libbpf: Support sysctl hook

Support BPF_PROG_TYPE_CGROUP_SYSCTL program in libbpf: identifying
program and attach types by section name, probe.

Signed-off-by: Andrey Ignatov <rdna@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

2 files changed, 4 insertions, 0 deletions

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 67484cf32b2e..e5b77ad97795 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -2064,6 +2064,7 @@ static bool bpf_prog_type__needs_kver(enum bpf_prog_type type)
         case BPF_PROG_TYPE_TRACEPOINT:
         case BPF_PROG_TYPE_RAW_TRACEPOINT:
         case BPF_PROG_TYPE_PERF_EVENT:
+        case BPF_PROG_TYPE_CGROUP_SYSCTL:
                 return false;
         case BPF_PROG_TYPE_KPROBE:
         default:
@@ -3004,6 +3005,8 @@ static const struct {
                                                 BPF_CGROUP_UDP4_SENDMSG),
         BPF_EAPROG_SEC("cgroup/sendmsg6",       BPF_PROG_TYPE_CGROUP_SOCK_ADDR,
                                                 BPF_CGROUP_UDP6_SENDMSG),
+        BPF_EAPROG_SEC("cgroup/sysctl",         BPF_PROG_TYPE_CGROUP_SYSCTL,
+                                                BPF_CGROUP_SYSCTL),
 };
 
 #undef BPF_PROG_SEC_IMPL
diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index 8c3a1c04dcb2..0f25541632e3 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -97,6 +97,7 @@ probe_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns,
         case BPF_PROG_TYPE_LIRC_MODE2:
         case BPF_PROG_TYPE_SK_REUSEPORT:
         case BPF_PROG_TYPE_FLOW_DISSECTOR:
+        case BPF_PROG_TYPE_CGROUP_SYSCTL:
         default:
                 break;
         }