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From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: brouer@redhat.com, alexei.starovoitov@gmail.com, netdev@vger.kernel.org
Subject: Re: [PATCH bpf-next v3 05/11] bpf: avoid retpoline for lookup/update/delete calls on maps
Date: Sun, 3 Jun 2018 08:56:51 +0200	[thread overview]
Message-ID: <20180603085651.73c76704@redhat.com> (raw)
In-Reply-To: <20180602210641.6163-6-daniel@iogearbox.net>

On Sat,  2 Jun 2018 23:06:35 +0200
Daniel Borkmann <daniel@iogearbox.net> wrote:

> Before:
> 
>   # bpftool p d x i 1

Could this please be changed to:

 # bpftool prog dump xlated id 1

I requested this before, but you seem to have missed my feedback...
This makes the command "self-documenting" and searchable by Google.


>     0: (bf) r2 = r10
>     1: (07) r2 += -8
>     2: (7a) *(u64 *)(r2 +0) = 0
>     3: (18) r1 = map[id:1]
>     5: (85) call __htab_map_lookup_elem#232656
>     6: (15) if r0 == 0x0 goto pc+4
>     7: (71) r1 = *(u8 *)(r0 +35)
>     8: (55) if r1 != 0x0 goto pc+1
>     9: (72) *(u8 *)(r0 +35) = 1
>    10: (07) r0 += 56
>    11: (15) if r0 == 0x0 goto pc+4
>    12: (bf) r2 = r0
>    13: (18) r1 = map[id:1]
>    15: (85) call bpf_map_delete_elem#215008  <-- indirect call via
>    16: (95) exit                                 helper
> 



-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer

  reply	other threads:[~2018-06-03  6:56 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-02 21:06 [PATCH bpf-next v3 00/11] Misc BPF improvements Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 01/11] bpf: test case for map pointer poison with calls/branches Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 02/11] bpf: add also cbpf long jump test cases with heavy expansion Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 03/11] bpf: fixup error message from gpl helpers on license mismatch Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 04/11] bpf: show prog and map id in fdinfo Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 05/11] bpf: avoid retpoline for lookup/update/delete calls on maps Daniel Borkmann
2018-06-03  6:56   ` Jesper Dangaard Brouer [this message]
2018-06-03 16:11     ` Daniel Borkmann
2018-06-03 17:08       ` Jesper Dangaard Brouer
2018-06-04 11:02         ` Phil Sutter
2018-06-04 18:25           ` Jakub Kicinski
2018-06-04 19:45             ` Daniel Borkmann
2018-06-04 22:36             ` David Ahern
2018-06-02 21:06 ` [PATCH bpf-next v3 06/11] bpf: add bpf_skb_cgroup_id helper Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 07/11] bpf: make sure to clear unused fields in tunnel/xfrm state fetch Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 08/11] bpf: fix cbpf parser bug for octal numbers Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 09/11] bpf: fix context access in tracing progs on 32 bit archs Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 10/11] bpf: sync bpf uapi header with tools Daniel Borkmann
2018-06-02 21:06 ` [PATCH bpf-next v3 11/11] bpf, doc: add missing patchwork url and libbpf to maintainers Daniel Borkmann
2018-06-03 15:08 ` [PATCH bpf-next v3 00/11] Misc BPF improvements Alexei Starovoitov

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