Re: [patch iproute2 2/2] tc: add support for BPF based actions

[Jiri Pirko <jiri@resnulli.us>]

Wed, Jan 07, 2015 at 07:50:47PM CET, cwang@twopensource.com wrote:
>On Wed, Jan 7, 2015 at 8:47 AM, Jiri Pirko <jiri@resnulli.us> wrote:
>> +       fprintf(stderr, "Usage: ... bpf ...\n");
>> +       fprintf(stderr, "\n");
>> +       fprintf(stderr, " [inline]:     run bytecode BPF_BYTECODE\n");
>> +       fprintf(stderr, " [from file]:  run bytecode-file FILE\n");
>> +       fprintf(stderr, "\n");
>> +       fprintf(stderr, "Where BPF_BYTECODE := \'s,c t f k,c t f k,c t f k,...\'\n");
>> +       fprintf(stderr, "      c,t,f,k and s are decimals; s denotes number of 4-tuples\n");
>> +       fprintf(stderr, "Where FILE points to a file containing the BPF_BYTECODE string\n");
>> +       fprintf(stderr, "\nACTION_SPEC := ... look at individual actions\n");
>> +       fprintf(stderr, "NOTE: CLASSID is parsed as hexadecimal input.\n");
>
>Can we just use BPF transparently for gact?

Why to squash it there? I think it is much clearer to do this
separatelly.

>It is never user-friendly to
>use this kind of bytecode even though I know there is a tool to "compile"
>BPF.

Please see cls_bpf. It's already in-tree for some time. act_bpf just
completes this.