[PATCH v4] selftests/landlock:Fix two build issues

[PATCH v4] selftests/landlock:Fix two build issues

[Hu Yadi]

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,
         ^~~~~~~

Fixes: 04f9070e99a4 ("selftests/landlock: Add tests for pseudo filesystems")
Fixes: a549d055a22e ("selftests/landlock: Add network tests")

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 v4 -> v3:
  fix gettid error from kernel test robot
  https://lore.kernel.org/oe-kbuild-all/202401151147.T1s11iHJ-lkp@intel.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 | 7 ++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

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",
+	},
 	.file_path = file1_s1d1,
 };

diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
index 929e21c4db05..d50f2920ed82 100644
--- a/tools/testing/selftests/landlock/net_test.c
+++ b/tools/testing/selftests/landlock/net_test.c
@@ -21,6 +21,11 @@

 #include "common.h"

+static pid_t landlock_gettid(void)
+{
+        return syscall(__NR_gettid);
+}
+
 const short sock_port_start = (1 << 10);

 static const char loopback_ipv4[] = "127.0.0.1";
@@ -88,7 +93,7 @@ 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%d-index%d", landlock_gettid(),
 			index);
 		srv->unix_addr_len = SUN_LEN(&srv->unix_addr);
 		srv->unix_addr.sun_path[0] = '\0';
--
2.23.0

Re: [PATCH v4] selftests/landlock:Fix two build issues

[Mickaël Salaün]

On Mon, Jan 15, 2024 at 06:24:09PM +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,
>          ^~~~~~~
> 
> Fixes: 04f9070e99a4 ("selftests/landlock: Add tests for pseudo filesystems")
> Fixes: a549d055a22e ("selftests/landlock: Add network tests")

Could you please create two patches as requested for v3, one per fix?
This is useful because it enables to backport these fixes when
appropriate.

> 
> 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 v4 -> v3:
>   fix gettid error from kernel test robot
>   https://lore.kernel.org/oe-kbuild-all/202401151147.T1s11iHJ-lkp@intel.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 | 7 ++++++-
>  2 files changed, 10 insertions(+), 2 deletions(-)
> 
> 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",
> +	},

I requested some changes here.

>  	.file_path = file1_s1d1,
>  };
> 
> diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c
> index 929e21c4db05..d50f2920ed82 100644
> --- a/tools/testing/selftests/landlock/net_test.c
> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -21,6 +21,11 @@

We should include sys/syscall.h

> 
>  #include "common.h"
> 
> +static pid_t landlock_gettid(void)

Please rename to sys_gettid().

> +{
> +        return syscall(__NR_gettid);
> +}
> +
>  const short sock_port_start = (1 << 10);
> 
>  static const char loopback_ipv4[] = "127.0.0.1";
> @@ -88,7 +93,7 @@ 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%d-index%d", landlock_gettid(),
>  			index);
>  		srv->unix_addr_len = SUN_LEN(&srv->unix_addr);
>  		srv->unix_addr.sun_path[0] = '\0';
> --
> 2.23.0
> 

回复: [PATCH v4] selftests/landlock:Fix two build issues

[Huyadi]

> On Mon, Jan 15, 2024 at 06:24:09PM +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,
>>          ^~~~~~~
>> 
>> Fixes: 04f9070e99a4 ("selftests/landlock: Add tests for pseudo 
>> filesystems")
>> Fixes: a549d055a22e ("selftests/landlock: Add network tests")
>
>Could you please create two patches as requested for v3, one per fix?
>This is useful because it enables to backport these fixes when appropriate.

OK, I'll resend it by two patches with your warmly instruction.
Thanks again.

>> 
>> 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 v4 -> v3:
>>   fix gettid error from kernel test robot
>>   
>> https://lore.kernel.org/oe-kbuild-all/202401151147.T1s11iHJ-lkp@intel.
>> 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 | 7 ++++++-
>>  2 files changed, 10 insertions(+), 2 deletions(-)
>> 
>> 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",
>> +	},
>
>I requested some changes here.
>
>>  	.file_path = file1_s1d1,
>>  };
>> 
>> diff --git a/tools/testing/selftests/landlock/net_test.c 
>> b/tools/testing/selftests/landlock/net_test.c
>> index 929e21c4db05..d50f2920ed82 100644
>> --- a/tools/testing/selftests/landlock/net_test.c
>> +++ b/tools/testing/selftests/landlock/net_test.c
> @@ -21,6 +21,11 @@
>
>We should include sys/syscall.h
>
>> 
>>  #include "common.h"
>> 
>> +static pid_t landlock_gettid(void)
>
>Please rename to sys_gettid().
>
>> +{
>> +        return syscall(__NR_gettid);
>> +}
>> +
>>  const short sock_port_start = (1 << 10);
>> 
>>  static const char loopback_ipv4[] = "127.0.0.1"; @@ -88,7 +93,7 @@ 
>> 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%d-index%d", landlock_gettid(),
>>  			index);
>>  		srv->unix_addr_len = SUN_LEN(&srv->unix_addr);
>>  		srv->unix_addr.sun_path[0] = '\0';
>> --
>> 2.23.0
>>

回复: [PATCH v4] selftests/landlock:Fix two build issues

[Huyadi]

>> 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 | 7 ++++++-
>>  2 files changed, 10 insertions(+), 2 deletions(-)
>> 
>> 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",
>> +	},
>
>I requested some changes here.
>

Could you give me some inspiration how to fix it? 
it looks fine to me to assign value as above, which consistent with other pseudo FS tests.
Thanks in advance.

>>  	.file_path = file1_s1d1,
>>  };
>> 
  

Re: 回复: [PATCH v4] selftests/landlock:Fix two build issues

[Mickaël Salaün]

On Tue, Jan 23, 2024 at 12:04:17PM +0000, Huyadi wrote:
> 
> >> 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 | 7 ++++++-
> >>  2 files changed, 10 insertions(+), 2 deletions(-)
> >> 
> >> 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",
> >> +	},
> >
> >I requested some changes here.
> >
> 
> Could you give me some inspiration how to fix it? 
> it looks fine to me to assign value as above, which consistent with other pseudo FS tests.
> Thanks in advance.

Just add and use this for the two tmpfs data:
#define MNT_TMP_DATA "size=4m,mode=700"

You can also make the mnt_tmp variable static const.


> 
> >>  	.file_path = file1_s1d1,
> >>  };
> >> 
>   

回复: 回复: [PATCH v4] selftests/landlock:Fix two build issues

[Huyadi]

>On Tue, Jan 23, 2024 at 12:04:17PM +0000, Huyadi wrote:
>> 
>> >> 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 | 7 ++++++-
>> >>  2 files changed, 10 insertions(+), 2 deletions(-)
>> >> 
>> >> 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",
>> >> +	},
>> >
>> >I requested some changes here.
>> >
>> 
>> Could you give me some inspiration how to fix it? 
>> it looks fine to me to assign value as above, which consistent with other pseudo FS tests.
>> Thanks in advance.
>
>Just add and use this for the two tmpfs data:
>#define MNT_TMP_DATA "size=4m,mode=700"
>
>You can also make the mnt_tmp variable static const.


static const is not useful for the case, the errot still, and I'll use macro definition to solve it.
thanks your warmly instruction,I'll send next version , please help to review it.


> 
> >>  	.file_path = file1_s1d1,
> >>  };
> >> 
>