[LTP] [PATCH 2/7] Add lsm_get_self_attr01 test

[Andrea Cervesato]

Hi Petr,

On 12/18/24 19:55, Petr Vorel wrote:
> Also, kselftest test tools/testing/selftests/lsm/lsm_get_self_attr_test.c is
> testing also for ctx being NULL. Then it would make sense to use it.

Now I remember why I skipped this part. The kselftest is checking in 
this way (that's how library works apparently):

TEST(ctx_null_lsm_get_self_attr)
{
     const long page_size = sysconf(_SC_PAGESIZE);
     __u32 size = page_size;
     int rc;

     rc = lsm_get_self_attr(LSM_ATTR_CURRENT, NULL, &size, 0);

     if (attr_lsm_count()) {
         ASSERT_NE(-1, rc);
         ASSERT_NE(1, size);
     } else {
         ASSERT_EQ(-1, rc);
     }
}

If there are LSM implementations in the system, "lsm_get_self_attr" 
won't return any error code but 0.
If there are NOT implementations, the syscall will return -1.

Andrea