On Fri, Apr 19, 2019 at 12:32 PM rjmccabe3701
<robert.mcc...@rockwellcollins.com> wrote:
>
> From: "McCabe, Robert J" <robert.mcc...@rockwellcollins.com>
>
> The BPF_PROG_LOAD condition for kernel version <= 5.1 is
>
> log->len_total > UINT_MAX >> 8 /* (16 * 1024 * 1024) - 1 */
>
> Signed-off-by: McCabe, Robert J <robert.mcc...@rockwellcollins.com>
Acked-by: Yonghong Song <y...@fb.com>
> ---
> tools/lib/bpf/bpf.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
> index bc30783d1403..62d67caa7aea 100644
> --- a/tools/lib/bpf/bpf.h
> +++ b/tools/lib/bpf/bpf.h
> @@ -92,7 +92,7 @@ struct bpf_load_program_attr {
> #define MAPS_RELAX_COMPAT 0x01
>
> /* Recommend log buffer size */
> -#define BPF_LOG_BUF_SIZE (16 * 1024 * 1024) /* verifier maximum in kernels
> <= 5.1 */
> +#define BPF_LOG_BUF_SIZE ((16 * 1024 * 1024) - 1) /* verifier maximum in
> kernels <= 5.1 */
> LIBBPF_API int
> bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
> char *log_buf, size_t log_buf_sz);
> --
> 2.17.1
>
