It is possible to call a cpumask kfunc within a raw tp_btf program but not possible within tracepoint, kprobe, or perf event programs. Currently, the verifier receives -EACCESS from fetch_kfunc_meta() as a result of not finding any kfunc hook associated with these program types. This patch series adds new kfunc hooks and maps them to program types where needed. The additional registration of the three program types mentioned is done for the cpumask kfuncs allowing them to be called within these types of programs. Pre-submission CI run: https://github.com/kernel-patches/bpf/pull/7600 v2: - create new kfunc hooks for tracepoint and perf event - map tracepoint, and perf event prog types to kfunc hooks - register cpumask kfuncs with prog types in focus - expand existing verifier tests for cpumask kfuncs v1: - map tracepoint type progs to tracing kfunc hook - new selftests for calling cpumask kfuncs in tracepoint prog --- JP Kobryn (3): bpf: new btf kfunc hooks for tracepoint and perf event bpf: register additional prog types with cpumask kfuncs bpf/selftests: coverage for new program types using cpumask kfuncs kernel/bpf/btf.c | 6 +++++ kernel/bpf/cpumask.c | 3 +++ .../bpf/progs/verifier_kfunc_prog_types.c | 24 +++++++++++++++++++ 3 files changed, 33 insertions(+) -- 2.46.0
