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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_probes.c | |
| 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 '')
| -rw-r--r-- | tools/lib/bpf/libbpf_probes.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c index 8cc992bc532a..b782ebef6ac9 100644 --- a/tools/lib/bpf/libbpf_probes.c +++ b/tools/lib/bpf/libbpf_probes.c @@ -107,6 +107,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns, case BPF_PROG_TYPE_CGROUP_SOCKOPT: case BPF_PROG_TYPE_TRACING: case BPF_PROG_TYPE_STRUCT_OPS: + case BPF_PROG_TYPE_EXT: default: break; } |