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From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Stanislav Fomichev <sdf@google.com>
Cc: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
	andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
	yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org,
	haoluo@google.com, jolsa@kernel.org,
	Jakub Kicinski <kuba@kernel.org>,
	Willem de Bruijn <willemb@google.com>,
	Jesper Dangaard Brouer <brouer@redhat.com>,
	Anatoly Burakov <anatoly.burakov@intel.com>,
	Alexander Lobakin <alexandr.lobakin@intel.com>,
	Magnus Karlsson <magnus.karlsson@gmail.com>,
	Maryam Tahhan <mtahhan@redhat.com>,
	xdp-hints@xdp-project.net, netdev@vger.kernel.org
Subject: [xdp-hints] Re: [RFC bpf-next 3/5] libbpf: Pass prog_ifindex via bpf_object_open_opts
Date: Thu, 27 Oct 2022 13:05:36 -0700	[thread overview]
Message-ID: <CAEf4BzbgjOaxVFAfnrRyPP0_1Rh-gC3er4tKLkfr=OPb_x-ueA@mail.gmail.com> (raw)
In-Reply-To: <20221027200019.4106375-4-sdf@google.com>

On Thu, Oct 27, 2022 at 1:00 PM Stanislav Fomichev <sdf@google.com> wrote:
>
> Allow passing prog_ifindex to BPF_PROG_LOAD. This patch is
> not XDP metadata specific but it's here because we (ab)use
> prog_ifindex as "target metadata" device during loading.
> We can figure out proper UAPI story if we decide to go forward
> with the kfunc approach.
>
> Cc: Martin KaFai Lau <martin.lau@linux.dev>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Willem de Bruijn <willemb@google.com>
> Cc: Jesper Dangaard Brouer <brouer@redhat.com>
> Cc: Anatoly Burakov <anatoly.burakov@intel.com>
> Cc: Alexander Lobakin <alexandr.lobakin@intel.com>
> Cc: Magnus Karlsson <magnus.karlsson@gmail.com>
> Cc: Maryam Tahhan <mtahhan@redhat.com>
> Cc: xdp-hints@xdp-project.net
> Cc: netdev@vger.kernel.org
> Signed-off-by: Stanislav Fomichev <sdf@google.com>
> ---
>  tools/lib/bpf/libbpf.c | 1 +
>  tools/lib/bpf/libbpf.h | 6 +++++-
>  2 files changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 5d7819edf074..61bc37006fe4 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -7190,6 +7190,7 @@ static int bpf_object_init_progs(struct bpf_object *obj, const struct bpf_object
>
>                 prog->type = prog->sec_def->prog_type;
>                 prog->expected_attach_type = prog->sec_def->expected_attach_type;
> +               prog->prog_ifindex = opts->prog_ifindex;
>
>                 /* sec_def can have custom callback which should be called
>                  * after bpf_program is initialized to adjust its properties
> diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
> index eee883f007f9..4a40b7623099 100644
> --- a/tools/lib/bpf/libbpf.h
> +++ b/tools/lib/bpf/libbpf.h
> @@ -170,9 +170,13 @@ struct bpf_object_open_opts {
>          */
>         __u32 kernel_log_level;
>
> +       /* Optional ifindex of netdev for offload purposes.
> +        */
> +       int prog_ifindex;
> +

nope, don't do that, open_opts are for entire object, while this is
per-program thing

