[LTP] [PATCH] syscalls/copy_file_range02.c: Compatible with new and old kernels

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> The patch as follows:
> commit 11cbfb10775a ("vfs: deny copy_file_range() for non regular files")
> 
> Signed-off-by: Jinhui huang <huangjh.jy@cn.fujitsu.com>
> ---
>  .../syscalls/copy_file_range/copy_file_range02.c   | 33 +++++++++++++++-------
>  1 file changed, 23 insertions(+), 10 deletions(-)
> 
> diff --git a/testcases/kernel/syscalls/copy_file_range/copy_file_range02.c b/testcases/kernel/syscalls/copy_file_range/copy_file_range02.c
> index 07c0207..9e6356c 100644
> --- a/testcases/kernel/syscalls/copy_file_range/copy_file_range02.c
> +++ b/testcases/kernel/syscalls/copy_file_range/copy_file_range02.c
> @@ -54,19 +54,32 @@ static void verify_copy_file_range(unsigned int n)
>  	TEST(sys_copy_file_range(fd_src, 0, *tc->copy_to_fd,
>  				0, CONTSIZE, tc->flags));
>  
> -	if (TST_RET == -1) {
> -		if (tc->exp_err == TST_ERR) {
> +	if (TST_RET != -1) {
> +		tst_res(TFAIL,
> +			"copy_file_range returned wrong value: %ld", TST_RET);
> +		return;
> +	}
> +
> +	if (tc->exp_err == TST_ERR) {
> +		tst_res(TPASS | TTERRNO,
> +			"copy_file_range failed as expected");
> +	} else {
> +		/* copy_file_range() returned EISDIR when copyed contents to
> +		 * directory on new kernels, but on old kernels, it returned
> +		 * EBADF.
> +		 *
> +		 * the patch as follws:
> +		 * commit 11cbfb10775a ("vfs: deny copy_file_range() for non regular files")
> +		 */
> +		if (tc->exp_err == EISDIR && TST_ERR == EBADF) {
>  			tst_res(TPASS | TTERRNO,
> -					"copy_file_range failed as expected");

If nothing else this should be guarded by kernel version check because
if new kernel starts to return EBADFD again, that would be regression.

So we should check the kernel version in test setup and set a flag that
would be checked here as well.

-- 
Cyril Hrubis
chrubis@suse.cz