[LTP] [PATCH v4 2/6] syscalls/readahead02: abort test if readahead syscall fails

[Cyril Hrubis]

Hi!
> There is no reason to continue the test if readahead syscall fails
> and we can also check and report TCONF if filesystem does not support
> readahead.
> 
> Signed-off-by: Amir Goldstein <amir73il@gmail.com>
> ---
>  .../kernel/syscalls/readahead/readahead02.c   | 27 +++++++++----------
>  1 file changed, 12 insertions(+), 15 deletions(-)
> 
> diff --git a/testcases/kernel/syscalls/readahead/readahead02.c b/testcases/kernel/syscalls/readahead/readahead02.c
> index 956a1d5e5..88eb5fbff 100644
> --- a/testcases/kernel/syscalls/readahead/readahead02.c
> +++ b/testcases/kernel/syscalls/readahead/readahead02.c
> @@ -44,19 +44,6 @@ static struct tst_option options[] = {
>  	{NULL, NULL, NULL}
>  };
>  
> -static int check_ret(long expected_ret)
> -{
> -	if (expected_ret == TST_RET) {
> -		tst_res(TPASS, "expected ret success - "
> -			"returned value = %ld", TST_RET);
> -		return 0;
> -	}
> -	tst_res(TFAIL | TTERRNO, "unexpected failure - "
> -		"returned value = %ld, expected: %ld",
> -		TST_RET, expected_ret);
> -	return 1;
> -}
> -
>  static int has_file(const char *fname, int required)
>  {
>  	struct stat buf;
> @@ -162,8 +149,8 @@ static void read_testfile(int do_readahead, const char *fname, size_t fsize,
>  		do {
>  			TEST(readahead(fd, offset, fsize - offset));
>  			if (TST_RET != 0) {
> -				check_ret(0);
> -				break;
> +				SAFE_CLOSE(fd);
> +				return;
>  			}
>  
>  			/* estimate max readahead size based on first call */
> @@ -251,6 +238,16 @@ static void test_readahead(void)
>  	tst_res(TINFO, "read_testfile(1)");
>  	read_testfile(1, testfile, testfile_size, &read_bytes_ra,
>  		      &usec_ra, &cached_ra);
> +	if (TST_RET != 0) {
> +		if (TST_ERR == EINVAL) {
> +			tst_res(TCONF, "readahead not supported on %s",
> +				tst_device->fs_type);
> +		} else {
> +			tst_res(TFAIL | TTERRNO, "readahead failed on %s",
> +				tst_device->fs_type);
> +		}
> +		return;
> +	}

I do not like that we depend on the fact that TST_RET is not set
read_testfile() function. Can we rather than that explicitely return
the TST_ERR from the read_testfile() function instead? As it is zeroed
before the call in the TEST() macro we can just do return TST_ERR in the
read_testfile() and then ret = read_testfile() if (ret) ...

Also no need to resend, if you agree with the change I will fix that
before applying.

-- 
Cyril Hrubis
chrubis@suse.cz