So bpf_program__set_ifindex() setter would be more appropriate


>         size_t :0;
>  };
> -#define bpf_object_open_opts__last_field kernel_log_level
> +#define bpf_object_open_opts__last_field prog_ifindex
>
>  LIBBPF_API struct bpf_object *bpf_object__open(const char *path);
>
> --
> 2.38.1.273.g43a17bfeac-goog
>

  reply	other threads:[~2022-10-27 20:05 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-27 20:00 [xdp-hints] [RFC bpf-next 0/5] xdp: hints via kfuncs Stanislav Fomichev
2022-10-27 20:00 ` [xdp-hints] [RFC bpf-next 1/5] bpf: Support inlined/unrolled kfuncs for xdp metadata Stanislav Fomichev
2022-10-27 20:00 ` [xdp-hints] [RFC bpf-next 2/5] veth: Support rx timestamp metadata for xdp Stanislav Fomichev
2022-10-28  8:40   ` [xdp-hints] " Jesper Dangaard Brouer
2022-10-28 18:46     ` Stanislav Fomichev
2022-10-27 20:00 ` [xdp-hints] [RFC bpf-next 3/5] libbpf: Pass prog_ifindex via bpf_object_open_opts Stanislav Fomichev
2022-10-27 20:05   ` Andrii Nakryiko [this message]
2022-10-27 20:10     ` [xdp-hints] " Stanislav Fomichev
2022-10-27 20:00 ` [xdp-hints] [RFC bpf-next 4/5] selftests/bpf: Convert xskxceiver to use custom program Stanislav Fomichev
2022-10-27 20:00 ` [xdp-hints] [RFC bpf-next 5/5] selftests/bpf: Test rx_timestamp metadata in xskxceiver Stanislav Fomichev
2022-10-28  6:22   ` [xdp-hints] " Martin KaFai Lau
2022-10-28 10:37     ` Jesper Dangaard Brouer
2022-10-28 18:46       ` Stanislav Fomichev
2022-10-31 14:20         ` Alexander Lobakin
2022-10-31 14:29           ` Alexander Lobakin
2022-10-31 17:00           ` Stanislav Fomichev
2022-11-01 13:18             ` Jesper Dangaard Brouer
2022-11-01 20:12               ` Stanislav Fomichev
2022-11-01 22:23               ` Toke Høiland-Jørgensen
2022-10-28 15:58 ` [xdp-hints] Re: [RFC bpf-next 0/5] xdp: hints via kfuncs John Fastabend
2022-10-28 18:04   ` Jakub Kicinski
2022-10-28 18:46     ` Stanislav Fomichev
2022-10-28 23:16       ` John Fastabend
2022-10-29  1:14         ` Jakub Kicinski
2022-10-31 14:10           ` Bezdeka, Florian
2022-10-31 15:28             ` Toke Høiland-Jørgensen
2022-10-31 17:00               ` Stanislav Fomichev
2022-10-31 22:57                 ` Martin KaFai Lau
2022-11-01  1:59                   ` Stanislav Fomichev
2022-11-01 12:52                     ` Toke Høiland-Jørgensen
2022-11-01 13:43                       ` David Ahern
2022-11-01 14:20                         ` Toke Høiland-Jørgensen
2022-11-01 17:05                     ` Martin KaFai Lau
2022-11-01 20:12                       ` Stanislav Fomichev
2022-11-02 14:06                       ` Jesper Dangaard Brouer
2022-11-02 22:01                         ` Toke Høiland-Jørgensen
2022-11-02 23:10                           ` Stanislav Fomichev
2022-11-03  0:09                             ` Toke Høiland-Jørgensen
2022-11-03 12:01                               ` Jesper Dangaard Brouer
2022-11-03 12:48                                 ` Toke Høiland-Jørgensen
2022-11-03 15:25                                   ` Jesper Dangaard Brouer
2022-10-31 19:36               ` Yonghong Song
2022-10-31 22:09                 ` Stanislav Fomichev
2022-10-31 22:38                   ` Yonghong Song
2022-10-31 22:55                     ` Stanislav Fomichev
2022-11-01 14:23                       ` Jesper Dangaard Brouer
2022-11-01 17:31                   ` Martin KaFai Lau
2022-11-01 20:12                     ` Stanislav Fomichev
2022-11-01 21:17                       ` Martin KaFai Lau
2022-10-31 17:01           ` John Fastabend

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