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tc: bpf: generalize pedit action

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existing TC action 'pedit' can munge any bits of the packet.
Generalize it for use in bpf programs attached as cls_bpf and act_bpf via
bpf_skb_store_bytes() helper function.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov
2015-03-26 19:53:57 -07:00
committed by David S. Miller
parent 7836b16c0d
commit 608cd71a9c
4 changed files with 73 additions and 2 deletions
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kernel/bpf/verifier.c
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@@ -773,6 +773,8 @@ static int check_func_arg(struct verifier_env *env, u32 regno,
expected_type = CONST_IMM;
} else if (arg_type == ARG_CONST_MAP_PTR) {
expected_type = CONST_PTR_TO_MAP;
} else if (arg_type == ARG_PTR_TO_CTX) {
expected_type = PTR_TO_CTX;
} else {
verbose("unsupported arg_type %d\n", arg_type);
return -EFAULT;