On Fri, Sep 03, 2021 at 12:27:52AM +0200, Toke Høiland-Jørgensen wrote:

quoted

quoted

The question is if it's useful to provide the full struct_ops for
qdiscs? Having it would allow a BPF program to implement that interface
towards userspace (things like statistics, classes etc), but the
question is if anyone is going to bother with that given the wealth of
BPF-specific introspection tools already available?

Instead of bpftool can only introspect bpf qdisc and the existing tc
can only introspect kernel qdisc,  it will be nice to have bpf
qdisc work as other qdisc and showing details together with others
in tc.  e.g. a bpf qdisc export its data/stats with its btf-id
to tc and have tc print it out in a generic way?