Wire up ability to attach bpf_link-based fentry/fexit/fmod_ret, tp_btf
(BTF-aware raw tracepoints), and LSM programs through universal LINK_CREATE
command, in addition to current BPF_RAW_TRACEPOINT_OPEN.
Teach libbpf to handle this LINK_CREATE/BPF_RAW_TRACEPOINT_OPEN split on older
kernels transparently in universal low-level bpf_link_create() API for users
convenience.
Patch #3 converts fexit_stress selftest to bpf_link_create().
libbpf CI will be testing this fallback logic on older kernels.
Cc: Kui-Feng Lee <kuifeng@xxxxxx>
Andrii Nakryiko (3):
bpf: allow attach TRACING programs through LINK_CREATE command
libbpf: teach bpf_link_create() to fallback to
bpf_raw_tracepoint_open()
selftests/bpf: switch fexit_stress to bpf_link_create() API
kernel/bpf/syscall.c | 110 +++++++++---------
tools/lib/bpf/bpf.c | 34 +++++-
tools/lib/bpf/libbpf.c | 3 +-
.../selftests/bpf/prog_tests/fexit_stress.c | 2 +-
4 files changed, 91 insertions(+), 58 deletions(-)
--
2.30.2
