> > This is a real use case as part of a larger design I am working on. > > However, given that redirect from TC egress to XDP_DRV_MODE ingress > > fundamentally doesn't work, I am rethinking other options to the > > design. Alternatively, it seems that support for XDP_REDIRECT from > > egress to ingress is currently in the works, although I don't believe > > the patch has yet been applied to the mainstream kernel. > > Huh, really? Haven't seen that, got a link? This is where I saw the discussion for adding XDP support in the egress path https://lwn.net/Articles/818591/, which if I am understanding correctly is also proposing to add the XDP_REDIRECT support on egress. (Also, for completeness sake, this is the man page for bpf_redirect() that says currently XDP only supports redirection from ingress to egress, and does not have egress to ingress redirection. https://man7.org/linux/man-pages/man7/bpf-helpers.7.html) Do you have any insight into whether/when this XDP_REDIRECT functionality on egress will be added to the kernel? > > > So I will also try building the kernel myself with the patch and > > hopefully get the egress to ingress redirect working with 2 XDP > > programs attached in driver mode. Thank you very much for all your > > help! > > You're welcome :) > > -Toke >
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