netdev - [RFCv2 bpf-next 11/12] libbpf: Add support for inet

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Message-Id: <20190828072250.29828-12-jakub@cloudflare.com>
Date:   Wed, 28 Aug 2019 09:22:49 +0200
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     bpf@...r.kernel.org, netdev@...r.kernel.org
Cc:     kernel-team@...udflare.com, Lorenz Bauer <lmb@...udflare.com>,
        Marek Majkowski <marek@...udflare.com>
Subject: [RFCv2 bpf-next 11/12] libbpf: Add support for inet_lookup program type

Make libbpf aware of the newly added program type. Reserve a section name
for it.

Reviewed-by: Lorenz Bauer <lmb@...udflare.com>
Signed-off-by: Jakub Sitnicki <jakub@...udflare.com>
---
 tools/lib/bpf/libbpf.c        | 4 ++++
 tools/lib/bpf/libbpf.h        | 2 ++
 tools/lib/bpf/libbpf.map      | 2 ++
 tools/lib/bpf/libbpf_probes.c | 1 +
 4 files changed, 9 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 2233f919dd88..addb9762e965 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -3580,6 +3580,7 @@ static bool bpf_prog_type__needs_kver(enum bpf_prog_type type)
 	case BPF_PROG_TYPE_PERF_EVENT:
 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
 	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
+	case BPF_PROG_TYPE_INET_LOOKUP:
 		return false;
 	case BPF_PROG_TYPE_KPROBE:
 	default:
@@ -4447,6 +4448,7 @@ BPF_PROG_TYPE_FNS(tracepoint, BPF_PROG_TYPE_TRACEPOINT);
 BPF_PROG_TYPE_FNS(raw_tracepoint, BPF_PROG_TYPE_RAW_TRACEPOINT);
 BPF_PROG_TYPE_FNS(xdp, BPF_PROG_TYPE_XDP);
 BPF_PROG_TYPE_FNS(perf_event, BPF_PROG_TYPE_PERF_EVENT);
+BPF_PROG_TYPE_FNS(inet_lookup, BPF_PROG_TYPE_INET_LOOKUP);
 
 void bpf_program__set_expected_attach_type(struct bpf_program *prog,
 					   enum bpf_attach_type type)
@@ -4542,6 +4544,8 @@ static const struct {
 						BPF_CGROUP_GETSOCKOPT),
 	BPF_EAPROG_SEC("cgroup/setsockopt",	BPF_PROG_TYPE_CGROUP_SOCKOPT,
 						BPF_CGROUP_SETSOCKOPT),
+	BPF_EAPROG_SEC("inet_lookup",		BPF_PROG_TYPE_INET_LOOKUP,
+						BPF_INET_LOOKUP),
 };
 
 #undef BPF_PROG_SEC_IMPL
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index e8f70977d137..937d6da9430a 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -262,6 +262,7 @@ LIBBPF_API int bpf_program__set_sched_cls(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_sched_act(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_xdp(struct bpf_program *prog);
 LIBBPF_API int bpf_program__set_perf_event(struct bpf_program *prog);
+LIBBPF_API int bpf_program__set_inet_lookup(struct bpf_program *prog);
 LIBBPF_API void bpf_program__set_type(struct bpf_program *prog,
 				      enum bpf_prog_type type);
 LIBBPF_API void
@@ -276,6 +277,7 @@ LIBBPF_API bool bpf_program__is_sched_cls(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_sched_act(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_xdp(const struct bpf_program *prog);
 LIBBPF_API bool bpf_program__is_perf_event(const struct bpf_program *prog);
+LIBBPF_API bool bpf_program__is_inet_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 664ce8e7a60e..57564ad458ba 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -67,6 +67,7 @@ LIBBPF_0.0.1 {
 		bpf_prog_test_run;
 		bpf_prog_test_run_xattr;
 		bpf_program__fd;
+		bpf_program__is_inet_lookup;
 		bpf_program__is_kprobe;
 		bpf_program__is_perf_event;
 		bpf_program__is_raw_tracepoint;
@@ -84,6 +85,7 @@ LIBBPF_0.0.1 {
 		bpf_program__priv;
 		bpf_program__set_expected_attach_type;
 		bpf_program__set_ifindex;
+		bpf_program__set_inet_lookup;
 		bpf_program__set_kprobe;
 		bpf_program__set_perf_event;
 		bpf_program__set_prep;
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 4b0b0364f5fc..c365223a2d1e 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -102,6 +102,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
 	case BPF_PROG_TYPE_FLOW_DISSECTOR:
 	case BPF_PROG_TYPE_CGROUP_SYSCTL:
 	case BPF_PROG_TYPE_CGROUP_SOCKOPT:
+	case BPF_PROG_TYPE_INET_LOOKUP:
 	default:
 		break;
 	}
-- 
2.20.1