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libbpf: Add probe for large INSN limit

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Introduce a new probe which checks whether kernel has large maximum
program size which was increased in the following commit:

c04c0d2b968a ("bpf: increase complexity limit and maximum program size")

Based on the similar check in Cilium[0], authored by Daniel Borkmann.

  [0] 657d0f585a

Co-authored-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Michal Rostecki <mrostecki@opensuse.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Link: https://lore.kernel.org/bpf/20200108162428.25014-2-mrostecki@opensuse.org
This commit is contained in:
Michal Rostecki
2020-01-08 17:23:52 +01:00
committed by Andrii Nakryiko
parent 5033d7177e
commit b95b281039
3 changed files with 23 additions and 0 deletions
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src/libbpf.map
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@@ -219,6 +219,7 @@ LIBBPF_0.0.7 {
bpf_object__detach_skeleton;
bpf_object__load_skeleton;
bpf_object__open_skeleton;
bpf_probe_large_insn_limit;
bpf_prog_attach_xattr;
bpf_program__attach;
bpf_program__name;