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| author | Yonghong Song <yhs@fb.com> | 2020-05-09 20:59:17 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-05-10 03:05:27 +0300 |
| commit | c09add2fbc5aece00a5b54a48ce39fd4e3284d87 (patch) | |
| tree | 221ce4b3c6ae0308ad18857624954760580abdf5 /tools/lib/bpf/libbpf.h | |
| parent | 9c5f8a1008a121e4c6b24af211034e24b0b63081 (diff) | |
| download | linux-c09add2fbc5aece00a5b54a48ce39fd4e3284d87.tar.xz | |
tools/libbpf: Add bpf_iter support
Two new libbpf APIs are added to support bpf_iter:
- bpf_program__attach_iter
Given a bpf program and additional parameters, which is
none now, returns a bpf_link.
- bpf_iter_create
syscall level API to create a bpf iterator.
The macro BPF_SEQ_PRINTF are also introduced. The format
looks like:
BPF_SEQ_PRINTF(seq, "task id %d\n", pid);
This macro can help bpf program writers with
nicer bpf_seq_printf syntax similar to the kernel one.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200509175917.2476936-1-yhs@fb.com
Diffstat (limited to 'tools/lib/bpf/libbpf.h')
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index f1dacecb1619..8ea69558f0a8 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -258,6 +258,15 @@ struct bpf_map; LIBBPF_API struct bpf_link *bpf_map__attach_struct_ops(struct bpf_map *map); +struct bpf_iter_attach_opts { + size_t sz; /* size of this struct for forward/backward compatibility */ +}; +#define bpf_iter_attach_opts__last_field sz + +LIBBPF_API struct bpf_link * +bpf_program__attach_iter(struct bpf_program *prog, + const struct bpf_iter_attach_opts *opts); + struct bpf_insn; /* |