Re: [iovisor-dev] Question about backward jump in bpf

Thanks for the classification. On Tue, Oct 3, 2017 at 11:30 PM, Alexei Starovoitov < alexei.starovoi...@gmail.com> wrote: > On Tue, Oct 3, 2017 at 9:26 PM, zhiting zhu via iovisor-dev > wrote: > > Hi, > > > > What's the use case for backward jump of ebpf? The

Re: [iovisor-dev] Question about backward jump in bpf

On Tue, Oct 3, 2017 at 9:26 PM, zhiting zhu via iovisor-dev wrote: > Hi, > > What's the use case for backward jump of ebpf? The verifier will reject the > backward edge which makes the backward jump not useful. Am I missing > something? > > Also, from what I read

[iovisor-dev] Question about backward jump in bpf

Hi, What's the use case for backward jump of ebpf? The verifier will reject the backward edge which makes the backward jump not useful. Am I missing something? Also, from what I read online, some slides said ebpf allows backward jump and some said doesn't. From the bytecode, it seems it allows

Re: [iovisor-dev] Rx-tx summaries by subnet

Hi, Linux 4.11 has LPM trie support exactly for this [1]. I'm using regular hashmaps for now with a fixed subnet length step (e.g. for IPv4, I'm looking up /24, /16) for steering purposes. This however might not work in your use case, especially if you're not in control of the block subdivision.