From 42d1d53fedc9980e8fed98a5a03762cba7d2e9f6 Mon Sep 17 00:00:00 2001
From: Alexei Starovoitov <ast@kernel.org>
Date: Mon, 31 Jan 2022 14:05:22 -0800
Subject: [PATCH] libbpf: Add support for bpf iter in light skeleton.
bpf iterator programs should use bpf_link_create to attach instead of
bpf_raw_tracepoint_open like other tracing programs.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220131220528.98088-2-alexei.starovoitov@gmail.com
---
tools/bpf/bpftool/gen.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c
index 8f78c27d41f0b..8eacfc79ec431 100644
--- a/tools/bpf/bpftool/gen.c
+++ b/tools/bpf/bpftool/gen.c
@@ -384,7 +384,10 @@ static void codegen_attach_detach(struct bpf_object *obj, const char *obj_name)
printf("\tint fd = bpf_raw_tracepoint_open(\"%s\", prog_fd);\n", tp_name);
break;
case BPF_PROG_TYPE_TRACING:
- printf("\tint fd = bpf_raw_tracepoint_open(NULL, prog_fd);\n");
+ if (bpf_program__expected_attach_type(prog) == BPF_TRACE_ITER)
+ printf("\tint fd = bpf_link_create(prog_fd, 0, BPF_TRACE_ITER, NULL);\n");
+ else
+ printf("\tint fd = bpf_raw_tracepoint_open(NULL, prog_fd);\n");
break;
default:
printf("\tint fd = ((void)prog_fd, 0); /* auto-attach not supported */\n");
--
2.30.2