Messages in this thread Patch in this message | | | From | Maciej Żenczykowski <> | Subject | [PATCH] net: bpf: Allow TC programs to call BPF_FUNC_skb_change_head | Date | Mon, 20 Apr 2020 11:34:08 -0700 |
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From: Lorenzo Colitti <lorenzo@google.com>
This allows TC eBPF programs to modify and forward (redirect) packets from interfaces without ethernet headers (for example cellular) to interfaces with (for example ethernet/wifi).
The lack of this appears to simply be an oversight.
Tested: in active use in Android R on 4.14+ devices for ipv6 cellular to wifi tethering offload.
Signed-off-by: Lorenzo Colitti <lorenzo@google.com> Signed-off-by: Maciej Żenczykowski <maze@google.com> --- net/core/filter.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/core/filter.c b/net/core/filter.c index 7d6ceaa54d21..755867867e57 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -6213,6 +6213,8 @@ tc_cls_act_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) return &bpf_skb_adjust_room_proto; case BPF_FUNC_skb_change_tail: return &bpf_skb_change_tail_proto; + case BPF_FUNC_skb_change_head: + return &bpf_skb_change_head_proto; case BPF_FUNC_skb_get_tunnel_key: return &bpf_skb_get_tunnel_key_proto; case BPF_FUNC_skb_set_tunnel_key: -- 2.26.1.301.g55bc3eb7cb9-goog
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