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libbpf: Add bpf_cookie to perf_event, kprobe, uprobe, and tp attach APIs

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Wire through bpf_cookie for all attach APIs that use perf_event_open under the
hood:
  - for kprobes, extend existing bpf_kprobe_opts with bpf_cookie field;
  - for perf_event, uprobe, and tracepoint APIs, add their _opts variants and
    pass bpf_cookie through opts.

For kernel that don't support BPF_LINK_CREATE for perf_events, and thus
bpf_cookie is not supported either, return error and log warning for user.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210815070609.987780-12-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko
2021-08-15 00:06:04 -07:00
committed by Andrii Nakryiko
parent a3f8c5a306
commit 91259bc676
3 changed files with 127 additions and 25 deletions
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3
src/libbpf.map
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@@ -374,6 +374,9 @@ LIBBPF_0.5.0 {
bpf_map__pin_path;
bpf_map_lookup_and_delete_elem_flags;
bpf_program__attach_kprobe_opts;
bpf_program__attach_perf_event_opts;
bpf_program__attach_tracepoint_opts;
bpf_program__attach_uprobe_opts;
bpf_object__gen_loader;
btf__load_from_kernel_by_id;
btf__load_from_kernel_by_id_split;