[bpf-next,0/2] bpftool: Add command to list BPF types, helpers

Message

Quentin Monnet June 29, 2022, 2:40 p.m. UTC

Now that bpftool relies on libbpf to get a "standard" textual
representation for program, map, link, and attach types, we can make it
list all these types (plus BPF helpers) that it knows from compilation
time.

The first use case for this feature is to help with bash completion. It
also provides a simple way for scripts to iterate over existing BPF types,
using the canonical names known to libbpf.

The first patch adds a new subcommand "bpftool feature list" to do this,
and the second one updates the bash completion to drop the hardcoded lists
of map types or cgroup attach types.

Quentin Monnet (2):
  bpftool: Add feature list (prog/map/link/attach types, helpers)
  bpftool: Use feature list in bash completion

 .../bpftool/Documentation/bpftool-feature.rst | 12 ++++
 tools/bpf/bpftool/bash-completion/bpftool     | 28 ++++------
 tools/bpf/bpftool/feature.c                   | 55 +++++++++++++++++++
 .../selftests/bpf/test_bpftool_synctypes.py   | 20 +------
 4 files changed, 80 insertions(+), 35 deletions(-)