From: KP Singh <kpsingh@google.com>
Date: Wed, 4 Mar 2020 20:18:51 +0100
Subject: tools/libbpf: Add support for BPF_MODIFY_RETURN
Patch-mainline: v5.7-rc1
Git-commit: aca228cd3387447d99d3ebaee3ebcc2b015a3e46
References: bsc#1177028

Signed-off-by: KP Singh <kpsingh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200304191853.1529-6-kpsingh@chromium.org
Acked-by: Gary Lin <glin@suse.com>
---
 tools/lib/bpf/libbpf.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -6291,6 +6291,10 @@ static const struct bpf_sec_def section_
 		.expected_attach_type = BPF_TRACE_FENTRY,
 		.is_attach_btf = true,
 		.attach_fn = attach_trace),
+	SEC_DEF("fmod_ret/", TRACING,
+		.expected_attach_type = BPF_MODIFY_RETURN,
+		.is_attach_btf = true,
+		.attach_fn = attach_trace),
 	SEC_DEF("fexit/", TRACING,
 		.expected_attach_type = BPF_TRACE_FEXIT,
 		.is_attach_btf = true,