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From: Song Liu <liu.song.a23@gmail.com>
To: Stanislav Fomichev <sdf@google.com>
Cc: Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
	"David S . Miller" <davem@davemloft.net>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Willem de Bruijn <willemb@google.com>,
	Petar Penkov <ppenkov@google.com>
Subject: Re: [PATCH bpf-next 1/7] bpf/flow_dissector: pass input flags to BPF flow dissector program
Date: Wed, 24 Jul 2019 15:21:47 -0700	[thread overview]
Message-ID: <CAPhsuW6wq_6Pf80yV7oEb0uW7Xv9=UKAbTm4XJLyKAtSmDzCBQ@mail.gmail.com> (raw)
In-Reply-To: <20190724170018.96659-2-sdf@google.com>

On Wed, Jul 24, 2019 at 10:11 AM Stanislav Fomichev <sdf@google.com> wrote:
>
> C flow dissector supports input flags that tell it to customize parsing
> by either stopping early or trying to parse as deep as possible. Pass
> those flags to the BPF flow dissector so it can make the same
> decisions. In the next commits I'll add support for those flags to
> our reference bpf_flow.c
>
> Cc: Willem de Bruijn <willemb@google.com>
> Cc: Petar Penkov <ppenkov@google.com>
> Signed-off-by: Stanislav Fomichev <sdf@google.com>
> ---
>  include/linux/skbuff.h       | 2 +-
>  include/net/flow_dissector.h | 4 ----
>  include/uapi/linux/bpf.h     | 5 +++++
>  net/bpf/test_run.c           | 2 +-
>  net/core/flow_dissector.c    | 5 +++--
>  5 files changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
> index 718742b1c505..9b7a8038beec 100644
> --- a/include/linux/skbuff.h
> +++ b/include/linux/skbuff.h
> @@ -1271,7 +1271,7 @@ static inline int skb_flow_dissector_bpf_prog_detach(const union bpf_attr *attr)
>
>  struct bpf_flow_dissector;
>  bool bpf_flow_dissect(struct bpf_prog *prog, struct bpf_flow_dissector *ctx,
> -                     __be16 proto, int nhoff, int hlen);
> +                     __be16 proto, int nhoff, int hlen, unsigned int flags);
>
>  bool __skb_flow_dissect(const struct net *net,
>                         const struct sk_buff *skb,
> diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
> index 90bd210be060..3e2642587b76 100644
> --- a/include/net/flow_dissector.h
> +++ b/include/net/flow_dissector.h
> @@ -253,10 +253,6 @@ enum flow_dissector_key_id {
>         FLOW_DISSECTOR_KEY_MAX,
>  };
>
> -#define FLOW_DISSECTOR_F_PARSE_1ST_FRAG                BIT(0)
> -#define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL    BIT(1)
> -#define FLOW_DISSECTOR_F_STOP_AT_ENCAP         BIT(2)
> -
>  struct flow_dissector_key {
>         enum flow_dissector_key_id key_id;
>         size_t offset; /* offset of struct flow_dissector_key_*
> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> index fa1c753dcdbc..b4ad19bd6aa8 100644
> --- a/include/uapi/linux/bpf.h
> +++ b/include/uapi/linux/bpf.h
> @@ -3507,6 +3507,10 @@ enum bpf_task_fd_type {
>         BPF_FD_TYPE_URETPROBE,          /* filename + offset */
>  };
>
> +#define FLOW_DISSECTOR_F_PARSE_1ST_FRAG                (1U << 0)
> +#define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL    (1U << 1)
> +#define FLOW_DISSECTOR_F_STOP_AT_ENCAP         (1U << 2)

Do we have to move these?

Thanks,
Song

  reply	other threads:[~2019-07-24 22:22 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-24 17:00 [PATCH bpf-next 0/7] bpf/flow_dissector: support input flags Stanislav Fomichev
2019-07-24 17:00 ` [PATCH bpf-next 1/7] bpf/flow_dissector: pass input flags to BPF flow dissector program Stanislav Fomichev
2019-07-24 22:21   ` Song Liu [this message]
2019-07-24 22:32     ` Stanislav Fomichev
2019-07-24 22:45       ` Song Liu
2019-07-24 17:00 ` [PATCH bpf-next 2/7] bpf/flow_dissector: document flags Stanislav Fomichev
2019-07-24 22:24   ` Song Liu
2019-07-24 17:00 ` [PATCH bpf-next 3/7] bpf/flow_dissector: support flags in BPF_PROG_TEST_RUN Stanislav Fomichev
2019-07-24 22:33   ` Song Liu
2019-07-24 17:00 ` [PATCH bpf-next 4/7] tools/bpf: sync bpf_flow_keys flags Stanislav Fomichev
2019-07-24 23:17   ` Song Liu
2019-07-24 17:00 ` [PATCH bpf-next 5/7] sefltests/bpf: support FLOW_DISSECTOR_F_PARSE_1ST_FRAG Stanislav Fomichev
2019-07-24 23:21   ` Song Liu
2019-07-24 23:52     ` Stanislav Fomichev
2019-07-25  5:36       ` Song Liu
2019-07-24 17:00 ` [PATCH bpf-next 6/7] bpf/flow_dissector: support ipv6 flow_label and FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL Stanislav Fomichev
2019-07-24 23:28   ` Song Liu
2019-07-24 17:00 ` [PATCH bpf-next 7/7] selftests/bpf: support FLOW_DISSECTOR_F_STOP_AT_ENCAP Stanislav Fomichev
2019-07-24 23:29   ` Song Liu
2019-07-24 22:10 ` [PATCH bpf-next 0/7] bpf/flow_dissector: support input flags Willem de Bruijn

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