linux-kernel - Re: [PATCH perf/core 0/6] Libbpf improvements

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Date:   Thu, 19 Jan 2017 18:24:02 +0800
From:   "Wangnan (F)" <wangnan0@...wei.com>
To:     Joe Stringer <joe@....org>, <linux-kernel@...r.kernel.org>
CC:     <ast@...com>, <daniel@...earbox.net>, <acme@...nel.org>
Subject: Re: [PATCH perf/core 0/6] Libbpf improvements



On 2017/1/19 7:57, Joe Stringer wrote:
> Patch 1 fixes an issue when using drastically different BPF map definitions
> inside ELFs from a client using libbpf, vs the map definition libbpf uses.
>
> Patch 2 is a trivial typo fix.
>
> Patches 3-5 add some simple, useful helper functions for setting prog type
> and retrieving libbpf errors without depending on kernel headers from
> userspace programs.
>
> Patch 6 adds a new pinning functionality for an entire object. Calling
> bpf_object__pin(obj, subpath) will mount all programs from the BPF object
> to $bpf_fs_path/$subpath/progs/$progname, and all maps from the BPF object
> to $bpf_fs_path/$subpath/maps/$mapname. The first program with a particular
> name will be mounted with its progname and the suffix "_0"; subsequent
> programs with the same will have "_1", and so on; duplicate maps with the
> same name are disallowed.
>
> Joe Stringer (6):
>    tools lib bpf: Fix map offsets in relocation
>    tools lib bpf: Fix grammar in map_idx warning
>    tools lib bpf: Define prog_type fns with macro
>    tools lib bpf: Add set/is helpers for all prog types
>    tools lib bpf: Add libbpf_get_error()
>    tools lib bpf: Add bpf_object__pin()
>
>   tools/lib/bpf/libbpf.c  | 197 +++++++++++++++++++++++++++++++++++++++++-------
>   tools/lib/bpf/libbpf.h  |  15 +++-
>   tools/perf/tests/llvm.c |   2 +-
>   3 files changed, 185 insertions(+), 29 deletions(-)
>
For patch 3,4 and 5:

Acked-by: Wang Nan <wangnan0@...wei.com>

See my comment to commits 1, 2 and 6.

Thank you.