On Wed, Jan 17, 2024 at 1:57 PM Amery Hung <ameryhung@xxxxxxxxx> wrote:
>
> While eBPF qdisc uses NETLINK for attachment, expected_attach_type is
> required at load time to verify context access from different programs.
> This patch adds the section definition for this.
>
> Signed-off-by: Amery Hung <amery.hung@xxxxxxxxxxxxx>
> ---
> tools/lib/bpf/libbpf.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index e067be95da3c..0541f85b4ce6 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -8991,6 +8991,10 @@ static const struct bpf_sec_def section_defs[] = {
> SEC_DEF("struct_ops.s+", STRUCT_OPS, 0, SEC_SLEEPABLE),
> SEC_DEF("sk_lookup", SK_LOOKUP, BPF_SK_LOOKUP, SEC_ATTACHABLE),
> SEC_DEF("netfilter", NETFILTER, BPF_NETFILTER, SEC_NONE),
> + SEC_DEF("qdisc/enqueue", QDISC, BPF_QDISC_ENQUEUE, SEC_ATTACHABLE_OPT),
> + SEC_DEF("qdisc/dequeue", QDISC, BPF_QDISC_DEQUEUE, SEC_ATTACHABLE_OPT),
> + SEC_DEF("qdisc/reset", QDISC, BPF_QDISC_RESET, SEC_ATTACHABLE_OPT),
> + SEC_DEF("qdisc/init", QDISC, BPF_QDISC_INIT, SEC_ATTACHABLE_OPT),
seems like SEC_ATTACHABLE (or just 0) is what you want.
expected_attach_type shouldn't be optional for any new program type
> };
>
> int libbpf_register_prog_handler(const char *sec,
> --
> 2.20.1
>
>
