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Date: Wed, 10 Jan 2024 18:45:43 +0100
From: Mickaël Salaün <mic@...ikod.net>
To: Hu Yadi <hu.yadi@....com>
Cc: jmorris@...ei.org, serge@...lyn.com, shuah@...nel.org, 
	mathieu.desnoyers@...icios.com, linux-api@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-security-module@...r.kernel.org, linux-kselftest@...r.kernel.org, 514118380@...com, 
	berlin@....com
Subject: Re: [PATCH] selftests/landlock:Fix two build issues

On Wed, Jan 10, 2024 at 03:08:54PM +0800, Hu Yadi wrote:
> From: "Hu.Yadi" <hu.yadi@....com>
> 
> Two issues comes up  while building selftest/landlock:
> 
> 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’; did you mean ‘getgid’? [-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 /home/linux/tools/testing/selftests/landlock/fs_test
> fs_test.c:4575:9: error: initializer element is not constant
>   .mnt = mnt_tmp,
>          ^~~~~~~

What is the version of GCC (and headers) and on which system (and
version) are you building these tests?

> 
> this patch is to fix them
> 
> Signed-off-by: Hu.Yadi <hu.yadi@....com>
> Suggested-by: Jiao <jiaoxupo@....com>
> Reviewed-by:Berlin <berlin@....com>
> ---
>  tools/testing/selftests/landlock/fs_test.c  | 5 ++++-
>  tools/testing/selftests/landlock/net_test.c | 3 +--
>  2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c
> index 18e1f86a6234..93eb40a09073 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",

When applying this patch we get: "space before tab in indent"

> +	},
>  	.file_path = file1_s1d1,
>  };
>  
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index 929e21c4db05..8fb357de8c55 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -18,7 +18,6 @@
>  #include <sys/prctl.h>
>  #include <sys/socket.h>
>  #include <sys/un.h>
> -
>  #include "common.h"
>  
>  const short sock_port_start = (1 << 10);
> @@ -88,7 +87,7 @@ static int set_service(struct service_fixture *const srv,
>  	case AF_UNIX:
>  		srv->unix_addr.sun_family = prot.domain;
>  		sprintf(srv->unix_addr.sun_path,
> -			"_selftests-landlock-net-tid%d-index%d", gettid(),
> +			"_selftests-landlock-net-tid%ld-index%d", syscall(SYS_gettid),

You sent another patch that "replace SYS_<syscall> with __NR_<syscall>".
Why not here?

Please follow the same approach:
https://git.kernel.org/stable/c/87129ef13603ae46c82bcd09eed948acf0506dbb

>  			index);
>  		srv->unix_addr_len = SUN_LEN(&srv->unix_addr);
>  		srv->unix_addr.sun_path[0] = '\0';
> -- 
> 2.23.0
> 
> 

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