linux-kernel - [PATCH bpf-next v2 5/7] tools/libbpf: Add support for BPF_MODIFY

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Message-Id: <20200304015528.29661-6-kpsingh@chromium.org>
Date:   Wed,  4 Mar 2020 02:55:26 +0100
From:   KP Singh <kpsingh@...omium.org>
To:     linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Cc:     Andrii Nakryiko <andriin@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Paul Turner <pjt@...gle.com>, Jann Horn <jannh@...gle.com>,
        Florent Revest <revest@...omium.org>,
        Brendan Jackman <jackmanb@...omium.org>
Subject: [PATCH bpf-next v2 5/7] tools/libbpf: Add support for BPF_MODIFY_RETURN

From: KP Singh <kpsingh@...gle.com>

Signed-off-by: KP Singh <kpsingh@...gle.com>
Acked-by: Andrii Nakryiko <andriin@...com>
---
 tools/lib/bpf/libbpf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index f8c4042e5855..223be01dc466 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -6288,6 +6288,10 @@ static const struct bpf_sec_def section_defs[] = {
 		.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,
-- 
2.20.1