[PATCH bpf-next 0/4] bpf: Generate helpers for pinning through bpf object skeleton

[Yafang Shao <laoar.shao@gmail.com>]

Currently there're helpers for allowing to open/load/attach BPF object
through BPF object skeleton. Let's also add helpers for pinning through
BPF object skeleton. It could simplify BPF userspace code which wants to
pin the progs into bpffs.

After this change, with command 'bpftool gen skeleton XXX.bpf.o', the
helpers for pinning BPF prog will be generated in BPF object skeleton.

The new helpers are named with __{pin, unpin}_prog, because it only pins
bpf progs. If the user also wants to pin bpf maps, he can use
LIBBPF_PIN_BY_NAME.

Yafang Shao (4):
  libbpf: Define DEFAULT_BPFFS
  libbpf: Add helpers for pinning bpf prog through bpf object skeleton
  bpftool: Fix incorrect return in generated detach helper
  bpftool: Generate helpers for pinning prog through bpf object skeleton

 tools/bpf/bpftool/gen.c     | 18 ++++++++++-
 tools/lib/bpf/bpf_helpers.h |  2 +-
 tools/lib/bpf/libbpf.c      | 61 ++++++++++++++++++++++++++++++++++++-
 tools/lib/bpf/libbpf.h      | 10 ++++--
 tools/lib/bpf/libbpf.map    |  2 ++
 5 files changed, 88 insertions(+), 5 deletions(-)

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2.17.1