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| author | Lorenzo Colitti <lorenzo@google.com> | 2020-04-20 11:34:08 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-04-26 09:00:50 -0700 |
| commit | 6f3f65d80dac8f2bafce2213005821fccdce194c (patch) | |
| tree | 84e4007084a04076e2386d939cc07c915d37b231 | |
| parent | 6890896bd765b0504761c61901c9804fca23bfb2 (diff) | |
| download | linux-stable-6f3f65d80dac8f2bafce2213005821fccdce194c.tar.gz linux-stable-6f3f65d80dac8f2bafce2213005821fccdce194c.tar.bz2 linux-stable-6f3f65d80dac8f2bafce2213005821fccdce194c.zip | |
net: bpf: Allow TC programs to call BPF_FUNC_skb_change_head
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>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | net/core/filter.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index a605626142b6..da3b7a72c37c 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -6137,6 +6137,8 @@ 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: |