From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Cc: "Alexei Starovoitov" <alexei.starovoitov@gmail.com>,
bpf <bpf@vger.kernel.org>,
"Toke Høiland-Jørgensen" <toke@redhat.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Jamal Hadi Salim" <jhs@mojatatu.com>,
"Vlad Buslov" <vladbu@nvidia.com>,
"Cong Wang" <xiyou.wangcong@gmail.com>,
"Jesper Dangaard Brouer" <brouer@redhat.com>,
Networking <netdev@vger.kernel.org>
Subject: Re: [PATCH bpf-next v2 6/7] libbpf: add bpf_link based TC-BPF management API
Date: Mon, 7 Jun 2021 16:37:04 -0700 [thread overview]
Message-ID: <CAEf4BzZ3Kt0iw1mOjuLL2m0gnrrj0u7znSuacJm3rjv=zZ27eQ@mail.gmail.com> (raw)
In-Reply-To: <20210605045138.7kbnag6e4zjithjm@apollo>
On Fri, Jun 4, 2021 at 9:52 PM Kumar Kartikeya Dwivedi <memxor@gmail.com> wrote:
>
> On Fri, Jun 04, 2021 at 11:31:57PM IST, Alexei Starovoitov wrote:
> > On Fri, Jun 04, 2021 at 12:01:15PM +0530, Kumar Kartikeya Dwivedi wrote:
> > > +/* TC bpf_link related API */
> > > +struct bpf_tc_hook;
> > > +
> > > +struct bpf_tc_link_opts {
> > > + size_t sz;
> > > + __u32 handle;
> > > + __u32 priority;
> > > + __u32 gen_flags;
> > > + size_t :0;
> > > +};
> >
> > Did you think of a way to share struct bpf_tc_opts with above?
> > Or use bpf_tc_link_opts inside bpf_tc_opts?
>
> A couple of fields in bpf_tc_opts aren't really relevant here (prog_fd, prog_id)
> and will always be unused, so I thought it would be cleaner to give this its own
> opts struct. It still reuses the hook abstraction that was added, though.
Overall probably it will be less confusing to have one _opts struct
across both APIs, even if some of the fields are not used. Just
enforce that they are always NULL (and document in a comment that for
bpf_link-based API it's not expected).
>
> > Some other way?
> > gen_flags here and flags there are the same?
>
> No, it was an oversight that I missed adding gen_flags there, I'll send a patch
> separately with some other assorted things. It's used when offloading to HW.
>
> We don't really support any other flags (e.g. BPF_TC_F_REPLACE) for this.
>
> --
> Kartikeya
next prev parent reply other threads:[~2021-06-07 23:37 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-04 6:31 [PATCH bpf-next v2 0/7] Add bpf_link based TC-BPF API Kumar Kartikeya Dwivedi
2021-06-04 6:31 ` [PATCH bpf-next v2 1/7] net: sched: refactor cls_bpf creation code Kumar Kartikeya Dwivedi
2021-06-04 6:31 ` [PATCH bpf-next v2 2/7] bpf: export bpf_link functions for modules Kumar Kartikeya Dwivedi
2021-06-04 6:31 ` [PATCH bpf-next v2 3/7] net: sched: add bpf_link API for bpf classifier Kumar Kartikeya Dwivedi
2021-06-05 3:08 ` Yonghong Song
2021-06-05 4:52 ` Kumar Kartikeya Dwivedi
2021-06-07 23:23 ` Andrii Nakryiko
2021-06-04 6:31 ` [PATCH bpf-next v2 4/7] net: sched: add lightweight update path for cls_bpf Kumar Kartikeya Dwivedi
2021-06-04 17:54 ` Alexei Starovoitov
2021-06-05 4:42 ` Kumar Kartikeya Dwivedi
2021-06-07 23:32 ` Andrii Nakryiko
2021-06-10 14:14 ` Kumar Kartikeya Dwivedi
2021-06-04 6:31 ` [PATCH bpf-next v2 5/7] tools: bpf.h: sync with kernel sources Kumar Kartikeya Dwivedi
2021-06-04 6:31 ` [PATCH bpf-next v2 6/7] libbpf: add bpf_link based TC-BPF management API Kumar Kartikeya Dwivedi
2021-06-04 18:01 ` Alexei Starovoitov
2021-06-05 4:51 ` Kumar Kartikeya Dwivedi
2021-06-07 23:37 ` Andrii Nakryiko [this message]
2021-06-05 17:09 ` Yonghong Song
2021-06-07 23:41 ` Andrii Nakryiko
2021-06-04 6:31 ` [PATCH bpf-next v2 7/7] libbpf: add selftest for " Kumar Kartikeya Dwivedi
2021-06-05 17:26 ` Yonghong Song
2021-06-07 23:57 ` Andrii Nakryiko
2022-06-10 0:24 ` [PATCH bpf-next v2 0/7] Add bpf_link based TC-BPF API Joanne Koong
2022-06-10 12:58 ` Kumar Kartikeya Dwivedi
2022-06-10 17:23 ` Joanne Koong
2022-06-10 19:07 ` Joanne Koong
2022-06-10 19:34 ` Kumar Kartikeya Dwivedi
2022-06-10 20:04 ` Daniel Borkmann
2022-06-10 22:01 ` Joanne Koong
2022-06-10 20:16 ` Toke Høiland-Jørgensen
2022-06-10 20:35 ` Daniel Borkmann
2022-06-10 20:41 ` Toke Høiland-Jørgensen
2022-06-10 21:52 ` Alexei Starovoitov
2022-06-10 22:02 ` Daniel Borkmann
2022-06-11 10:54 ` Toke Høiland-Jørgensen
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