netdev - [PATCH bpf-next 14/17] libbpf: Add support for SK

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Message-Id: <20200506125514.1020829-15-jakub@cloudflare.com>
Date:   Wed,  6 May 2020 14:55:10 +0200
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     netdev@...r.kernel.org, bpf@...r.kernel.org
Cc:     dccp@...r.kernel.org, kernel-team@...udflare.com,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Gerrit Renker <gerrit@....abdn.ac.uk>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH bpf-next 14/17] libbpf: Add support for SK_LOOKUP program type

Make libbpf aware of the newly added program type, and assign it a
section name.

Signed-off-by: Jakub Sitnicki <jakub@...udflare.com>
---
 tools/lib/bpf/libbpf.c        | 3 +++
 tools/lib/bpf/libbpf.h        | 2 ++
 tools/lib/bpf/libbpf.map      | 2 ++
 tools/lib/bpf/libbpf_probes.c | 1 +
 4 files changed, 8 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 977add1b73e2..74f4a15dc19e 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -6524,6 +6524,7 @@ BPF_PROG_TYPE_FNS(perf_event, BPF_PROG_TYPE_PERF_EVENT);
 BPF_PROG_TYPE_FNS(tracing, BPF_PROG_TYPE_TRACING);
 BPF_PROG_TYPE_FNS(struct_ops, BPF_PROG_TYPE_STRUCT_OPS);
 BPF_PROG_TYPE_FNS(extension, BPF_PROG_TYPE_EXT);
+BPF_PROG_TYPE_FNS(sk_lookup, BPF_PROG_TYPE_SK_LOOKUP);
 
 enum bpf_attach_type
 bpf_program__get_expected_attach_type(struct bpf_program *prog)
@@ -6684,6 +6685,8 @@ static const struct bpf_sec_def section_defs[] = {
 	BPF_EAPROG_SEC("cgroup/setsockopt",	BPF_PROG_TYPE_CGROUP_SOCKOPT,
 						BPF_CGROUP_SETSOCKOPT),
 	BPF_PROG_SEC("struct_ops",		BPF_PROG_TYPE_STRUCT_OPS),
+	BPF_EAPROG_SEC("sk_lookup",		BPF_PROG_TYPE_SK_LOOKUP,
+						BPF_SK_LOOKUP),
 };
 
 #undef BPF_PROG_SEC_IMPL
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index f1dacecb1619..8373fbacbba3 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -337,6 +337,7 @@ LIBBPF_API int bpf_program__set_perf_event(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_tracing(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_struct_ops(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_extension(struct bpf_program *prog);
+LIBBPF_API int bpf_program__set_sk_lookup(struct bpf_program *prog);
 
 LIBBPF_API enum bpf_prog_type bpf_program__get_type(struct bpf_program *prog);
 LIBBPF_API void bpf_program__set_type(struct bpf_program *prog,
@@ -364,6 +365,7 @@ LIBBPF_API bool bpf_program__is_perf_event(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_tracing(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_struct_ops(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_extension(const struct bpf_program *prog);
+LIBBPF_API bool bpf_program__is_sk_lookup(const struct bpf_program *prog);
 
 /*
  * No need for __attribute__((packed)), all members of 'bpf_map_def'
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index e03bd4db827e..113ac0a669c2 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -253,6 +253,8 @@ LIBBPF_0.0.8 {
 		bpf_program__set_attach_target;
 		bpf_program__set_lsm;
 		bpf_set_link_xdp_fd_opts;
+		bpf_program__is_sk_lookup;
+		bpf_program__set_sk_lookup;
 } LIBBPF_0.0.7;
 
 LIBBPF_0.0.9 {
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 2c92059c0c90..5c6d3e49f254 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -109,6 +109,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
 	case BPF_PROG_TYPE_STRUCT_OPS:
 	case BPF_PROG_TYPE_EXT:
 	case BPF_PROG_TYPE_LSM:
+	case BPF_PROG_TYPE_SK_LOOKUP:
 	default:
 		break;
 	}
-- 
2.25.3