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libbpf: Add support for attaching BPF programs to other BPF programs

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Extend libbpf api to pass attach_prog_fd into bpf_object__open.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20191114185720.1641606-19-ast@kernel.org
This commit is contained in:
Alexei Starovoitov
2019-11-14 10:57:18 -08:00
committed by Daniel Borkmann
parent 5b92a28aae
commit e7bf94dbb8
5 changed files with 71 additions and 17 deletions
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5
tools/lib/bpf/bpf.h
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@ -77,7 +77,10 @@ struct bpf_load_program_attr {
const struct bpf_insn *insns;
size_t insns_cnt;
const char *license;
__u32 kern_version;
union {
__u32 kern_version;
__u32 attach_prog_fd;
};
union {
__u32 prog_ifindex;
__u32 attach_btf_id;