netdev - Re: [PATCH bpf-next 0/3] capture integers in BTF type info for map defs

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Date:   Thu, 27 Jun 2019 17:22:18 +0000
From:   Song Liu <songliubraving@...com>
To:     Andrii Nakryiko <andriin@...com>
CC:     Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Alexei Starovoitov <ast@...com>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        Kernel Team <Kernel-team@...com>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH bpf-next 0/3] capture integers in BTF type info for map
 defs



> On Jun 26, 2019, at 4:21 PM, Andrii Nakryiko <andriin@...com> wrote:
> 
> This patch set implements an update to how BTF-defined maps are specified. The
> change is in how integer attributes, e.g., type, max_entries, map_flags, are
> specified: now they are captured as part of map definition struct's BTF type
> information (using array dimension), eliminating the need for compile-time
> data initialization and keeping all the metadata in one place.

Using array dimension is hacky. But I guess this work.



> 
> All existing selftests that were using BTF-defined maps are updated, along
> with some other selftests, that were switched to new syntax.
> 
> Andrii Nakryiko (3):
>  libbpf: capture value in BTF type info for BTF-defined map defs
>  selftests/bpf: convert selftests using BTF-defined maps to new syntax
>  selftests/bpf: convert legacy BPF maps to BTF-defined ones
> 
> tools/lib/bpf/libbpf.c                        |  58 +++++----
> tools/testing/selftests/bpf/bpf_helpers.h     |   3 +
> tools/testing/selftests/bpf/progs/bpf_flow.c  |  28 ++---
> .../selftests/bpf/progs/get_cgroup_id_kern.c  |  26 ++---
> .../testing/selftests/bpf/progs/netcnt_prog.c |  20 ++--
> tools/testing/selftests/bpf/progs/pyperf.h    |  90 +++++++-------
> .../selftests/bpf/progs/sample_map_ret0.c     |  24 ++--
> .../selftests/bpf/progs/socket_cookie_prog.c  |  13 +--
> .../bpf/progs/sockmap_verdict_prog.c          |  48 ++++----
> .../testing/selftests/bpf/progs/strobemeta.h  |  68 +++++------
> .../selftests/bpf/progs/test_btf_newkv.c      |  13 +--
> .../bpf/progs/test_get_stack_rawtp.c          |  39 +++----
> .../selftests/bpf/progs/test_global_data.c    |  37 +++---
> tools/testing/selftests/bpf/progs/test_l4lb.c |  65 ++++-------
> .../selftests/bpf/progs/test_l4lb_noinline.c  |  65 ++++-------
> .../selftests/bpf/progs/test_map_in_map.c     |  30 ++---
> .../selftests/bpf/progs/test_map_lock.c       |  26 ++---
> .../testing/selftests/bpf/progs/test_obj_id.c |  12 +-
> .../bpf/progs/test_select_reuseport_kern.c    |  67 ++++-------
> .../bpf/progs/test_send_signal_kern.c         |  26 ++---
> .../bpf/progs/test_sock_fields_kern.c         |  78 +++++--------
> .../selftests/bpf/progs/test_spin_lock.c      |  36 +++---
> .../bpf/progs/test_stacktrace_build_id.c      |  55 ++++-----
> .../selftests/bpf/progs/test_stacktrace_map.c |  52 +++------
> .../selftests/bpf/progs/test_tcp_estats.c     |  13 +--
> .../selftests/bpf/progs/test_tcpbpf_kern.c    |  26 ++---
> .../selftests/bpf/progs/test_tcpnotify_kern.c |  28 ++---
> tools/testing/selftests/bpf/progs/test_xdp.c  |  26 ++---
> .../selftests/bpf/progs/test_xdp_loop.c       |  26 ++---
> .../selftests/bpf/progs/test_xdp_noinline.c   |  81 +++++--------
> .../selftests/bpf/progs/xdp_redirect_map.c    |  12 +-
> .../testing/selftests/bpf/progs/xdping_kern.c |  12 +-
> .../selftests/bpf/test_queue_stack_map.h      |  30 ++---
> .../testing/selftests/bpf/test_sockmap_kern.h | 110 +++++++++---------
> 34 files changed, 571 insertions(+), 772 deletions(-)
> 
> -- 
> 2.17.1
>