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| author |   Alexei Starovoitov <ast@kernel.org> | 2020-01-20 16:53:47 -0800 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2020-01-22 23:04:53 +0100 |
| commit | 2db6eab18b9778d55f48c804f8efebd7097e7958 (patch) | |
| tree | ad350f22004bb7f7ba18e81277e58bb64d2480f0 /tools/lib/bpf/libbpf.map | |
| parent | bpf: Introduce dynamic program extensions (diff) | |
| download | linux-dev-2db6eab18b9778d55f48c804f8efebd7097e7958.tar.xz linux-dev-2db6eab18b9778d55f48c804f8efebd7097e7958.zip | |
libbpf: Add support for program extensions
Add minimal support for program extensions. bpf_object_open_opts() needs to be
called with attach_prog_fd = target_prog_fd and BPF program extension needs to
have in .c file section definition like SEC("freplace/func_to_be_replaced").
libbpf will search for "func_to_be_replaced" in the target_prog_fd's BTF and
will pass it in attach_btf_id to the kernel. This approach works for tests, but
more compex use case may need to request function name (and attach_btf_id that
kernel sees) to be more dynamic. Such API will be added in future patches.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20200121005348.2769920-3-ast@kernel.org
Diffstat (limited to 'tools/lib/bpf/libbpf.map')
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 64ec71ba41f1..b035122142bb 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -228,7 +228,9 @@ LIBBPF_0.0.7 { bpf_prog_attach_xattr; bpf_program__attach; bpf_program__name; + bpf_program__is_extension; bpf_program__is_struct_ops; + bpf_program__set_extension; bpf_program__set_struct_ops; btf__align_of; libbpf_find_kernel_btf; |