++++++ 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c index 18e1f86a6234..a992cf7c0ad1 100644 --- a/tools/testing/selftests/landlock/fs_test.c +++ b/tools/testing/selftests/landlock/fs_test.c @@ -4572,7 +4572,10 @@ FIXTURE_VARIANT(layout3_fs) /* clang-format off */ FIXTURE_VARIANT_ADD(layout3_fs, tmpfs) { /* clang-format on */

• .mnt = mnt_tmp,

• .mnt = {

• .type = "tmpfs",
  

• .data = "size=4m,mode=700",
  

OK, C doesn't play nice with constants. A better approach would be to define MNT_TMP_DATA, and use it with this fixture variant and the mnt_tmp variable. No need for a MNT_TMP_TYPE though. While you're at it, you can also make the mnt_tmp variable static const.

You can create two patches from this one. This first hunk with:

Fixes: 04f9070e99a4 ("selftests/landlock: Add tests for pseudo filesystems")

• }, .file_path = file1_s1d1,

}; diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c index 929e21c4db05..12a6744568e2 100644 --- a/tools/testing/selftests/landlock/net_test.c +++ b/tools/testing/selftests/landlock/net_test.c @@ -21,6 +21,15 @@ #include "common.h"

...and this second hunk for another patch with:

Fixes: a549d055a22e ("selftests/landlock: Add network tests") Cc: Konstantin Meskhidze konstantin.meskhidze@huawei.com

+#ifndef gettid +static pid_t gettid(void) +{

•    return syscall(__NR_gettid);
  

+}

Please remove this newline.

+#endif

You can move this gettid hunk to common.h, under the landlock_restrict_self block.

const short sock_port_start = (1 << 10); static const char loopback_ipv4[] = "127.0.0.1"; -- 2.23.0