| Message ID | 20201212024810.807616-3-songliubraving@fb.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | introduce bpf_iter for task_vma | expand |
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 52ddd217d6a19..839c654160d1b 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -1191,6 +1191,11 @@ BTF_SET_END(btf_allowlist_d_path) static bool bpf_d_path_allowed(const struct bpf_prog *prog) { + if (prog->type == BPF_PROG_TYPE_TRACING && + prog->expected_attach_type == BPF_TRACE_ITER && + prog->aux->sleepable) + return true; + if (prog->type == BPF_PROG_TYPE_LSM) return bpf_lsm_is_sleepable_hook(prog->aux->attach_btf_id);
task_file and task_vma iter programs have access to file->f_path. Enable bpf_d_path to print paths of these file. bpf_iter programs are generally called in sleepable context. However, it is still necessary to diffientiate sleepable and non-sleepable bpf_iter programs: sleepable programs have access to bpf_d_path; non-sleepable programs have access to bpf_spin_lock. Signed-off-by: Song Liu <songliubraving@fb.com> --- kernel/trace/bpf_trace.c | 5 +++++ 1 file changed, 5 insertions(+)