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

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Date:   Wed, 18 Jan 2017 15:57:18 -0800
From:   Joe Stringer <joe@....org>
To:     linux-kernel@...r.kernel.org
Cc:     wangnan0@...wei.com, ast@...com, daniel@...earbox.net,
        acme@...nel.org
Subject: [PATCH perf/core 0/6] Libbpf improvements

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(-)

-- 
2.11.0